Motorola AT Commands G24-L, G24-LC Developer's Manual

Technical Information

Motorola G24-L and G24-LC Developer’s Guide

AT Commands Reference Manual

APRIL 15, 2008

6802983C95-C

Notice

While reasonable efforts have been made to assure the accuracy of this document, Motorola, Inc. assumes no liability resulting
from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this
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inaccuracies or omissions. Motorola, Inc. reserves the right to make changes to any products described herein and reserves the
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VENDOR COPYRIGHT

Apache Software Foundation - Copyright 2004-2005 All Rights Reserved

Usage and Disclosure Restrictions

License Agreements

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Components, units, or third-party products used in the product described herein are NOT fault-tolerant and are NOT designed,
manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe
controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air T raffic Control, Life
Support, or W eapons Sy stems (High Risk Acti vities"). Motorola and its supplier(s) specifically disclaim any expressed or implied
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©Copyright 2007 Motorola, Inc.

Copyright, Trademarks and Disclaimer

REV052604

Table of Contents

Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Target Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvii

Manual Organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

Contact Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

Text Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

Manual Banner Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix

Field Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix

General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix

Caring for the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxi

Limitation of Liability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

Warranty Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii

How to Get Warranty Service? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii

Claiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv

Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv

What is Not Covered by the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv

Installed Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv

Out of Warranty Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxvi

Chapter 1: Product Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Connectivity Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

GPRS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Technical Description (GPRS – Class B Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

CSD Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Improved OEM Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

SIM Application Toolkit (STK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Technical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Profile Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Data Transfer into the SIM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Set up Idle Mode Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Menu Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Call Control by SIM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

April 15, 2008 G24-L AT Commands Reference Manual i

Ta ble of Contents

Short Message Service (SMS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Character Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

AT Commands Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

TCP/UDP IP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

UDP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Technical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Technical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

ASCII Character Set Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

GSM Character Set Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

UCS2 Character Set Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

UTF-8 Character Set Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

8859-1 Character Set Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Chapter 2: Introduction to AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

AT Commands Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

General Symbols Used in AT Commands Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

General System Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

AT Commands Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

AT Commands Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Command Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Results Code Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Response and Indications Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

AT Commands Protocol & Structure Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Command Token Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Basic Syntax Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

S-parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Extended Syntax Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Command Argument Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Numeric Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

String Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Command Mode Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Parameter Set Command Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Parameter Read Command Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Parameter Test Command Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Range of Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Compound Range of Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Aborting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Chapter 3: AT Commands Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Modem ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

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Subscriber Unit Identity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

+CGMI, +GMI, +FMI, Request Manufacturer ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

+CGMM, +GMM, +FMM, Request Model ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

+CGMR, +GMR, +FMR, Request Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

+CGSN, +GSN, Request Product Serial Number Identification . . . . . . . . . . . . . . . . . . . . . . . 3-3

+CSCS, Select Terminal Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

+CIMI, Request IMSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

+CFSN, Read Manufacturing Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

I, Request Identification Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

+CNUM, Request MSISDN(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

$, List of All Available AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

+CLAC, List of All Available AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Capability Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Call Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Managing a CSD (Data) Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Simple Dialing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Switching From Data Mode to Command Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Hanging Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Dialing to an Electronic Telephone Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Receiving a Data Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Call Control AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

D, Dial Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

D>, Direct Dialing from Phone Books. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

DL, Dial Last Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

H, Hang-up Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

A, Answer Incoming Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

+CRC, Cellular Result Codes and RING, +CRING - Incoming Call Indication. . . . . . . . . . 3-17

+CLIP, Calling Line Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

+CCWA, Call Waiting Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

+CHLD, Call Related Supplementary Services Command . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

+CCFC, Call Forwarding Number and Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

+CLIR, Calling Line Identification Restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

+CBST, Select Bearer Service Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

O, Return to Online Data State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

&Q, Asynchronous Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

+CHUP, Hang Up Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34

+CSNS, Single Numbering Call Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34

+MDC, Selection of Desired Message to Be Displayed Upon Connection of a Voice Call . 3-36

+CTFR1, Divert an Incoming Call When User Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

+MVC, Motorola Vocoders Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38

Call Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

+CPAS, Phone Activity Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

+CLCC, List Current Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40

+MCST, Call Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42

Call Advice of Charge Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

+CAOC, Advice of Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

+CACM, Accumulated Call Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46

+CAMM, Accumulated Call Meter Maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47

+CPUC, Price per Unit and Currency Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-48

+CR, Service Reporting Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-49

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Phone Books and Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60

SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75

Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-117

Hardware Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-129

Supplementary Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50

+CSSN, Supplementary Service Notifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50

+CUSD, Unstructured Supplementary Service Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53

+COLP, Connected Line Identification Presentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-56

+MTTY, Motorola TTY Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57

Directory Access Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60

+CPBS, Select Phone Book Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60

+CPBR, Read Phone Book Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-61

+CPBF, Find Phone Book Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63

+CPBW, Write Phone Book Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64

+CSVM, Set Voice Mail Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-66

+MDSI, Motorola Deactivate SIM Card Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67

+MCSN, Motorola Change Subscriber Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-69

System Date and Time Access Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73

+CCLK, Read/Set System Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73

SMS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75

+CSMS, Select Message Service.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75

+CPMS, Preferred Message Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-76

+CMGF, Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-77

+CSCA, Service Center Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-78

+CSMP, Set Text Mode Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-79

+CSDH, Show Text Mode Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-81

+CNMI, New Message Indications to Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-82

+CNMA, New Message Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-84

+CMTI, Unsolicited Response (New SMS-DELIVER Receipt Indication) . . . . . . . . . . . . . 3-86

+CMT, Unsolicited Response (New SMS-DELIVER Receipt). . . . . . . . . . . . . . . . . . . . . . . 3-86

+CDSI, Unsolicited Response (New SMS-STATUS-REPORT Indication) . . . . . . . . . . . . . 3-88

+CDS, Unsolicited Response (New SMS-STATUS-REPORT Receipt). . . . . . . . . . . . . . . . 3-88

+CMGL, +MMGL, List Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-89

+CMGR, +MMGR, Read Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-94

+MMAR, Motorola Mark As Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-101

+CMSS, Send Message From Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-101

+CMGW, Write Message to Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103

+CMGD, Delete Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-108

+CGSMS, Select Service for MO SMS Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-109

+CMGS, Send SM to Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-110

+MCSAT, Motorola Control SMS Alert Tone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-111

DCS handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113

Network Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-117

+CSQ, Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-117

+CRLP, Radio Link Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-118

+CREG, Network Registration Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-119

+CGREG, GPRS Network Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-121

+COPS, Operator Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-122

+CPOL, Preferred Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-125

+MFS, Motorola Frequency of Search. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-126

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Hardware Information Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-129

+CBC, Battery Charger Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-129

+MBC, Battery Charger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-130

+CBAUD, Baud Rate Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-132

+IPR, Local Terminal/G24-L Serial Port Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-133

+MTDTR, DTR Line Test Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-134

+MTCTS, CTS Line Test Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-135

&K, RTS/CTS Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-135

&C, Circuit 109 Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-136

&D, Circuit 108 Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-138

+MCWAKE, GPRS Coverage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-139

+MGGIND, GSM/GPRS Service Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-140

+CFUN, Shut Down Phone Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-141

+ICF, DTE-DCE Character Framing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-142

ATS97, Antenna Diagnostic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-143

+MRST, Perform Hard Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-143

+MIOC, Motorola I/O Configure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-144

+MIOD, Motorola I/O Define . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-147

+MMAD, Query and Monitor ADC Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-149

+MPCMC, Continuous PCM Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-153

Audio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-155

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-155

Audio Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-156

Basic Audio Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-157

Advanced Audio Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-157

General Audio Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-158

Basic Audio Setup Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-158

+CRSL, Call Ringer Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-158

+CLVL, Loudspeaker Volume. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-159

+CMUT, Mute/Unmute Currently Active Microphone Path. . . . . . . . . . . . . . . . . . . . . . . . 3-160

S94, Sidetone Effect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-161

S96, Echo Canceling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-162

Advanced Audio Setup Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-163

+MAPATH, Audio Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-163

+MAVOL, Volume Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-166

+MAMUT, Input Devices Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-168

+MAFEAT, Features Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-169

General Audio Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-170

+MADIGITAL, Analog/Digital Audio Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-170

+CALM, Alert Sound Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-171

+ MMICG, Microphone Gain Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-172

+CRTT, Ring Type Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-173

+VTD, Tone Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-175

+VTS, Command-Specific Tone Duration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-176

Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-177

Access Control Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-177

A/, Repeat Last Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-177

AT, Check AT Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-177

+CPIN, Enter PIN for Unlocking SIM Card or Enter PUK for Unblocking SIM Card . . . 3-177

+EPIN, Enter SIM PIN2 to Verify PIN2 Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-181

+TPIN, Query Number of Remaining SIM PIN/PUK Entering Attempts. . . . . . . . . . . . . . 3-182

+CPWD, Change Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-183

+CLCK, Facility Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-184

+EMPC, Unlocking or Locking Subsidy Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-187

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Modem Configuration and Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-190

UI (User Interface). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-216

GPRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-230

Modem Register Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-190

V, G24-L Response Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-190

Q, Result Code Suppression. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-191

E, Command Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-192

X, Result Code Selection and Call Progress Monitoring Control . . . . . . . . . . . . . . . . . . . . 3-193

S, Bit Map Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-194

\S, Show the Status of the Commands and S-registers in Effect . . . . . . . . . . . . . . . . . . . . . 3-197

\G, Software Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-197

\J, Terminal Auto Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-197

\N, Link Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-197

+CBAND, Change Radio Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-197

?, Return the Value of the Last Updated S-register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-198

&F, Set to Factory Defined Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-198

Z, Reset to Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-199

Sleep Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-199

Sleep Mode AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-200

Sleep Mode HW Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-200

S24, Set Number of Seconds Delay Before G24-L Enters Sleep Mode. . . . . . . . . . . . . . . . 3-202

S102, Set Delay Before Sending Data to the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-203

S100, Set Minimum Time for Terminal to Fall into Sleep Mode . . . . . . . . . . . . . . . . . . . . 3-204

+MSCTS, Enable/Disable CTS During Wakeup Period . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-205

Error Handling Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-206

+CMEE, Report Mobile Equipment Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-206

+CEER, Extended Error Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-213

+CRSM, Restricted SIM Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-216

&V, View Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-221

&W, Store User Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-222

&Y, Default User Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-224

+CMER, Mobile Equipment Event Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-225

+CLAN, ME Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-225

+CIND, Indicator Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-227

Unsolicited UI Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-229

+CIEV, Indicator Event Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-229

GPRS Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-230

GPRS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-230

+CGCLASS, GPRS Mobile Station Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-231

+CGDCONT, Define PDP Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-232

+CGQMIN, Quality of Service Profile (Min Acceptable) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-234

+CGQREQ, Quality of Service Profile (Requested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-236

+CGATT, GPRS Attach or Detach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-237

+CGPADDR, Show PDP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-238

+MGEER, GPRS Extended Error Report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-240

D*99, Request GPRS Service "D" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-242

+CGPRS, GPRS Coverage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-244

+CGACT, PDP Context Activate or Deactivate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-245

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STK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-246

STK Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-247

+MTKR, Profile Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-247

+MTKE, Motorola ToolKit Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-257

+MTKP, Motorola ToolKit Proactive (Unsolicited Indication). . . . . . . . . . . . . . . . . . . . . . 3-258

+MTKM, Motorola ToolKit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-272

+MTKM, Motorola ToolKit Menu (Response) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-273

+MTKC, Motorola ToolKit Call Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-274

+MTKA, Motorola Toolkit Acknowledge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-274

TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-276

+MIPCALL, Create a Wireless Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-276

+MIPOPEN, Open a Socket (UDP or TCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-277

+MIPODM, Open a Socket (UDP or TCP) in Online Data Mode. . . . . . . . . . . . . . . . . . . . 3-279

+MIPCLOSE, Close a Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-282

+MIPSETS, Set Size for Automatic Push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-283

+MIPSEND, Send Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-284

+MIPPUSH, Push Data into Protocol Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-285

+MIPFLUSH, Flush Data from Buffers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-286

+MIPRUDP, Receive Data from UDP Protocol Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-287

+MIPRTCP, Receive Data from TCP Protocol Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-287

+MIPSTAT, Status Report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-288

MIPXOFF, Flow Control - Xoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-288

MIPXON, Flow Control - Xon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-289

MIPCONF - Configure Internal TCP/IP stack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-289

+MPING, Start Ping Execution (ICMP Protocol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-292

+MPINGSTAT, Status Update for +MPING Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-296

+MSDNS, Set DNS IP Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-299

+MIPCFF, Control Filtering Feature for Incoming TCP Connection . . . . . . . . . . . . . . . . . 3-301

NOP - Compatible. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-304

IGNORED (Compatible Only) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-304

Chapter 4: Using the Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Setting Up the G24-L (Power On and Initial Actions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Recommended G24-L Initialization after Powerup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

RS232 Lines Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Test G24-L Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Basic Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

SIM Card Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

G24-L Network Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Terminal Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

SMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Managing Stored Messages in the G24-L Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Setting the Notification Indication for Incoming Messages (Using AT+CNMI) . . . . . . . . . . . 4-11

Another Possible Option for Setting the CNMI Notification Indication . . . . . . . . . . . . . . . . . . 4-11

Setting TEXT Mode Parameters (Using AT+CMGW and AT+CMGS) . . . . . . . . . . . . . . . . . . 4-11

Writing, Saving and Sending Messages (Using AT+CMGW and AT+CMSS) . . . . . . . . . . . . 4-12

Sending Messages (Using AT+CMGS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Deleting Messages (Using AT+CMGD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Call Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Dialing Using ATD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Direct Dialing from Phone Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Dialing the Last Number Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

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Data Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

GPRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Changing the Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

STK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29

Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

Voice Call Manipulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Call Waiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Call Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Conference Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Switching Modes (Data Mode/Command Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

Establishing GPRS PDP Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Activating a Saved Profile in G24-L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Two Ways to Activate PDP Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Display Text/Display Idle Mode Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Get Inkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Get Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Play Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Set Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Select Item . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Send SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Set Up Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Call Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Send DTMF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Launch Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Setup Event List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

TCP Data Transfer Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29

Multi-point Data Transfer Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29

Xoff and Xon Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

Error in Reopening a Valid Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31

Scenarios for Setting Up Handset Mode or Handsfree Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

Handset Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

Handsfree Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

Chapter 5: Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Tools Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Appendix A: Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

AT Commands Alphabetical Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Character Set Table CS1: (GSM -> UCS-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-17

Character Set Table CS2: (ASCII <-> UTF-8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-21

Character Set Table CS3: (UCS-2 <-> UTF-8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-21

Character Set Table CS6: (UCS-2 Full table) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-21

Character Set Table CS7: (ASCII table) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-22

viii G24-L AT Commands Reference Manual April 15, 2008

List of Figures

1-1 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

1-2 Sidetone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

1-3 Echo Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

2-1 AT Commands Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 -2

2-2 Basic Structure of a Command Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

2-3 Response to a Command Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

2-4 Flow and Structure Configuration Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

3-1 TTY Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59

3-2 Audio Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-156

3-3 Basic Audio Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-157

3-4 Advanced Audio Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-157

3-5 Analog/Digital Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-158

3-6 Audio Paths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-164

3-7 G24-L Audio Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-166

3-8 SIM States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-178

3-9 Wakeup-In Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-201

3-10 Wake up Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-201

3-11 Sleep Mode when S24 > 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-202

3-12 G24-L Lines when S24 > 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-202

3-13 SIM Toolkit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-246

3-14 Communication During DTMF Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-264

3-15 Communication During Launch Browser Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-265

3-16 CIDR Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-301

4-1 Phone State Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4-2 Detailed Phone State Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

4-3 Recommended G24-L Initialization Workflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

4-4 RS232 Lines Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

4-5 Test G24-L Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

4-6 Basic Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

4-7 SIM Card Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

4-8 G24-L Network Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

4-9 Terminal Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4- 9

4-10 Call States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

4-11 Sleep Mode when S24 > 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22

4-12 Display Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

4-13 Get Inkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

4-14 Get Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24

4-15 Play Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24

4-16 Set Up Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-25

4-17 Select Item . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-25

4-18 Send SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-25

4-19 Set Up Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-26

4-20 Call Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-26

4-21 Send DTMF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27

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List of Figures

4-22 Launch Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27

4-23 Setup Event List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-28

4-24 Handset or Handsfree Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-32

x G24-L AT Commands Reference Manual April 15, 2008

List of Tables

1-1 AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

3-1 +CGSN, +GSN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

3-2 +CSCS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -4

3-3 +CNUM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

3-4 D Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

3-5 D> Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

3-6 DL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

3-7 +CRC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

3-8 +CLIP Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

3-9 +CCWA Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22

3-10 +CHLD Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24

3-11 +CHLD Actions According to Call State and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25

3-12 +CCFC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28

3-13 +CLIR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30

3-14 +CBST Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32

3-15 +CSNS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-35

3-16 Mapping Table (V.34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-36

3-17 +MVC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3 8

3-18 +CPAS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-39

3-19 +CLCC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-41

3-20 +MCST Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-43

3-21 +CAOC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-44

3-22 +CACM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-46

3-23 +CAMM Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-47

3-24 +CPUC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-48

3-25 +CR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-49

3-26 +CSSN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-51

3-27 +CSSI Notification Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-51

3-28 +CSSU Notification Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-51

3-29 +CUSD Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-53

3-30 CUSD Termination Cause Table Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54

3-31 +COLP Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-57

3-32 +MTTY Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-58

3-33 +CPBS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-61

3-34 +CPBR Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62

3-35 +CPBF Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64

3-36 +CPBW Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-65

3-37 +CSVM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-67

3-38 +MDSI Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-68

3-39 +MCSN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-71

3-40 +CCLK Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-74

3-41 +CSMS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-75

3-42 +CPMS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-77

3-43 +CMGF Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-77

3-44 +CSCA Input Characters and Hexadecimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-78

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List of Tables

3-45 +CSCA Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-79

3-46 +CSMP Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-80

3-47 VP Relative Format (In Integer Format). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-80

3-48 +CSDH Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-82

3-49 +CNMI Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-83

3-50 +CMTI Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-86

3-51 +CMT Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-87

3-52 +CDSI Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-88

3-53 +CDS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-89

3-54 +CGML/+MMGL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-92

3-55 +CMGR/+MMGR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-95

3-56 Layout of SMS-DELIVER in PDU Mode (according to GSM03.40) . . . . . . . . . . . . . . . . . .3-96

3-57 <fo> for SMS-DELIVER Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-97

3-58 Layout of SMS-STATUS-REPORT in PDU Mode (according to GSM03.40) . . . . . . . . . . .3-97

3-59 <fo> for SMS-STATUS-REPORT Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-99

3-60 <TP-PI> for SMS-STATUS-REPORT Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-99

3-61 +MMAR Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-101

3-62 +CMSS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-102

3-63 +CMGW Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-103

3-64 Layout of SMS-SUBMIT in PDU Mode: (according to GSM03.40). . . . . . . . . . . . . . . . . .3-104

3-65 Layout of SMS-COMMAND in PDU Mode: (according to GSM03.40). . . . . . . . . . . . . . .3-104

3-66 <fo> for SMS-SUBMIT Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-105

3-67 <fo> for SMS-COMMAND Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-106

3-68 +CMGD Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-108

3-69 +CGSMS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-109

3-70 +CMGS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-110

3-71 +MCSAT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-111

3-72 <dcs> field and +CSCS settings conversion when writing SM . . . . . . . . . . . . . . . . . . . . . .3-113

3-73 <dcs> field and +CSCS settings conversion when reading SM . . . . . . . . . . . . . . . . . . . . . .3-114

3-74 +CSQ Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-117

3-75 +CRLP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-118

3-76 +CREG Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-119

3-77 +CGREG Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-121

3-78 +COPS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-124

3-79 +CPOL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-126

3-80 +MFS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-128

3-81 +CBC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-129

3-82 +MBC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-131

3-83 Battery Level Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-131

3-84 +CBAUD Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-132

3-85 +IPR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-134

3-86 +MTDTR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-135

3-87 &K Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-136

3-88 &C Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-137

3-89 &D Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-138

3-90 +MCWAKE Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-139

3-91 +MGGIND Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-140

3-92 +CFUN Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-141

3-93 +ICF Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-142

3-94 ATS97 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-143

3-95 +MIOC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-145

3-96 +MIOD Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-148

3-97 Keypad GPIOs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-148

3-98 +MMAD Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-151

xii G24-L AT Commands Reference Manual April 15, 2008

List of Tables

3-99 +MPCMC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-154

3-100 Basic and Advanced Audio Modes Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-156

3-101 +CRSL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-159

3-102 +CLVL Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-160

3-103 +CMUT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-160

3-104 ATS94 and ATS96 Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-161

3-105 S94 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-162

3-106 ATS96 and ATS94 Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-162

3-107 S96 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-163

3-108 +MAPATH Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-165

3-109 +MAVOL Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-167

3-110 MAMUT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-168

3-111 MAFEAT Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-169

3-112 +MADIGITAL Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-170

3-113 +CALM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-171

3-114 +MMICG Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-172

3-115 +CRTT Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-173

3-116 Ring Tone Types Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-174

3-117 +VTD Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-175

3-118 +VTS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-176

3-119 SIM Card Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-178

3-120 +CPIN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-179

3-121 +EPIN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-181

3-122 +TPIN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-182

3-123 +CPWD Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-183

3-124 +CLCK Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-185

3-125 +EMPC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-188

3-126 Effects of Parameter Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-190

3-127 V Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -191

3-128 Qn Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-192

3-129 En Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-192

3-130 X Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -193

3-131 S2 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-196

3-132 S12 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-197

3-133 &F Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-198

3-134 Z Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-199

3-135 S24 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-203

3-136 S102 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-204

3-137 Command parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-205

3-138 +MSCTS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-206

3-139 +CMEE Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-207

3-140 +CME Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-208

3-141 +CMS Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-210

3-142 +STK Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-211

3-143 +CEER Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-214

3-144 +CRSM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-217

3-145 &W Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-222

3-146 Profile Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-222

3-147 &Y Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-224

3-148 +CMER Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-225

3-149 +CLAN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. .3-226

3-150 +CIND Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-227

3-151 +CIEV Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-229

3-152 +CGCLASS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-231

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List of Tables

3-153 +CGDCONT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-233

3-154 +CGQMIN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-235

3-155 +CGQREQ Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-237

3-156 +CGATT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-238

3-157 +CGADDR Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-239

3-158 +MGEER Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-241

3-159 D*99 Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-243

3-160 +CGPRS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-244

3-161 +CGACT Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-245

3-162 STK Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-247

3-163 +MTKR Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-248

3-164 Profile Structure – Byte 1 (Download). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-248

3-165 Profile Structure – Byte 2 (Other). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-249

3-166 Profile Structure – Byte 3 (Proactive SIM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-249

3-167 Profile Structure – Byte 4 (Proactive SIM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-250

3-168 Profile Structure – Byte 5 (Event driven information) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-250

3-169 Profile Structure – Byte 6 (Event driven information extensions) . . . . . . . . . . . . . . . . . . . .3-250

3-170 Profile Structure – Byte 7 (Multiple card proactive commands) . . . . . . . . . . . . . . . . . . . . .3-251

3-171 Profile Structure – Byte 8 (Proactive SIM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-251

3-172 Profile Structure – Byte 9 (Proactive SIM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-252

3-173 Profile Structure – Byte 10 (Soft keys support) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-252

3-174 Profile Structure – Byte 11 (Soft keys information). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-253

3-175 Profile Structure – Byte 12 (Bearer independent protocol proactive commands – class "e")3-253
3-176 Profile Structure – Byte 13 (Bearer independent protocol supported bearers – class "e") . .3-254

3-177 Profile Structure – Byte 14 (Screen height) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-254

3-178 Profile Structure – Byte 15 (Screen width). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-255

3-179 Profile Structure – Byte 16 (Screen effects) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-255

3-180 Profile Structure – Byte 17 (Bearer independent protocol supported transport interface – class "e")
3-255

3-181 Profile Structure – Byte 18 (Reserved). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-256

3-182 Profile Structure – Byte 19 (Reserved for TIA/EIA-136 facilities) . . . . . . . . . . . . . . . . . . .3-256

3-183 +MTKE Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-257

3-184 +MTKP Field Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-258

3-185 +MTKP Parameters of MTKP Field Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-259

3-186 +MTKP Set Command Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-262

3-187 +MTKP Parameters – Response Code 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-265

3-188 Current Event Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-266

3-189 Set Event List Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-267

3-190 Sample Language Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-268

3-191 +MTKM Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-272

3-192 +MTKM Unsolicited Identification Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-273

3-193 +MTKC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-274

3-194 +MTKA Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-275

3-195 +MIPCALL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-277

3-196 +MIPOPEN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-278

3-197 +MIPODM Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-281

3-198 +MIPCLOSE Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-282

3-199 +MIPSETS Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-283

3-200 +MIPSEND Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-284

3-201 +MIPPUSH Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-286

3-202 +MIPFLUSH Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-286

3-203 +MIPRUDP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-287

3-204 +MIPRTCP Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-288

3-205 +MIPSTAT Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-288

xiv G24-L AT Commands Reference Manual April 15, 2008

List of Tables

3-206 +MIPCONF Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-290

3-207 +MPING Command Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-293

3-208 +MPING Unsolicited Response Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-295

3-209 +MPINGSTAT Unsolicited Response Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-297

3-210 +MSDNS Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-299

3-211 +MIPCFF Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-302

3-212 Filtering Error Codes and Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-303

A-1 AT Commands (Alphabetical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

April 15, 2008 G24-L AT Commands Reference Manual xv

List of Tables

xvi G24-L AT Commands Reference Manual April 15, 2008

Preface

Note: All references to G24-L also apply to G24-LC, except where otherwise

noted.

Manual Scope

This manual introduces the G24-L A T commands, and describes how software developers can use
these commands to communicate with the G24-L device, and to create software applications that
communicate with the G24-L using these commands.

Note: The integrator should read the corresponding SW release notes for the G24-L version he

is using to get information about differences from this manual.

Target Audience

This manual is intended for software developers who communicate with the G24-L device using
the AT commands, and create applications to communicate with the G24-L device using the AT
commands.

Manual Organization

This manual contains the following chapters:

• “Preface” provides a scope for this manual, document convention, safety instructions and a

liability notification.

• “Chapter 1: Product Features” introduces the new product features and provides a list of the

AT commands.

• “Chapter 2: Introduction to AT Commands” provides an introduction to the AT commands,

and includes a general explanation of the command’s format and usage. It also describes
supported character sets and error handling.

• “Chapter 3: AT Commands Reference” provides a reference to all available AT commands,

including examples, where relevant.

• “Chapter 4: Using the Commands” provides scenarios and examples for implementing

various G24-L functionality, including G24-L setup and connectivity, SMS, call control, data
calls, GPRS, Sleep mode, audio, STK and TCP/IP.

• “Chapter 5: Tools” describes the the G24-L drivers and application flashing tool.

• “Appendix A: Reference Tables” provides conversions between different character sets. It

also provides an alphabetical list of all the AT commands.

April 15, 2008 G24-L AT Commands Reference Manual xvii

Applicable Documents

Applicable Documents

• G24-L Module Hardware Description – 6802984C05

• G24-L Developer’s Kit – 6802984C10

Contact Us

We at Motorola want to make this guide as helpful as possible. Keep us informed of your
comments and suggestions for improvements.

For general contact, technical support, report documentation errors and to order manuals, use this
email address:

[e-mail]
Motorola appreciates feedback from the users of our information.

Text Conventions

The following special paragraphs are used in this guide to point out information that must be read.
This information may be set-off from the surrounding text, but is always preceded by a bold title
in capital letters:

Note

Note: Presents additional, helpful, noncritical information that you can use.

Warning

Warning: Presents information to warn you of a potentially hazardous situation in which there

is a possibility of personal injury.

Important

Important: Presents information to help you avoid an undesirable situation

or provides additional information to help you understand a topic or concept.

Caution

Caution: Presents information to identify a situation in which damage to software, stored

data, or equipment could occur, thus avoiding the damage.

xviii G24-L AT Commands Reference Manual April 15, 2008

Manual Banner Definitions

A banner text in the page footer under the book title (for example, Preliminary or FOA) indicates
that some information contained in the manual is not yet approved for general customer use.

Field Service

For Field Service requests, use this email address:
[e-mail]

General Safety

Remember!. . . safety depends on you!

The following general safety precautions must be observed during all phases of operation,
service, and repair of the equipment described in this manual. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety standards of
design, manufacture, and intended use of the equipment. Motorola, Inc. assumes no liability for
the customer’s failure to comply with these requirements. The safety precautions listed below
represent warnings of certain dangers of which we are aware. You, as the user of this product,
should follow these warnings and all other safety precautions necessary for the safe operation of
the equipment in your operating environment.

Preface

Ground the instrument

To minimize shock hazard, the equipment chassis and enclosure must be connected to an
electrical ground. If the equipment is supplied with a three-conductor AC power cable, the power
cable must be either plugged into an approved three-contact electrical outlet or used with a three­contact to two-contact adapter. The three-contact to two-contact adapter must have the grounding
wire (green) firmly connected to an electrical ground (safety ground) at the power outlet. The
power jack and mating plug of the power cable must meet International Electrotechnical
Commission (IEC) safety standards.

Note: Refer to “Grounding Guideline for Cellular Radio Installations”–Motorola part no.

68P081150E62.

Do not operate in an explosive atmosphere

Do not operate the equipment in the presence of flammable gases or fumes. Operation of any
electrical equipment in such an environment constitutes a definite safety hazard.

Do not service or adjust alone

Do not attempt internal service or ad justment unless another person, capable of rendering first aid
is present.

April 15, 2008 G24-L AT Commands Reference Manual xix

General Safety

Keep away from live circuits

Operating personnel must:

• not remove equipment covers. Only Factory Authorized Service Personnel or other qualified

maintenance personnel may remove equipment covers for internal subassembly, or
component replacement, or any internal adjustment

• not replace components with power cable connected. Under certain conditions, dangerous

voltages may exist even with the power cable removed

• always disconnect power and discharge circuits before touching them

Do not substitute parts or modify equipment

Because of the danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification of equipment. Contact Motorola Warranty and Repair for service
and repair to ensure that safety features are maintained.

Batteries

Batteries can cause property damage and/or bodily injury such as burns if a conductive material
such as jewelry, keys, or beaded chains touch exposed terminals. The conductive material may
complete an electrical circuit (short circuit) and become quite hot. Exercise care in handling any
charged battery, particularly when placing it inside a pocket, purse, or other container with metal
objects. Use only Motorola original batteries and chargers.

Your battery may cont ain symbols, defined as follows:

Symbol Definition

Important safety information will follow.

Your battery or phone should not be disposed of in a fire.

Your battery or phone may require recycling in accordance with
local laws. Contact your local regulatory authorities for more
information.

Your battery or phone should not be thrown in the trash.

Your phone contains an internal lithium ion battery.

Li Ion BATT

xx G24-L AT Commands Reference Manual April 15, 2008

Dangerous procedure warnings

Warnings, such as the example below, precede potentially dangerous procedures throughout this
manual. Instructions contained in the warnings must be followed. You should also employ all
other safety precautions that you deem necessary for the operation of the equipment in your
operating environment.

Warning example:

Warning: Dangerous voltages, capable of causing death, are present in this equipment. Use

extreme caution when handling, testing, and adjusting.

Caring for the Environment

The following information is provided to enable regulatory compliance with the European Union
(EU) Directive 2002/96/EC Waste Electrical and Electronic Equipment (WEEE) when using
Motorola equipment in EU countries.

Preface

Disposal of Motorola equipment in EU countries

Please do not dispose of Motorola equipment in landfill sites.
In the EU, Motorola in conjunction with a recycling partner will ensure that equipment is

collected and recycled according to the requirements of EU environmental law.
Please contact the Customer Network Resolution Center (CNRC) for assistance. The 24 hour

telephone numbers are listed at

http://mynetworksupport.motorola.com

Select Customer Network Resolution Center contact information.
Alternatively if you do not have access to CNRC or the internet, contact the Local Motorola

Office.

Disposal of Motorola equipment in non-EU countries

In non-EU countries, dispose of Motorola Networks equipment in accordance with national and
regional regulations.

RoHS Compliance

The G24-L/LC product meets the European Union directive for RoHS compliance.
The RoHS compliance is subject to a declaration of conformity that may be viewed upon request.

April 15, 2008 G24-L AT Commands Reference Manual xxi

Limitation of Liability

᳝↦᳝ᆇ⠽䋼៪ܗ㋴

䚼ӊৡ⿄

䪙˄Pb˅∲˄Hg˅䬝˄Cd˅

݁Ӌ䫀
Cr6+)

໮⒈㘨㣃
˄PBB˅

໮⒈Ѡ㣃䝮
˄PBDE˅

R˖㸼⼎䆹᳝↦᳝ᆇ⠽䋼೼䆹䚼ӊ᠔᳝ഛ䋼ᴤ᭭Ёⱘ৿䞣ഛ೼SJ/T 11363-2006
󰵼ޚ㾘ᅮⱘ䰤䞣㽕∖ҹϟDŽ
×˖㸼⼎䆹᳝↦᳝ᆇ⠽䋼㟇ᇥ೼䆹䚼ӊⱘᶤϔഛ䋼ᴤ᭭Ёⱘ৿䞣䍙ߎSJ/T 11363-2006
󰵼ޚ㾘ᅮⱘ䰤䞣㽕∖DŽ

Cellular Phone x o oooo
Battery x o oooo
Accessories x o oooo

CMM Compliance

The disclosure table and symbols below are provided in accordance with Section 5 & 6 of the
People's Republic of China's "Electronic Industry Marking Standard for Control of Pollution
Caused by Electronic Information Products". The disclosure table and symbols shown below
cover the electronic information product (EIP) supplied.

The two symbols shown below indicate the product is recyclable and the number denotes the
Environmental Friendly Use Period for the EIP indicated above it.

Transceiver module & Accessories

Except Battery

Limitation of Liability

The Products are not designed, intended, or authorized for use as components in systems intended
for surgical implant into the body; in other applications intended to support or sustain life; for the
planning, construction, maintenan ce, operation or use of any nuclear facility; for the flight,
navigation, communication of aircraft or ground support equipment; or in any other application in
which the failure of the Product could create a situation where personal injury or death may occur.
If CUSTOMER should use any Product or provide any Product to a third party for any such use,
CUSTOMER hereby agrees that MOTOROLA is not liable, in whole or in part, for any claims or
damages arising from such use, and further agrees to indemnify and hold MOTOROLA harmless
from any claim, loss, cost or damage arising from such use.

EXCEPT AS SPECIFI CALLY ST ATED ABOVE, THE PRODUCTS ARE PROVIDED "AS IS"
AND MOTOROLA MAKES NO OTHER WARRANTIES EXPRESS, IMPLIED,
STATUTORY, OR OTHERWISE REGARDING THE PRODUCTS. MOTOROLA
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY

xxii G24-L AT Commands Reference Manual April 15, 2008

AND FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF
DEALING OR USAGE OF TRADE.

Under no circumstances shall MOTOROLA be liable to CUSTOMER or any other par t y fo r any
costs, lost revenue or profits or for any other special, incidental or consequential damages, even if

Battery

MOTOROLA has been informed of such potential loss or damage. And in no event shall
MOTOROLA's liability to CUSTOMER for damages of any nature exceed the total purchase
price CUSTOMER paid for the Product at issue in the dispute, except direct damages resulting
from patent and/or copyright infringement, which shall be governed by the "INDEMNITY"
Section of this Agreement.

The preceding states MOTOROLA's entire liability for MOTOROLA's breach or failure to
perform under any provision of this Agreement.

Warranty Notification

Motorola guarantees to you, the original purchaser, the OEM module and accessories which you
have purchased from an authorized Motorola dealer (the "Products"), to be in conformance with
the applicable Motorola specifications current at the time of manufacture for a term of [1] year
from date of purchase of the Product(s) (Warranty Term).

You must inform Motorola of the lack of conformity to the applicable specifications of any of the
Products within a period of two (2) months from the date on which you detect a defect in
material, workmanship or lack of conformity and in any event within a term not to exceed the
Warranty Term, and must immediately submit the Product for service to Motorola's Authorized
Repair or Service Center. Motorola shall not be bound by Product related statements not directly
made by Motorola nor any warranty obligations applicable to the seller.

Preface

A list of the Motorola Call Center numbers is enclosed with this Product.
During the Warranty term, Motorola will, at its discretion and without extra charge, as your

exclusive remedy, repair or replace your Product which does not comply with this warranty; or
failing this, to reimburse the price of the Product but reduced to take into account the use you
have had of the Product since it was delivered. This warranty will expire at the end of the
Warranty Term.

This is the complete and exclusive warranty for a Motorola OEM module and accessories and in
lieu of all other warranties, terms and conditions, whether express or implied.

Where you purchase the product other than as a consumer, Motorola disclaims all other
warranties, terms and conditions express or implied, such as fitness for purpose and satisfactory
quality.

In no event shall Motorola be liable for damages nor loss of data in excess of the purchase price
nor for any incidental special or consequential damages* arising out of the use or inability to use
the Product, to the full extent such may be disclaimed by law.

This Warranty does not affect any statutory rights that you may have if you are a consumer, such
as a warranty of satisfactory quality and fit for the purpose for which products of the same type
are normally used under normal use and service, nor any rights against the seller of the Products
arising from your purchase and sales contract.

(*)including without limitation loss of use, loss of time, loss of data, inconvenience, commercial
loss, lost profits or savings.

How to Get Warranty Service?

In most cases the authorized Motorola dealer which sold and/or installed your Motorola OEM
module and original accessories will honor a warranty claim and/or provide warranty service.
Alternatively, for further information on how to get warranty service please contact either the

April 15, 2008 G24-L AT Commands Reference Manual xxiii

Claiming

Claiming

customer service department of your service provider or Motorola's call Center at
[e-mail].

In order to claim the warranty service you must return the OEM module and/or accessories in
question to Motorola's Authorized Repair or Service Center in the original configuration and
packaging as supplied by Motorola. Please avoid leaving any supplementary items like SIM
cards. The Product should also be accompanied by a label with your name, address, and telephone
number; name of operator and a description of the problem.

In order to be eligible to receive warranty service, you must present your receipt of purchase or a
comparable substitute proof of purchase bearing the date of purchase. The phone should also
clearly display the original compatible electronic serial number (IMEI) and mechanic serial
number [MSN]. Such information is contained with the Product.

You must ensure that all and any repairs or servicing is handled at all times by a Motorola
Authorized Service Center in accordance with the Motorola Service requirements.

In some cases, you may be requested to provide additional information concerning the
maintenance of the Products by Motorola Authorized Service Centers only, therefore it is
important to keep a record of any previous repairs, and make them available if questions arise
concerning maintenance.

Conditions

This warranty will not apply if the type or serial numbers on the Product has been altered, deleted,
duplicated, removed, or made illegible. Motorola reserves the right to refuse free-of-charge
warranty service if the requested documentation can not be presented or if the information is
incomplete, illegible or incompatible with the factory records.

Repair, at Motorola's option, may include reflashing of software, the replacement of parts or
boards with functionally equivalent, reconditioned or new parts or boards. Replaced parts,
accessories, batteries, or boards are warranted for the balance of the original warranty time
period. The Warranty Term will not be extended. All original accessories, batteries, parts, and
OEM module equipment that have been replaced shall become the property of Motorola.
Motorola does not warrant the installation, maintenance or service of the products, accessories,
batteries or parts.

Motorola will not be responsible in any way for problems or damage caused by any ancillary
equipment not furnished by Motorola which is attached to or used in connection with the
Products, or for operation of Motorola equipment with any ancillary equipment and all such
equipment is expressly excluded from this warranty.

When the Product is used in conjunction with ancillary or peripheral equipment not supplied by
Motorola, Motorola does not warrant the operation of the Product/peripheral combination and
Motorola will not honor any warranty claim where the Product is used in such a combination and
it is determined by Motorola that there is no fault with the Product. Motorola specifically
disclaims any responsibility for any damage, whether or not to Motorola equipment, caused in
any way by the use of the OEM module, accessories, software applications and peripherals
(specific examples include, but are not limited to: batteries, chargers, adapters, and power
supplies) when such accessories, software applications and peripherals are not manufactured and
supplied by Motorola.

xxiv G24-L AT Commands Reference Manual April 15, 2008

What is Not Covered by the Warranty

This warranty is not valid if the defects are due to damage, misuse, tampering, neglect or lack of
care and in case of alterations or repair carried out by unauthorized persons.

The following are examples of defects or damage not covered by this product warranty

1. Defects or damage resulting from use of the Product in other than its normal and customary
manner.

2. Defects or damage from misuse, access to incompatible sources, accident or neglect.

3. Defects or damage from improper testing, operation, maintenance, installation, adjustment,
unauthorized software applications or any alteration or modification of any kind.

4. Breakage or damage to antennas unless caused directly by defects in material or
workmanship.

5. Products disassembled or repaired other than by Motorola in such a manner as to adversely
affect performance or prevent adequate inspection and testing to verify any warranty claim.

6. Defects or damage due to range, coverage, availability, grade of service, or operation of the
cellular system by the cellular operator.

7. Defects or damage due to moist, liquid or spills of food.

Preface

8. Control unit coil cords in the Product that are stretched or have the modular tab broken.

9. All plastic surfaces and all other externally exposed parts that are scratched or damaged due

Depending on operating conditions and your usage habits, wear and tear might take place of
components including mechanical problems related to Product housing, paint, assembly, sub­assemblies, displays and keyboards and any accessories which are not part of the Product's in-box
configuration. The rectification of faults generated through wear and tear and the use of
consumable items like batteries beyond their Optimum Performance Time as indicated in the
product manual is considered to be your responsibility and therefore Motorola will not provide
the free Warranty repair service for these items.

Installed Data

Please make and retain a note of all data you have inserted into your product. For example names,
addresses, phone numbers, user and access codes, notes etc. before submitting your product for a
warranty service as such data may be deleted or erased as part of the repair or service process.

Please note if you have downloaded material onto your product, for example ring tones, ring
tunes, screensavers, wallpaper, games, etc. These may be deleted or erased as part of the repair
process or testing process. Motorola shall not be responsible for such m atters. The repair or
testing process should not affect any such material that was installed by Motorola on your product
as a standard feature.

to customer normal use.

Out of Warranty Repairs

If you request Motorola to repair your product any time after the warranty term or where this
warranty does not apply due to the nature of the defect or fault, then Motorola may in its
discretion carry out such repairs subject to you paying Motorola its fees for such a repair or it may
refer you to an authorized third party to carry out such repairs.

April 15, 2008 G24-L AT Commands Reference Manual xxv

Revision History

Revision History

Manual Number

6802983C95-C

Manual Title

G24-L Developer’s Guide: G24-L AT Commands Reference Manual

Version Information

The following table lists the manual version, date of version, and remarks about
the version.

Revision History

Version Date Issue Remarks

A September 25, 2007 Initial Release
B Januaty 15, 2008 Major update that include the following features: TCP/IP and STK

capabilities.

C April 15, 2008 AT Commands added: +MIPODM, +MTKA, +MTTY

AT Command updated: +MMAD

xxvi G24-L AT Commands Reference Manual April 15, 2008

Chapter 1: Product Features

Connectivity Interface

The user can establish two types of connections in order to establish an AT command session with
the G24-L:

• RS232 connection

• USB connection

The user can use either RS232 or USB connections, but not both simultaneously.

GPRS Operation

Overview

The GPRS allows the service subscriber to send and receive data in an end-to-end packet-transfer
mode, without utilizing network resources in circuit-switched mode.

Features and Benefits

GPRS enables the cost-effective and efficient use of network resources for packet mode data
applications:

• Always connected.

• No setup time before data transmission.

• Cost change based on current data communication (not time based).

Technical Description (GPRS – Class B Operation)

The G24-L is attached to both GPRS and other GSM services, but can only operate one set of
services at a time (GPRS or CSD).

The G24-L can activate a GPRS context and at the same time be alerted for an incoming CSD
call.

This functionality is available on the G24-L single serial line by following the steps below:

1. While in GPRS, listen to the RI signal (RS232) for an incoming CSD call ring.

April 15, 2008 G24-L AT Commands Reference Manual 1-1

CSD Operation

2. Upon being interrupted by the RI signal, drop the DTR line to switch to command mode
(depending on the previous DTR configuration: AT&D).

3. Answer the call (suspending the GPRS session).

4. At the end of the call, pull the DTR to resume the GPRS session.

CSD Operation

Overview

GSM CSD bearer service, the most widely used data service, provides non-transparent (error
correction and flow control) data rate of 9.6 kbit/s.

Data transfer over Circuit Switched Data (CSD) is possible. Once the connection is established,
data can be transferred to and from the remote side.

The user should take the CSD call setup time into account.
Network operators charge the user for the call time regardless of data usage.

Features and Benefits

CSD operation enables the terminal to perform a data transfer over a circuit switched link.
It enables the user to:

• Connect to a remote modem without any Internet network involvement.

• Own a real IP address and enable its access by connecting to an external ISP.

The following are examples of standard CSD call uses:

• Connecting an Internet Service Provider (ISP).

• Remotely accessing corporate Intranet via Remote Access Server (RAS).

• User specific protocol, where the user defines both the remote and local sides.

Technical Description

GSM network operators typically support the non-transparent CSD bearer service through a
modem interworking function. This means that a G24-L initiates a data call and the network
routes the call to the modem interworking function, which is located at the Mobile Switching
Center (MSC) of the GSM network. The modem interworking function then dials the number
supplied by the mobile station.

This is different from voice calls, where the GSM network itself routes the call, often to another
mobile station on the same network. The GSM network does not route data calls - it dials the
requested number on behalf of the mobile station and leaves the routing to the external wireline
telephone network. The main reason for this is that the GSM network has information about what
the user wants to do with the data call. For example, the user may be contacting his or her Internet
Service Provider (ISP) to send email or dialing the corporate Intranet to set up a virtual private
network (VPN) connection to retrieve confidential customer information from a company
database.

1-2 G24-L AT Commands Reference Manual April 15, 2008

Improved OEM Features

G24-L contains the following new and improved features:

• SIM Application Toolkit (STK)

• TCP/IP support

• Audio (digital and analog) - path, gain and algorithm

• User-defined profiles

For a full list of G24-L features, refer to the G24-L Module Hardware Description manual.

SIM Application Toolkit (STK)

Overview

The SIM Toolkit (STK, also known as the SIM Application Toolkit or SAT) is a set of
applications operated by the network provider (usually the module's SIM provider). If the STK is
supported and enabled on the mobile side, specific data can be obtained via menu browsing.

Chapter 1: Product Features

Features and Benefits

The G24-L STK enables the terminal to obtain information via menus created by the provider, for
example, "local news" or "weather info". These menus are provider dependent. Enabling the STK
allows the provider to perform other actions regarding call control, SMS etc.

Tech nical Description

The STK supports the specific mechanism(s) that SIM applications require to interact and operate
with the G24-L. Using this mechanism, the SIM can notify the terminal, via the G24-L, that a
specific action is requested. A full list of supported actions is listed in the Proactive SIM section.
For more information regarding the STK mechanism, refer to the GSM 11.11 [20], GSM 11.14
ETSI standards.

Profile Download

Profile downloading provides a mechanism for the G24-L to transmit information describing its
capabilities to the SIM. During the early, profile download phase of the protocol, the G24-L
negotiates and confirms its ability to support the capabilities requested by the STK.

Data Transfer into the SIM

STK data transfer uses the short message service (SMS) as a transfer layer.

April 15, 2008 G24-L AT Commands Reference Manual 1-3

Improved OEM Features

Set up Idle Mode Text

The proactive SIM mechanism enables the SIM to initiate actions to be handled by the G24-L.
Using this service, the SIM can inform the G24-L that it has information pending for action. The
SIM can issue a variety of protocol commands through this mechanism, for example:

• Displaying text

• Sending a short message

• Setting up a voice call to a number held by the SIM

• Setting up a data call to a number whose bearer capabilities are held by the SIM

• Sending an SS control or USSD string

• Playing a tone

• Initiating a dialogue with the user (get inkey, get input)

• Providing local information from the G24-L to the SIM

• Profile download

• Send DTMF

• Set up idle text mode

• Launch browser

• Set up event list

Menu Selection

The SIM supplies a set of possible menu entries via a proactive SIM command. The menu
selection mechanism is used to transfer the SIM application menu item selected by the user to the
SIM and then via SMS to the provider.

Call Control by SIM

When this service is activated by the SIM, all dialed digit strings, supplementary service control
strings and USSD strings are first passed to the SIM before the G24-L sets up the call, the
supplementary service operation or the USSD operation. The SIM has the ability to allow, disable
or modify the call. The STK has the ability to replace a call request, a supplementary service
operation or a USSD operation with another call, for example, a call request by the G24-L can be
diverted to a different destination.

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Chapter 1: Product Features

World Wide

Web

GSM/

Gateway

G24-L

Ter m in a l

RS232

PPP Connection

GPRS

Signaling

GPRS

TCP/UDP IP

Connection

Internet Site

www...

AT Commands

TCP/UDP IP Connection

Overview

The network capabilities are achieved by using different layers of connections. Every layer of
connections provides basic connections to the layer above it. The higher the layer is, the more
capabilities it can provide.

Figure 1-1: System Overview

The three layers of connections are:

• Physical links

• Point-to-point links

• TCP/UDP links

TCP/IP

When establishing the TCP/IP connection the G24-L can only be the "initiator". The TCP/IP
feature enables the G24-L to be a wireless end point for a TCP/IP socket.

Note: The TCP protocol use the value TTL (Time to live) = 64.

Creating TCP/IP Connections

Connection from the G24-L to the Web
The following occurs when creating a TCP/IP connection from the G24-L to the Web:

1. The G24-L connects to the GPRS network and receives an IP address (using the +MIPCALL
command).

April 15, 2008 G24-L AT Commands Reference Manual 1-5

Improved OEM Features

2. The G24-L opens a TCP/IP stack as one of its "sockets" (it must know the target’s IP address

3. Once the connection is established, data is transferred freely in both directions (up load and

Connection with another G24-L using the "GPRS Manager"
The following occurs when creating a TCP/IP connection with another G24-L using the "GPRS

Manager":

1. The OEM on the target side (server) uses the "GPRS Manager" application. When using this

2. The target side activates the "server application" (The term "server application" means an

3. After connecting to the GPRS network, the "server" sends its IP address to the G24-L using

4. The server application listens on a known port, waiting for G24-L to connect.

5. The G24-L connects to the same GPRS network as the server, and receives an IP address

6. The G24-L initiates a TCP/IP connection with the listening "server". (It knows the IP

and port number).

download).

application the TCP/IP is external to the OEM. (External TCP stack is used).

application that has the ability to listen on a given IP address and port number).

an alternative connection (for example, CSD, SMS and so on).

(using the +MIPCALL command).

address and port number of the server).

7. Once the server is connected, the TCP/IP connection is created and data can be transferred
freely in both directions (upload and download).

UDP/IP

The set of AT commands created for the TCP/IP connection is used for the UDP/IP connection as
well. Therefore, UDP/IP must open a UDP stack using the MIPOPEN AT command. The
connection created does not change any concept regarding the
UDP/IP known protocol (which is connectionless), this is just an easy way for the terminal to
specify to the G24-L which of the four possible stacks should be used.

When establishing the UDP/IP connection, the G24-L is both the "initiator" and the "listener".

Creating UDP/IP Connections

Connection with another G24
The following occurs during a UDP/IP connection with another G24:

1. Side A:

– The G24-L connects to the GPRS network and receives an IP address (using the

+MIPCALL command).

– The G24-L opens a UDP/IP stack as one of its "sockets" (using the +MIPOPEN and

selecting the protocol UDP).

2. Side B:

– The G24-L connects to the GPRS network and receives an IP address (using the

+MIPCALL command).

– The G24-L opens a UDP/IP stack as one of its "sockets" (using the +MIPOPEN and

selecting the protocol UDP).

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Chapter 1: Product Features

3. Side A and B previously agree on a port number, and exchange their given IP addresses via
other means of connection (SMS, CSD, Voice, DB and so on).

4. The G24-L sends and receives data to and from the targeted site as it knows the IP address
and port number of the target.

5. Sending (accumulating) data is done using the +MIPSEND command.

6. Actual send is done using the +MIPPUSH command, by specifying the IP address and port
number of the destination.

Note: Every +MIPPUSH sets the destination IP address and destination port number for the

current and future transactions. These values are used for the next push if not explicitly

overwritten.
Connection from the G24-L (client/server) to WEB (client/server)
The following occurs when creating a UDP/IP connection from the G24-L (client/server) to WEB

(client/server):

1. Client side:

– The G24-L client connects to the GPRS network and receives an IP address (using the

+MIPCALL command).

– The G24-L opens a UDP/IP stack as one of its "sockets" (using the +MIPOPEN and

selecting the protocol UDP).

2. The G24-L sends data to the Website, as the Web site’s IP address is known and is public,
and the port number is previously agreed upon.

3. Sending (accumulating) data is done by the +MIPSEND command.

4. Actual send is done by the +MIPPUSH command by specifying the Website IP address and
Website port number.

5. Server side:

– After receiving the first packet from the client, the server knows the IP address and port

number of the G24-L.

– The IP address and port number for the specific mobile G24-L should be saved in the DB.

Note: Every +MIPPUSH sets the destination IP address and destination port number for the

current and future transactions. These values are used for the next push if not explicitly
overwritten.

Features and Benefits

The TCP/UDP IP feature provides the terminal with the following benefits:

• Up to four simultaneous protocol connections.

• Ability to pass data via the protocol stack using AT commands (command mode). This

relieves the terminal from switching the RS232 to "binary mode" and back to "command
mode".

• Ability to use UDP and TCP simultaneously.

• No need for protocol support from the terminal - only data sending and receiving.

• Reduced memory utilization. The G24-L manages the protocol stack and therefore saves

terminal memory.

• Ability to receive the incoming TCP connections.

• Ability to accept IP connections only if the IP belongs to a defined IP white list.

April 15, 2008 G24-L AT Commands Reference Manual 1-7

Improved OEM Features

Tech nical Description

Figure 1-1, “System Overview,” on page 1-5 displays the system overview which comprises the

following links and layers:
Physical layer links:

• The terminal is connected to the G24-L using a physical RS-232 connection.

• The G24-L is connected to the GGSN using a GPRS link.

• The GGSN is connected to the Internet via some sort of physical connection (usually

Point-to-point layer links:

• AT command protocol is used to transfer data between the terminal and the G24-L.

• After authentication, the G24-L is linked to the GGSN using PPP protocol.

• The GGSN is connected to its Internet service provider using some protocol.

TCP / UDP layer:

• The G24-L can transfer data with the WEB using either TCP/IP or UDP/IP protocols.

• The protocol stacks in the terminal or in the OEM must be managed when using TCP/IP or

telephone or cable).

UDP/IP protocols. The G24-L software can manage these stacks internally. This enables the
G24-L to relieve the terminal from the job of managing these protocols.

Note: Currently, the embedded TCP/IP feature may be used only for mobile-initiated

connections. The embedded. TCP/IP feature cannot listen on a port for incoming
connections.

Audio

Overview

The audio (digital and analog) feature in the G24-L module involves three main issues: path
(routes the current input and output devices), gain (volume management) and algorithm. For
more information, refer to “Audio” on page 3-155.

Features and Benefits

The following algorithm related features are provided:

Sidetone

Sidetone reduces the microphone audio input that is routed to the selected speaker so that the
person speaking can hear himself or herself talking. This creates a slight echo because the speaker

1-8 G24-L AT Commands Reference Manual April 15, 2008

Chapter 1: Product Features

1

2

Mic

Spkr

Mic

Spkr

Echo

G24-L

Remote

1

5

Mic

Out In

Out line is filtered
by In line

Spkr

3

4

2

Problem

Loop

1

2 3 4 5

Solution

(

(

4

3 1

Suppression

sound then gets picked up again by the microphone and is again routed to the speaker, and so on.
Echo suppress is designed to take care of this echo.

Figure 1-2: Sidetone

Echo Suppression

Echo suppression suppresses a large amount of the output sound picked up by the input device
(cancels all echoes).

Figure 1-3: Echo Suppression

Noise Suppress

Noise suppression improves audio quality in all modes by suppressing environ men t noise from
being picked up by the input device.

Tech nical Description

The path features provide full control over the navigation of the audio in the product.

April 15, 2008 G24-L AT Commands Reference Manual 1-9

The gain features provide full control over the volume levels of the different output accessories
and tones.

Improved OEM Features

The algorithm provides full control over activation/deactivation of audio quality features such as
echo canceling and noise suppression.

The user can access these features by means of AT commands. These are described later in this
document.

1-10 G24-L AT Commands Refer ence Manual April 15, 2008

Short Message Service (SMS)

Overview

The SMS feature provides means for SMS messages handling and the reporting of SMS reception
events.

G24-L SMS implementation is based on the GSM 07.05 specification.

Features

The SMS, as defined within the GSM 900/1800/1900 digital mobile phone standard:

• A single short message can be up to 160 characters of ASCII text in length (7-bit coded).

Message text can comprise words, numbers or an alphanumeric combination.

• Short messages can be written and displayed in various coding schemes, including ASCII

and UCS2.

• Reception of an incoming message can invoke an indication to the terminal. This feature is

configurable using the command AT+C NMI. Short messages received during data calls are
not indicated.

• Short messages can be sent and received simultaneously with GSM voice, data and fax calls.

• Cell broadcast messages can also be selected and received on the G24-L. The G24-L enables

registration to specific broadcast channels.

Chapter 1: Product Features

April 15, 2008 G24-L AT Commands Reference Manual 1-11

Short Message Service (SMS)

Technical Description

The G24-L memory for incoming short messages is SIM-dependent. A new incoming message is
saved in the first free memory location, from index 1, according to the SIM card.

The G24-L memory can contain up to 73 outgoing and CB messages. A new outgoing message is
saved in the next free memory location, from index 101 up to index 352.

Incoming messages 1 SIM-dependent

SMS Type SMS Index Max Number of SMS

2
...
20

Outgoing and CB
messages

21 250
22
...
270

1-12 G24-L AT Commands Refer ence Manual April 15, 2008

Character Sets

The following includes the references to various tables that provide conversions between the
different character sets.

• CS1 - GSM to UCS2.

• CS2 - ASCII to/from UTF8.

• CS3 - UCS2 to/from UTF8.

For the full content of a specific conversion table, refer to Appendix A, Character Set Tables.

ASCII Character Set Management

The ASCII character set is a standard seven-bit code that was proposed by ANSI in 1963, and
finalized in 1968. ASCII was established to achieve compatibility between various types of data
processing equipment.

GSM Character Set Management

Chapter 1: Product Features

In G24-L, the GSM character set is defined as octant stream. This means that text is displayed not
as GSM characters but in the hex values of these characters.

UCS2 Character Set Management

UCS2 is the first officially standardized coded character set, eventually to include the characters
of all the written languages in the world, as well as all mathematical and other symbols.

Unicode can be characterized as the (restricted) 2-octet form of UCS2 on (the most general)
implementation level 3, with the addition of a more precise specification of the bi-directional
behavior of characters, as used in the Arabic and Hebrew scripts.

The 65,536 positions in the 2-octet form of UCS2 are divided into 256 rows with 256 cells in
each. The first octet of a character representation denotes the row number, the second the cell
number. The first row (row 0) contains exactly the same characters as ISO/IEC 8859-1. The first
128 characters are thus the ASCII characters. The octet representing an ISO/IEC 8859-1 character
is easily transformed to the representation in UCS2 by placing a 0 octet in front of it. UCS2
includes the same control characters as ISO/IEC 8859 (also in row 0).

UTF-8 Character Set Management

UTF-8 provides compact, efficient Unicode encoding. The encoding distributes a Unicode code
value's bit pattern across one, two, three, or even four bytes. This encoding is a multi-byte
encoding.

UTF-8 encodes ASCII in a single byte, meaning that languages using Latin-based scripts can be
represented with only 1.1 bytes per character on average.

UTF-8 is useful for legacy systems that want Unicode support because developers do not have to
drastically modify text processing code. Code that assumes single-byte code units typically does
not fail completely when provided UTF-8 text instead of ASCII or even Latin-1.

April 15, 2008 G24-L AT Commands Reference Manual 1-13

Character Sets

Unlike some legacy encoding, UTF-8 is easy to parse. So-called lead and trail bytes are easily
distinguished. Moving forwards or backwards in a text string is easier in UTF-8 than in many
other multi-byte encoding.

The codes in the first half of the first row in Character Set Table CS2 (UTF-8 <-> ASCII) are
replaced in this transformation format by their ASCII codes, which are octets in the range
between 00h and 7F. The other UCS2 codes are transformed to between two and six octets in the
range between 80h and FF. Text containing only characters in Character Set Table CS3
(UTF-8 <-> UCS-2) is transformed to the same octet sequence, irrespective of whether it was
coded with UCS-2.

8859-1 Character Set Management

ISO-8859-1 is an 8 bit character set - a major improvement over the plain 7 bit US-ASCII.
Characters 0 to 127 are always identical with US-ASCII and the positions 128 to 159 hold some

less used control characters. Positions 160 to 255 hold language-specific characters.
ISO-8859-1 covers most West European languages, such as French (fr), Spanish (es), Catalan

(ca), Basque (eu), Portuguese (pt), Italian (it), Albanian (sq), Rhaeto-Romanic (rm), Dutch (nl),
German (de), Danish (da), Swedish (sv), Norwegian (no), Finnish (fi), Faroese (fo), Icelandic (is),
Irish (ga), Scottish (gd) and English (en). Afrikaans (af) and Swahili (sw) are also included,
extending coverage to much of Africa.

1-14 G24-L AT Commands Refer ence Manual April 15, 2008

AT Commands Summary

The following list contains a summary of all the G24-L AT commands sorted by functionality.

AT Command Description Page

Modem ID

Subscriber Unit Identity

Chapter 1: Product Features

Table 1-1: AT Commands

+CGMI This command displays manufacturer identification.
+GMI This command displays manufacturer identification.
+FMI This command displays manufacturer identification.
+CGMM This command displays the model identification.
+GMM This command displays the model identification.
+FMM This command displays the model identification.
+CGMR This command displays the revision identification.
+GMR This command displays the revision identification.
+FMR This command displays the revision identification.
+CGSN This command displays the product serial number identification.
+GSN This command requests the product serial number identification.
+CSCS This command selects the G24-L character set.
+CIMI This command displays the International Mobile Subscriber Identity

number.

+CFSN

I This command displays various G24-L information items.

This command is used to query the manufacturing serial
number

.

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+CNUM This command displays up to five strings of text information that

$ This command displays a list of all the AT commands supported by

+CLAC This command displays a list of all the AT commands supported by

Call Control

Call Control Commands
D This command places a voice call on the current network, when

D> This command places a voice/fax/data call on the current network

April 15, 2008 G24-L AT Commands Reference Manual 1-15

Page 3-6

identify the G24-L.

Page 3-7

the G24-L.

Page 3-8

the G24-L.

Page 3-11

issued from an accessory device.

Page 3-12

by dialing directly from the G24-L phone book.

AT Commands Summary

AT Command Description Page

Table 1-1: AT Commands (Cont.)

DL This command places a voice call to the last number dialed.
H This command hangs up, or terminates a particular call.
A This command answers a n incoming call, pl acing the G24-L into the

appropriate mode, as indicated by the RING message.

+CRC This command controls whether to present the extended format of

the incoming call indication.

RING This unsolicited event is received when an incoming call (voice,

data or fax) is indicated by the cellular network.

+CRING This unsolicited event indicates the type of inco mi ng call.
+CLIP This command controls the Calling Line Identity (CLI) presentati on

to the terminal when there is an incoming call.

+CCWA This command controls the Call Waiting supplementary service,

including settings and querying of the network by the G24-L.

+CHLD This command controls the Call Hold and Multiparty Conversation

supplementary services.

+CCFC This command controls the call-forwarding supplementary service.
+CLIR This command enables/disables the sending of caller ID information

to the called party, for an outgoing call.

+CBST This command handles the selection of the bearer service and the

connection element to be used when data calls are originated.

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O This command returns a phone to the Online Data mode and issues a

CONNECT or CONNECT <text> result code.

&Q This command selects the asynchronous mode, and has no effect.
+CHUP This command causes the G24-L to hang up the current GSM call.
+CSNS This command handles the selection of the bearer or teleservice to

be used when a mobile terminated single numbering scheme call is
established.

+MDC This command enables you to select the desired messages to be

displayed upon connection of a voice call with a remote party.

+CTFR1 This command terminates an incoming call and diverts the caller to

the number previously defined in CCFC, or to a voice mail if one
exists for the subscriber.

+MVC

This AT command is used to choose and configure the
priority order of the supported voice codecs (vocoders).

+MTTY This command is used to enable/disable the TTY (Te le Typewriter)

support in the G24-L.

Call Status Messages
+CPAS This command displays the current activity status of the G24-L, for

example, call in progress, or ringing.

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1-16 G24-L AT Commands Refer ence Manual April 15, 2008

Chapter 1: Product Features

Table 1-1: AT Commands (Cont.)

AT Command Description Page

+CLCC This command displays a list of all current G24-L calls and their

statuses, and also enables/disables the unsolicited indication of the
call list.

+MCST This command displays the current state of the call processing, and

also enables/disables the unsolicited indication of any change in the
call processing state.

Call Advice of Charge Messages
+CAOC This command displays information about the cost of calls.

+CACM This command resets the Advice of Charge accumulated call meter

value in the SIM file, EFACM.

+CAMM This command sets the Advice of Charge accumulated call meter

maximum value in the SIM file, EFACMmax.

+CPUC This command sets the parameters of the Advice of Charge-related

price per unit and currency table found in the SIM file, EFPUCT.

+CR This command controls whether or not the extended format of an

outgoing call is displayed or not.

Supplementary Services
+CSSN This command handles the enabling and disabling of supplementary

service-related, network-initiated, notifications.

+CUSD This command allows control of Unstructured Supplementary

Service Data (USSD), according to GSM 02.90.

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+COLP This command refers to the GSM supplementary service COLP,

Connected Line Identification Presentation, which enables a calling
subscriber to get the connected line identity (COL) of the called
party after setting up a mobile-originated call.

Phone Books and Clock

Directory Access Commands
+CPBS This command handles the selection of the memory to be used for

reading and writing entries in G24-Ls that contain more than one
phone book memory.

+CPBR This command recalls phone book entries from a specific entry

number, or from a range of entries.

+CPBF This command searches the currently active phone book for a

particular entry, by name.

+CPBW This command stores a new entry in the phone book, or deletes an

existing entry from the phone book.

+CSVM This command handles the selection of the number to the voice mail

server.

+MDSI This command enables unsolicited reporting of indications of SIM

deactivation and invalidation.

+MCSN This command sets EFmsisdn in the SIM.

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April 15, 2008 G24-L AT Commands Reference Manual 1-17

AT Commands Summary

AT Command Description Page

System Date and Time Access Commands

Table 1-1: AT Commands (Cont.)

+CCLK This command reads/sets the G24-L's current date and time settings.
SMS

SMS Commands
+CSMS This command handles the selection of the SMS message service

type.

+CPMS This command handles the selection of the preferred storage area for

messages.

+CMGF This command handles the selection of message formats.
+CSCA This command handles the selection of the SCA and the TOSCA.
+CSMP This command sets the Text Module parameters.
+CSDH This command shows the Text Mode parameters.
+CNMI This command sends an unsolicited indication when a new SMS

message is received by the G24-L.

+CNMA This command acknowledges the receipt of a +CMT response.
+CMTI This unsolicited message, including the SMS message index, is sent

upon the arrival of an SMS message.

+CMT This unsolicited message displays the received SMS-DELIVER

message.

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+CDSI

This unsolicited message indicates that a new
SMS-ST ATUS-REPORT message was received, and is stored
in location <index>.

+CDS

This unsolicited message displays the received
SMS-DELIVER message.

+CMGL This command displays a list of SMS messages stored in the G24-L

memory.

+MMGL This command disp lays a list of SMS mess ag es st ored in th e G24-L

memory.

+CMGR This command reads selected SMS messages from the G24-L

memory.

+MMGR This command reads selected SMS messages from the G24-L

memory.

+MMAR This command changes the status of an SMS message in the G24-L

memory from "REC UNREAD" to "REC READ".

+CMSS This command selects and sends pre-stored messages from the

message storage.

+CMGW This command writes and saves messages in the G24-L memory .
+CMGD This command deletes messages from the G24-L memory.

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1-18 G24-L AT Commands Refer ence Manual April 15, 2008

Chapter 1: Product Features

Table 1-1: AT Commands (Cont.)

AT Command Description Page

+CGSMS This command handles the selection of the service or service

preference used by the G24-L to send mobile-originated SMS
messages.

+CMGS This command sends an SM from the G24-L to the network.
+MCSAT This command enables/disables/exercises SMS alert tone for an

arriving SMS.

Network

Network Commands
+CSQ This command displays the signal strength received by the G24-L.

+CRLP This command displays the Radio Link Protocol parameters.
+CREG This command enables/disables the network status registration

unsolicited result code.

+CGREG This command enables/disables the GPRS network status

registration unsolicited result code.

+COPS This command enables accessi ng the network registration

information, as well as select and register the GSM network
operator.

+CPOL This command is used to edit the list of preferred operators located

in the SIM card.

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+MFS This command is used to determine how long the G24-L waits

before attempting to re-register after a registration attempt has failed
and the G24-L is not registered.

Hardware Information

Hardware Information Commands
+CBC This command queries the battery charger connection.

+MBC

This command allows the battery charger to be managed
(start, stop or automatic manage) and get indication for the
battery level (solicited or unsolicited reports).

+CBAUD This command sets the baud rate.
+IPR This command is responsible for setting and saving the request baud

rate.

+MTDTR This command checks and displays the physical current status of the

DTR pin of the RS232.

+MTCTS This command sets the CTS pin of the RS232 to not active (high),

waits one second and then sets the CTS to active (low).

&K This command configures the RTS/CTS flow control.
&C This command determines how the state of the DCD line relates to

the detection of the received line signal from the distant end.

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April 15, 2008 G24-L AT Commands Reference Manual 1-19

AT Commands Summary

AT Command Description Page

Table 1-1: AT Commands (Cont.)

&D This command determines how the G24-L responds when the DTR

(Data T erminal Ready) status is changed from ON to OFF during the
online data state.

+MCWAKE This command displays reports on the status of the GPRS/GSM

coverage.

+MGGIND This command configures the service indicator on pin 49 of the 70

pin connector to be GPRS or GSM.

+CFUN This command shuts down the phone functionality of smart phones

and PDAs with phone capabilities.

+ICF This command determines the local serial port start/stop

(asynchronous) character framing used by the DCE when accepting
DTE commands and transmitting information text and result codes.

S97 This command indicates whether an antenna is physically connected

to the G24-L RF connector.

+MRST This command enables customer software to perform a hard reset to

the G24-L unit.

+MIOC
+MIOD
+MMAD This command reads and monitors digital value from a specified

This command defines the G24-L 8 GPIO pins data value. Page 3-144
This command defines the G24-L 8 GPIO pins configuration. Page 3-147

ADC.

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+MPCMC This command defines whether the PCM clock is generated

continuously or not, when module is in digital audio mode.

Audio

Basic Audio Setup Commands
+CRSL This command handles the selection of the incoming call ringer and

alert tone (SMS) sound level on the alert speaker of the G24-L.

+CLVL This command sets the volume of the internal loudspeaker (which

also affects the key feedback tone) of the G24-L.

+CMUT This command mutes/unmutes the currently active microphone path

by overriding the current mute state.

S94 This S-parameter represents the Boolean status, On/Off, of the

sidetone feature.

S96 This S-parameter represents the Boolean status, On/Off, of the echo

cancelling feature in the handsfree.

Advanced Audio Setup Commands
+MAPATH This command sets/requests the active input accessory, and the

output accessory for each feature.

+MAVOL This command determines a volume setting for a particular feature

in a particular accessory.

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Chapter 1: Product Features

Table 1-1: AT Commands (Cont.)

AT Command Description Page

+MAMUT This command controls the muting/unmuting of all input paths

(MIC, HDST_MIC, DIGITAL_RX).

+MAFEAT This command controls the various algorithm features, such as

sidetone, echo cancel and noise suppress.

General Audio Commands
+MADIGITAL This command switches between analog and digital audio modes.

+CALM This command handles the selection of the G24-L’s alert sound

mode.

+MMICG This command handles the selection of microphone gain values.
+CRTT This command plays one cycle of a ring tone, stops the cycle in the

middle, and sets the ring tone to be used.

+VTD This command handles the selection of tone duration.
+VTS This command transmits a string of DTMF tones when a voice call

is active.

Access

Access Control Commands
A/ This command repeats the last command en tered on the terminal.

AT This command checks the AT communication and only returns OK.

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+CPIN This command is only relevant for phones that use SIM cards. It

unlocks the SIM card when the proper SIM PIN is provided, and
unblocks the SIM card when the proper SIM PUK is provided.

+EPIN This command is only relevant for phones that use SIM cards. It

verifies the PIN2 indicator.

+TPIN This command queries the number of remaining SIM PIN/PUK

entering attempts.

+CPWD This command sets a new password for the facility lock.
+CLCK This command locks, unlocks or interrogates a G24-L or a network

facility <fac>.

+EMPC

This command unlocks or resets the first PLMN of the
inserted SIM.

Modem Configuration and Profile

Modem Register Commands
V This command determines the response format of the data adapter

and the contents of the header and trailer transmitted with the result
codes and information responses.

Q This command determines whether to output/suppress the result

codes.

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April 15, 2008 G24-L AT Commands Reference Manual 1-21

AT Commands Summary

AT Command Description Page

Table 1-1: AT Commands (Cont.)

E This command defines whether the G24-L echoes the characters

received from the user, (whether input characters are echoed to
output).

X This command defines the data adaptor response set, and the

CONNECT result code format.

Sn This command reads/writes values of the S-registers, and includes

registers 1-49, 94, 96 (Audio) and 102 (Sleep mode).

\S This command displays the status of selected commands and

S-registers.

\G This command sets the use of the software flow control.
\J This command adjusts the terminal auto rate.
\N This command displays the type of link.
+CBAND This command is supported for backward compatibility only, and

has no effect.

? This command displays the most recently updated value stored in

the S-register.

&F This command restores the factory default configuration profile.
Z This command resets the default configuration.
Sleep Mode Commands

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S24 This S-parameter activates/disables the Sleep mode. If the parame ter

value is greater than 0, it represent the number of seconds till the
G24-L enters sleep mode.

S102 This S-register sets the v alue of the delay before sending the data to

the terminal.

+MSCTS This command defines the behavior of the CTS line when the G24-L

is in Sleep mode.

Error Handling Commands
+CMEE This command enables/disables the use of result code +CME

ERROR: <err> as an indication of an error relating to the
functionality of the G24-L.

+CEER This command returns an extended error report containing one or

more lines of information text, determined by the manufacturer,
providing the reasons for the
call-clearing errors.

User Interface
+CRSM This command provides limited access to the Elementary Files on

the SIM.

&V This command displays the current active configuration and stored

user profiles.

&W This command stores the user profile.

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Chapter 1: Product Features

Table 1-1: AT Commands (Cont.)

AT Command Description Page

&Y This command displays the default user profile.
+CMER This command enables an external accessory to receive key press

information from the G24-L’s internal keypad.

+CLAN This command handles the selection of language in the ME.
+CIND This command is used to query the status of various ME indicators.
Unsolicited UI Status Messages
+CIEV An unsolicited indication regarding various phone indications that is

sent to the DTE when the <ind> parameter of the +CMER command
is set to 1.

GPRS

GPRS Commands
+CGCLASS This command sets the GPRS mobile station class.

+CGDCONT This command specifies the PDP (Packet Data Protocol) context.
+CGQMIN This command sets the minimum acceptable quality of service

profile.

+CGQREQ This command displays the requested quality of service profile.
+CGATT This command attaches the G24-L to the GPRS network.
+CGPADDR This command reads the allocated PDP addresses for the specified

context identifiers.

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+MGEER This command returns the PDP context activation reject cause.
D*99 This command enables the ME to pe rform the actions necessary for

establishing communication between the terminal and the external
PDN.

+CGPRS This command indicates whether there is GPRS coverage.
+CGACT This command activates/deactivates the PDP Context.
STK Commands

+MTKR This command displays the profile that is downloaded from the

G24-L to the SIM during the SIM initializatio n process.

+MTKE This command enables/disables the SIM ToolKit functionalities.
+MTKP This is both a command and an unsolicited event. The command

responds to an unsolicited event.

+MTKM This is both a command and an unsolicited event. The command

selects items from the menu.

+MTKC This unsolicited event notifies the terminal when supplementary

services, SMS Control or Call Control are modified.

+MTKA This command sends acknowledge response from the user (TE) to

the STK.

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April 15, 2008 G24-L AT Commands Reference Manual 1-23

AT Commands Summary

AT Command Description Page

TCP/IP Commands

Table 1-1: AT Commands (Cont.)

+MIPCALL This command creates a wireless PPP connection with the GGSN,

and returns a valid dynamic IP for the G24-L.

+MIPOPEN This command causes the G24-L to initialize a new socket and open

a connection with a remote side.

+MIPODM This command causes the G24-L to initialize a new socket in Online

Data Mode and open a connection with a remote side.

+MIPCLOSE This command causes the G24-L to free the socket accumulating

buffer and disconnect the G24-L from a remote side.

+MIPSETS This command causes the G24-L to set a watermark in the

accumulating buffer. When the watermark is reached, data is pushed
from the accumulating buffer into the protocol stack.

+MIPSEND This command causes the G24-L to transmit the data that the

terminal provides, using an existing protocol stack.

+MIPPUSH This command causes the G24-L to push the data accumulated in its

accumulating buffers into the protocol stack.

+MIPFLUSH This command causes the G24-L to flush (delete) data accumulated

in its accumulating buffers.

+MIPRUDP This unsolicited event is sent to the terminal when data is received

from the UDP protocol stack.

+MIPRTCP This unsolicited event is sent to the terminal when data is received

from the TCP protocol stack.

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+MIPSTAT This unsolicited event is sent to the terminal indicating a change in

link status.

+MIPXOFF This unsolicited even t is sent to the terminal to stop sending data.
+MIPXON This unsolicited event is sent to the terminal when the G24-L has

free memory in the accumulating buffer.

+MIPCONF Configure Internal TCP/IP stack.
+MPING This command will allow verifying IP connectivity to another

remote machine (computer) by sending one or more Internet Control
Message Protocol (ICMP) Echo Request messages.

+MPINGSTAT This is the unsolicited response that the G24-L sends to the terminal

to inform of ping execution status update and provide summary
statistics of ping request when ping request execution is completed.

+MSDNS This command sets/reads DNS IP address for each socket.
+MIPCFF This command sets the Filtering Li st ..
NOP Compatible

Ignored (Compatible Only) Commands
%C This command is supported for backward compatibility only, and

has no effect.

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Chapter 1: Product Features

Table 1-1: AT Commands (Cont.)

AT Command Description Page

&G This command is supported for backward compatibility only, and

has no effect.

&J This command is supported for backward compatibility only, and

has no effect.

&L This command is supported for backward compatibility only, and

has no effect.

&M This command is supported for backward compatibility only, and

has no effect.

&P This command is supported for backward compatibility only, and

has no effect.

&Q This command is supported for backward compatibility only, and

has no effect.

&R This command is supported for backward compatibility only, and

has no effect.

&S This command is supported for backward compatibility only, and

has no effect.

&T This command is supported for backward compatibility only, and

has no effect.

\B This command is supported for backward compatibility only, and

has no effect.

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\A This command is supported for backward compatibility only, and

has no effect.

\K This command is supported for backward compatibility only, and

has no effect.

F This command is supported for backward compatibility only, and

has no effect.

L This command is supported for backward compatibility only, and

has no effect.

M This command is supported for backward compatibility only, and

has no effect.

N This command is supported for backward compatibility only, and

has no effect.

P This command is supported for backward compatibility only, and

has no effect.

T This command is supported for backward compatibility only, and

has no effect.

Y This command is supported for backward compatibility only, and

has no effect.

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April 15, 2008 G24-L AT Commands Reference Manual 1-25

AT Commands Summary

1-26 G24-L AT Commands Refer ence Manual April 15, 2008

Chapter 2: Introduction to AT Commands

AT Commands Overview

AT commands are sets of commands used for communication with the G24-L cellular modem.
AT commands are comprised of assemblies of ASCII characters which start with the "AT" prefix

(except the commands A/ and +++). The AT prefix is derived from the word Attention, which
asks the modem to pay attention to the current request (command).

AT commands are used to request services from the G24-L cellular modem, such as:

• Call services: dial, answer and hang up

• Cellular utilities: send/receive SMS

• Modem profiles: Auto Answer

• Cellular Network queries: GSM signal quality

General Symbols Used in AT Commands Description

The following syntax definitions apply in this chapter:

Syntax Definition

<CR>
<LF>
<...>

[...]

//

April 15, 2008 G24-L AT Commands Reference Manual 2-1

Carriage return character, specifi ed by the va lue of the S3-register.
Line-feed character, specified by the value of the S4-register.
Name enclosed in angle brackets is a syntax element. The brackets themselves do not

appear in the command line.
Optional sub-parameter of a command or an optional part of terminal information

response, enclosed in square brackets. The brackets themselves do not appear in the
command line. When the sub-parameter is not provided in the parameter type
commands, the new value equals its previous value. In action type commands, the
action should be performed on the basis of the recommended default setting of the
sub-parameter.

Denotes a comment, and should not be included in the command.

AT Commands Protocol

Command

Terminal

G24-L

N

M

Response

ResultsCode

Indications

N=0,1,...,

K

M=0,1,...,

L

General System Abbreviations

The basic system configuration contains a modem and a terminal.
The G24-L is the modem and may be referred to as the DCE, the phone, the mobile or the radio.
The terminal may be referred to as the DTE or the TE.

AT Commands Protocol

The figure below shows a general messaging sequence of AT commands protocol between the
terminal and the G24-L.

Figure 2-1: AT Commands Protocol

The AT commands interface is basically a Modem Services Upon Request.
Communication (almost) always begins from the terminal side. This means that any service

should be requested from the terminal. Thus a request is called a "command".
Each command must be answered by a "results code" from the G24-L. The results code reports

the command status to the terminal.
Some commands may include several "Response" requests (between 0 to K) to send data back to

the terminal.
Some commands may initiate a mode in which, when specified events are generated in the

G24-L, "Indicator" messages are sent asynchronously. Indicators can be between 0 to L.
The G24-L can echo characters received from the terminal (commands) back to the terminal.

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Chapter 2: Introduction to AT Commands

ATCMD1 CMD2=12; +CMD1; +CMD2=,,15; +CMD2?; +CMD2=?<CR>

Command

line prefix

Basic command

(no + prefix)

Subparameters
may be omitted

Extended command

(prefixed with +)

Test command for checking

possible subparameter values

Extended commands are

delimited with semicolon

Command line

termination character

Subparameter

Read command for checking
current subparameter values

AT Commands Structure

Command Structure

An AT command line may contain one or more commands. Delimiters are used to separate the
commands from each other, according to the following structure:

Prefix Command1 Delimiter Command2 Delimiter … CommandN Suffix

Each AT command has the "AT" prefix string.
Each AT command has the suffix <CR>.
The delimiter is either a semicolon ";" or none, meaning space (basic commands).

Each AT command has the following structure:

Token Mode Arguments

The following figure outlines the basic structure of an AT command line:

Figure 2-2: Basic Structure of a Command Line

The following rules must be observed when issuing a command line to the modem:

• Every command line must begin with the letters AT.

• Several commands can be concatenated as one line, as long as the total line does not exceed

140 characters with semicolon characters.

• Characters:

Spaces are ignored. You can leave spaces between each command and between characters of a
command. You can also incl ude punctuation in telephone numbers, and type commands in either
UPPERCASE or lowercase. For example, the following commands are identical:

ATDT8005551234 < Enter > or
atdt [phone] < Enter >
Backspace <S5> character is allowed.

• To cancel a dialing command in progress, send any ASCII character to the modem.

• To execute the command line, send the <CR> ASCII character.

April 15, 2008 G24-L AT Commands Reference Manual 2-3

AT Commands Structure

<CR><LF>+CMD2: 3,0,15,"GSM"<CR><LF>
<CR><LF>+CMD2: (0-3),(0,1),(0-12,15),("GSM","IRA")<CR><LF>
<CR><LF>OK<CR><LF>

Information Response to + CMD2?

Final result code

Shows acceptable ranges of each subparameter

Information Response to + CMD2=?

Also string type subparameters possible

Results Code Structure

When a command is issued, the G24-L responds with a message, called a "Result Code", which
tells the terminal the result of the command that was requested. Result codes can indicate, for
example, the execution status of the command or the remote modem connection status.

Result codes can be represented either as numerical codes or as verbose responses. By default, the
G24-L responds with verbose response codes.

The result code has the following structure:.

Prefix Code Suffix

where:
The results code prefix is <CR><LF>.
The results code suffix is <CR><LF>.

Response and Indications Structure

The following is the information response and indications structure:

Token Separator Arguments

where:
The separator is ":".
The following is an example of Response and Results code:

Figure 2-3: Response to a Command Line

If verbose responses are enabled (using the command V1) and all the commands in a command
line have been performed successfully, the result code <CR><LF>OK<CR><LF> is sent from
the G24-L to the terminal. If numeric responses are enabled (using the command V0), the result
code 0<CR> is sent instead.

If verbose responses are enabled (using the command V1) and sub-parameter values of a
command are not accepted by the G24-L (or if the command itself is invalid or cannot be
performed for any reason), the result code <CR><LF>ERROR<CR><LF> is sent to the terminal
and no subsequent commands in the command line are processed. If the numeric responses are
enabled (using the command V0), the result code 4<CR> is sent instead. The ERROR (or 4)
response may be replaced by +CME ERROR: <err> when the command was not processed due to
an error related to G24-L operation.

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Chapter 2: Introduction to AT Commands

ATQx

ATEx

ATS3=x

A

A
A

A

T

TTTC

CMMDD11

TCCMMDD

OOK

K

2
2

2
2

<CR>
<CR>

<CR>

<CR>
<CR>
<CR><CR>

<CR>

ATS5=x ATS4=xATVx

<LF>

<LF><LF>

<LF>

1
1

=
=

AT Commands Protocol & Structure Configuration

The AT commands message flow and structure may be configured by the termi nal.
The G24-L can be configured not to follow a command with an echo and/or results code. It can be

configured to transmit the results code in either of two ways: Verbose or Numeric. This (and
other) configurations can be set using the following commands:

Command Description

S3=[<value>] Command line termination character (default setting 0x13).
S4=[<value>] Response formatting character (default 0x10).
S5=[<value>] Command line editing character (default 0x 8).
E[<value>] Command echo (default 0, meaning the G24-L does not echo commands).
Q[<value>] Result code suppression (default 0, meaning the G24-L transmits re sult

codes).

V[<value>] G24-L response format (default 1, meaning verbose format).
X[<value>] Defines CONNECT result code format.

The figure below shows the flow and structure configuration commands:

Figure 2-4: Flow and Structure Configuration Commands

April 15, 2008 G24-L AT Commands Reference Manual 2-5

Command Token Types

Command Token Types

Basic Syntax Command Format

The format of Basic Syntax commands (except for the D and S commands) is:

<command>[<number>]

where:
<command> is either a single character, or the "&" character (IA5 2/6) followed by a single

character.
Characters used in <command> are taken from the set of alphabetic characters.

<number> may be a string of one or more characters from "0" through "9" representing a
decimal integer value.

S-parameters

Commands that begin with the letter S constitute a special group of parameters known as
"S-parameters". These differ from other commands in important respects:

• The number following the S indicates the "parameter number" being referenced. If the

number is not recognized as a valid parameter number, an ERROR result code is issued.

• Immediately following this number, either a "?" or "=" character (IA5 3/15 or 3/13,

respectively) appears:
"?" is used to read the current value of the indicated S-parameter.
"=" is used to set the S-parameter to a new value. "<parameter_number>"

"<parameter_number" =[<value>]
If the "=" is used, the new value to be stored in the S-parameter is specified in decimal form

following the "=".

Extended Syntax Command Format

Both actions and parameters have names, which are used in the related commands. Names always
begin with the character "+" (IA5 2/11). Following the "+", from one to sixteen (16) additional
characters appear in the command name.

All (GSM) cellular commands have the prefix "+C".
All Fax commands have the prefix "+F".
All General modem commands have the prefix "+G".
Most Motorola propriety commands have the prefix "+M".

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Command Argument Types

<value> consists of either a numeric constant or a string constant.
<compound_value> consist of several <value> parameters separated by commas.
Example of compound_value: <value1>,<value2>,…,<valueN>

Numeric Constants

Numeric constants are expressed in decimal, hexadecimal, or binary form. In the G24-L, the
definition of each command specifies which form is used for values associated with that
command.

String Const ants

String constants consist of a sequence of characters, bounded at the beginning and end by the
double-quote character (").

Chapter 2: Introduction to AT Commands

Command Mode Types

Parameter Set Command Syntax

The terminal may store a value or values in a parameter by using the SET command.
The parameter definition indicates, for each value, whether the specification of that value is

mandatory or optional. For optional values, the definition indicates the assumed (default) value if
none is specified. The assumed value may be either a previous value (that is, the value of an
omitted sub-parameter retains its previous value), or a fixed value (for example, the value of an
omitted sub-parameter is assumed to be zero). Generally, the default value for numeric
parameters is 0, and the default value for string parameters is "" (empty string).

The following syntax are used for:

• Actions that have no sub-parameters: +<name>

• Parameters that accept a single value: +<name>=<value>

• Parameters that accept more than one value: +<name>=<compound_value>

Parameter Read Command Syntax

The terminal can determine the current value or values stored in a parameter by using the
following syntax: +<name>?

Parameter Test Command Syntax

The terminal can test whether a parameter is implemented in the G24-L, and determine the
supported values, by using the following syntax: +<name>=?

April 15, 2008 G24-L AT Commands Reference Manual 2-7

Values

Values

Range of Values

When the action accepts a single numeric sub-parameter, or the parameter accepts only one
numeric value, the set of supported values may be presented in the information text as an ordered
list of values.

The following are some examples of value range indications:

Value Range Description

(0) Only the value 0 is supported.
(1,2,3) The values 1, 2, and 3 are supported.
(1-3) The values 1 through 3 are supported.
(0,4,5,6,9,11,12) The several listed values are supported.
(0,4-6,9,11-12) An alternative expression of the above list.

Compound Range of Values

When the action accepts more than one sub-parameter, or the parameter accepts more than one
value, the set of supported values may be presented as a list of the parenthetically enclosed value
range strings (described above), separated by commas.

For example, the information text in response to testing an action that accepts three
sub-parameters, and supports various ranges for each of them, could appear as follows:

(0),(1-3),(0,4-6,9,11-12)

Aborting Commands

Some action commands that require time to execute may be aborted while in progress. This is
explicitly noted in the description of the command. Aborting a command is accomplished by
transmitting any character from the terminal to the G24-L. A single character is sufficient to abort
the command in progress. To ensure that the aborting character is recognized by the G24-L, it
should be sent at the same rate as the preceding command line. The G24-L may ignore characters
sent at other rates. When an aborting event is recognized by the G24-L, it terminates the
command in progress and returns an appropriate result code to the terminal, as specified for the
particular command.

When a command is aborted, this does not mean that its operation is reversed. In the case of some
network commands, when the abort signal is detected by the G24-L, although the command is
aborted following G24-L-network negotiation, the operation might be fully completed, partially
completed or not executed at all.

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Chapter 3: AT Commands Reference

Modem ID

Subscriber Unit Identity

These commands allow the user to query the type of device that is attached, the technology used
in the device, as well as basic operating information about the device.

+CGMI, +GMI, +FMI, Request Manufacturer ID

These commands display manufacturer identification. The G24-L outputs a string containing
manufacturer identification information, indicating that this is a Motorola device.

Command Response/Action

AT+CGMI +CGMI: "Motorola"
AT+GMI +CGMI: "Motorola"
AT+FMI +CGMI: "Motorola"

Example

AT+CGMI
+CGMI: "Motorola"
OK
AT+GMI
+CGMI: "Motorola"
OK
AT+FMI
+FMI: "Motorola"

April 15, 2008 G24-L AT Commands Reference Manual 3-1

Modem ID

+CGMM, +GMM, +FMM, Request Model ID

These commands request the model identification. The G24-L outputs a string containing
information about the specific model, including a list of the supported technology used, and the
particular model number.

Command Response/Action

AT+CGMM

AT+GMM

AT+FMM

+CGMM

technologies>,<model>

+GMM

technologies>,<model>

+FMM

technologies>,<model>

: <list of supported

: <list of supported

: <list of supported

Example

AT+CGMM
+CGMM: "GSM900","GSM1800","GSM1900","GSM850","MODEL=G24-L"
OK

The following table shows the+CGMM string parameters.

String Description

"GSM900" GSM at 900 MHz
"GSM1800" GSM at 1800 MHz
"GSM1900" GSM at 1900 MHz (North American PCS)
"GSM850" GSM at 850 MHz

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Chapter 3: AT Commands Reference

+CGMR, +GMR, +FMR, Request Revision

These commands request the revision identification. The G24-L outputs a string containing the
revision identification information of the software version contained within the device.

Command Response/Action

AT+CGMR +CGMR: <revision>
AT+GMR +GMR: <revision>
AT+FMR +FMR: <revision>

Example

AT+CGMR
+CGMR: "G24-L SW 4-0.210-000"
AT+GMR
+GMR: "G24-L SW 4-0.210-000"
AT+FMR
+FMR: "G24-L SW 4-0.210-000"

+CGSN, +GSN, Request Product Serial Number Identification

This command displays the product serial number identification IMEI (International Mobile
Equipment Identification). It can be used even when the SIM card is not inserted.

Command Response/Action

AT+CGSN
AT+CGSN?

+GSN
+GSN?

The following table shows the +CGSN, +GSN parameters.

Table 3-1: +CGSN, +GSN Parameters

<Parameter> Description

<sn> The IMEI (International Mobile Station Equipment Identity) number is comprised of

15 digits, as specified by GSM 03.03 [3]. IMEI numbers are composed of the
following elements, all in decimal digits:
Type Approval Code (TAC) - 6 digits
Serial Number (SNR) - 6 digits
Spare digit - 1 digit
The TAC and SNR are protected against unauthorized changes.

+CGSN: <sn>

+GSN: <sn>

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Modem ID

Example

AT+CGSN?
+CGSN: "004400013805666"
OK
AT+GSN
+GSN: "004400013805666"
OK

+CSCS, Select Terminal Character Set

This command selects the G24-L character set. The G24-L supports the following character sets:
GSM, UCS2, UTF8, 8859-1 and ASCII.

The default value, set upon system initialization or when omitting <chest> in set command, is
ASCII.

Command

Type

Set

Read
Test

+CSCS=[<chset>] OK

AT+CSCS? +CSCS: <selected character set>
AT+CSCS=? +CSCS: (<supported character sets>)

Syntax Response/Action

or:
+CMS ERROR: <err>

The following table shows the +CSCS parameter optional values.

Table 3-2: +CSCS Parameters

<chset> Character Set Input/Output Format

“ASCII” ASCII (0x00 - 0x7F) Quoted string.

(For example, "AB" equals two 8-bit
characters with decimal values 65, 66.)

“GSM” GSM default alphabet

(GSM 03.38 subclause 6.2.1)

"UCS2" Unicode (ISO/IEC 10646 [32]) HEX representation.

HEX representation.

(For example, 00410042 equals two
16-bit characters with decimal values 65,

66.)

"UTF8" 8-bit Unicode (ISO 10646 transformation

format)

"8859-1" LATIN (ISO 8859-1) Quoted string.

Example

AT+CSCS=?

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HEX representation.

Chapter 3: AT Commands Reference

+CSCS: ("8859-1","ASCII","GSM","UCS2","UTF8")
OK
AT+CSCS?
+CSCS: "ASCII"
OK
AT+CPBS = "ME"
AT+CPBW=1,"8475763000",129,"Lin Zhao"
OK
AT+CSCS="UCS2"
OK
AT+CPBR=1
+CPBR: 1,"8475763000",129,004C006E006E0020005A00680061006F
OK
AT+CSCS="ASCII"
OK
AT+CPBR=1
+CPBR: 1,"8475763000",129,"Lin Zhao"
OK

+CIMI, Request IMSI

This command displays the International Mobile Subscriber Identity number.

Command Response/Action

AT+CIMI
AT+CIMI?

+CIMI: <imsi>
or:
+CME ERROR: <err>

Example

AT+CIMI
+CIMI: 314566320021400

+CFSN, Read Manufacturing Serial Number

This command is used to query the manufacturing serial number.

Command Response/Action

AT+CFSN? +CFSN: <Motorola Serial

Number>

Example

AT+CFSN?
+CFSN: "GLMMA000000069"

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Modem ID

OK

I, Request Identification Information

This command displays various G24-L information items.

Command Response/Action

A TIn <information item n>

or:
+CMS ERROR: <err>

The following table shows the information items that are supported by the G24-L.

ATIn Description Output

1 ROM checksum "000"
3 Reports Product Title Motorola GSM Module
5 Reports Software Architecture N5
7 Reports Product Description <current module type>
8 Reports Software Version <current software revision>
9 Reports Flex Version <current flex version>

Example

ATI7
G24-L OEM Module
OK
ATI8
G24-L SW 4-0.210-000
OK
ATI9
G24-L FLEX 0.210-000
OK

+CNUM, Request MSISDN(s)

This command displays up to five strings of text information that identify the G24-L. The output
string contains double quotes.

On platforms supporting MSISDN numbers, the string(s) returned are the MSISDN numbers and
their associated data.

On platforms not supporting MSISDN numbers, this command returns the current phone number
of the G24-L.

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Read Command

Command Response/Action

+CNUM (MSISDN supported) +CNUM: [<MSISDN1

string>],<MSISDN1>,<MSISDN1 type>
[+CNUM: [<MSISDN2
string>],<MSISDN2>,<MSISDN2 type>]
[...]

+CNUM (MSISDN not supported) +CNUM: <phone_number>

The following table shows the +CNUM parameters.

Table 3-3: +CNUM Parameters

<Parameter> Description

<MSISDN type> Phone number type

129 Use for local call
145 Use “+” for international access code
128 Unknown

Example

AT+CNUM?
+CNUM: "David","035558278",129
AT+CNUM //MSISDNs supported
+CNUM: "PHONENUM1","2173848500",129
+CNUM: "PHONENUM2","2173848501",129
+CNUM: "PHONENUM3","2173848502",129
+CNUM:"","",0
+CNUM:"","",0
AT+CNUM //MSISDNs not supported
+CNUM: "Motomix","2233445",129
+CNUM:"","",0
+CNUM:"","",0
+CNUM:"","",0

$, List of All Available AT Commands

This command displays a list of all the AT commands supported by the G24-L.

Command Response/Action

April 15, 2008 G24-L AT Commands Reference Manual 3-7

AT$ List of available AT commands

Modem ID

+CLAC, List of All Available AT Commands

Command Syntax Response/Action Remarks

Execute

+CLAC

List of available AT
commands

The Execute command displays a list
of all the AT commands supported by
the G24-L.

Example

AT+CLAC
$
%C
&C
&D
:
:
:
:
\A
\S
OK

Capability Reporting

This set of commands enables a user to determine G24-L’s protocol level. It also enables other
support provided by the G24-L, such as information about the currently implemented protocol
version (used to detect older G24-Ls that may not support all commands), as well as determining
which optional commands are implemented in a particular G24-L software load.

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Call Control

Managing a CSD (Data) Call

The G24-L working modes can be divided into two modes of operation.

The T erminal mode allows you to instruct th e modem to di al a remote modem by issuing the Dia l
command followed by the phone number. You can also include dial string modifiers in your
command line to give the modem additional instructions. The following dial modifiers are
available on most modems:

Chapter 3: AT Commands Reference

• Data Mode: In this mode, once the G24-L has established a link with the remote modem, it

does not respond to any data passing through it (except for the Escape Sequence search). The
G24-L becomes a non-transparent link, connecting the terminal with the remote side.

• Command Mode: In this mode, the G24-L responds to the AT commands issued by the

terminal. This is the default working mo d e .

Note: It is possible to switch between the operating modes.

• ","- Pause

Simple Dialing

In order to instruct the modem to dial a remote modem from an ordinary tone-dialing telephone
line, enter the Dial command followed by the phone number. For example, type the following
command:

ATD 876-5555 <Enter>

Note: If you receive characters which were sent, you can disable this with using the Echo

command (ATE0 <Enter>).

After issuing the Dial command, and if the remote modem answers the call, the two modems send
high-pitched carrier tones to one another which establish the transmission speed and other
parameters for the data connection. This process is called negotiation.

After the negotiation process, the message, "OK" followed by the connection speed, is received.
If the other phone line is busy, the message "NO CARRIER" is received.
If the other modem does not answer, the message "NO CARRIER" is received.
Once a connection has been established, the modem is ready to immediately begin transmitting

and receiving data. This may vary from sending messages to each other, sending or receiving
files, logging on to an information service, or any other data communication task you wish to
perform.

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Call Control

Switching From Data Mode to Command Mode

To switch the connection from Data mode to Command mode, send the Escape Sequence
command (+++).

If the modem responds with "OK" to the Escape command, the modem is in Command mode and
the dial connection is still active, and you can use the A T command set.

The Character '+'

The character '+' in the Escape Sequence pattern can be changed using the S2 S-register. Refer to

“S, Bit Map Registers”, page 3-194.

Escape is detected only by the G24-L and not by the remote side. The remote side stays in the
Data mode.

Hanging Up

If you are using a communications program, use the "Hang up" or "Disconnect" AT command in
the program to disconnect the call.

When using computers in the "Dumb Terminal mode", return to the Command mode by typing
the Escape Sequence, +++, and then hang up by typing the Hang up command as follows:

ATH <Enter>

If the G24-L responds with "OK", the dial connection is closed.

Dialing to an Electronic Telephone Service

When you dial to an electronic telephone service such as telephone banking, you must typically
instruct the modem to dial a number, then to wait for call establishment, and then send the
password for entering the banking account. A typical command line might look like this:

ATD876-5555,123456; <Enter>

The modem dials the number, then pauses to wait for the call connection (the comma in the
command line causes the pause).

You can also create a longer pause by including several commas in a row in the com mand line,
and then send the password to the service.

Receiving a Data Call

ATA <Enter>

This command instructs the modem to be the "answering modem". Either party may be the
answering or the originating modem, but both parties cannot be the same modem at the same
time.

You hear the modem handsh ake and see th e result code "CONNECT".

Note: Outgoing Voice Call during CSD Call, when switching to Command mode.

If using Dial Command to make Outgoing Voice Call, currently active CSD Call is
dropped and the new Voice Call is generated.

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Chapter 3: AT Commands Reference

Call Control AT Commands

D, Dial Command

This command places a DATA/VOICE call on the current network.
The default call type is a data call (CSD).
There must be an explicit request in order to make a VOICE call.
If a DATA call was originated and answered by the remote side, a "OK" notification is sent to the

terminal from the G24-L, and it moves to the online Data state.
For more information about call failure, use the AT+CEER comman d, described in “+CEER,

Extended Error Report” on page 3-213.

Note: If there is an active voice call and the terminal sends another ATD voice call command to

the G24-L, the active call is put on hold and the new number is called.

Command Response/Action

ATD<number>[;]

VOICE CALL:
1st response - Voice call place begins

OK

2nd response - Voice call connected:

OK

DATA:
2nd response only - Data call connected

CONNECT

When MO call fails:

1. Connection Failure - NO CARRIER or BUSY or NO ANSWER

2. General Failure - ERROR

3. Security reason (such as SIM not present) - OPERATION NOT
ALLOWED

4. Unknown reason - UNKNOWN CALLING ERROR

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Call Control

The following table shows the D parameters.

Table 3-4: D Parameters

<Parameter> Description

<number> Valid phone digits are: 0 1 2 3 4 5 6 7 8 9 * # + and ,

The following characters are ignored: A B C D - () / and <space>.
The comma <,> digit: When dialing a voice call, digits un til the comma are
considered addressing information (phone number). Any digits after the comma are
sent as DTMF tones after the voice call is connected. More than one comma causes a
pause in sending the tones. When dialing a data/fax call, the comma digit is ignored,
and all other digits before and after the comma are consid ered ad dressing inform ation
(phone number).
The plus <+> digit: Indicates that the international access code exists in the number.

semicolon (;) When given after <number string>, a voice call is originated to the given address,

otherwise a data call is originated.

Note: ATDP, ATDT, AT*D, <T>, <P> and <*> are ignored. The command is handled as ATD.

Initiating a GPRS connection is done through ATD*99#, as described in “D*99, Request

GPRS Service "D"” on page 3-242.

Example

atd44345678; //VOICE call (with semicolon)
OK
OK
atd44345678 //DATA call (without semicolon)
...
CONNECT //Move to online Data state

D>, Direct Dialing from Phone Books

This command places a FAX/DATA/VOICE call on the current network by dialing directly from
the G24-L phone book.

Notes:

• "+CME ERROR: not found" is returned when no match is found in an existing

phone book.

• FD phone book supports the (?) wild card character. Telephone numbers

containing this character cannot be dialed directly from the phone book.

• "+CME ERROR: Invalid index" is returned when entry <n> is out of the

requested Phonebook range.

• When SM phonebook is searched and the given entry value is of the ME

phonebook, ME phonebook will be searched as well (result code would be the
same as if MT phonebook was searched).

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Chapter 3: AT Commands Reference

The following table shows a detailed description for the D> commands.

Command Detailed Description

D><alpha>[;] Originates a call to a phone number with the corresponding alphanumeric field

<alpha>. The Current Phone Book (Set by +CPBS) is searched for the entry that
begins with the alphanumeric pattern <alpha>.

D>mem<n>[;] Originates a call to a phone number in memory (phone book) mem and stored in entry

location <n>. Available memories may be queried with Select Phone Book
Storage Test command +CPBS=?.

Note:

This command does not change the used memory set.

D><n>[;] Originates a call to a phone number from entry location <n> in the Current Phone

Book (Set by +CPBS).

Note: Current used memory (phone book) set/read is done through the memory command

+CPBS=/+CPBS? respectively.

The following table shows the D> parameters.

Table 3-5: D> Paramete rs

<Parameter> Description

<"alpha"> String type value, which should be equal to an alphanumeric field in a phone book

entry . The used character set should be the one selected with Select Terminal
Character Set +CSCS. <alpha> is case-sensitive, and should be placed in quotes
("alpha").

<n> This parameter is also called "speed dial location". It is an integer type memory

location. <n> should be in the range of locations available in the memory used.

<mem> This parameter is not case-sensitive.

Example

AT+CPBS="me" //Phone flash memory
OK
AT+CSCS="ASCII" //ASCII characters
OK
AT+CPBW=1,"035659090",129,"VoiceMail"
OK
AT+CPBR=1
+CPBR: 001,"035659090",129,"VoiceMail"
OK
atd>"VoiceMail"; //Phonebook by name
OK
OK
ath
NO CARRIER
OK

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Call Control

atd>1; //Speed dial from phonebook
OK
OK
ath
NO CARRIER
OK
atd>1 //Speed dial from phonebook
+CME ERROR: //Invalid characters in dial string
atd>"Motorola Internal"
+CME ERROR: //Invalid characters in dial string

For more examples, refer to “Call Control” on page 4-14 and “Data Call” on page 4-18.

DL, Dial Last Number

The DL command places a data/voice call to the last number dialed. The call progress
information (success/failure) is reported in the same way as for the Dial command. (Refer to “D,

Dial Command”, page 3-11).

Command Detailed Description

ATDL[;] Initial Response - Last Number retrieved:

ATDL: "DIAL DIGITS"
2nd response - Data/Fax call connected CONNECT
1st response - Voice call placement begins
OK
2nd response - Voice call connected OK

The following table shows the DL parameters.

Table 3-6: DL Parameters

<Parameter> Description

semicolon (;) If the semicolon (;) is given, a voice call is originated to the last dialed number.

If the semicolon (;) is not given, a Fax/Data call is originated.

Note:

The last dialed call type is irrelevant to the DL command.

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Chapter 3: AT Commands Reference

Note: When ATDL is issued after a dialed num ber with com ma di git :

• ATDL; (Voice) dials the exact number that was last dialed, including the DTMF tones
sent.

• ATDL (Data/Fax) dials the addressing information only (comma and tones are
discarded).

• If ATDL is sent before any Dial command was issued (mainly after Power On, when
the last number is an empty field), the G24-L will return NO CARRIER, as mentioned
in the ITU V.25-ter standard.

Example

atdl //Last called number is "035658278"
ATDL: "035658278"
OK //DA TA call
atdl;
ATDL: "035658278"
OK
OK //VOICE call
atdl //Last called number is "035658278,123,78;"
ATDL: "035658278"
CONNECT //DATA call
atdl; //Last called number is "035658278,123,78"
ATDL: "035658278p123p78"
OK
OK //VOICE call
1 2 3 //Sent as DTMF tones
... //Pause
7 8 //Sent as DTMF tones

H, Hang-up Call

This command hangs up a call. The G24-L terminates the call whether it is a data or voice call,
and whether it is an incoming, originating, waiting, or connected call.

A NO CARRIER message is returned to the terminal before the regular OK approval.

Note: To terminate (hang-up) a MO data/fax call while call is placed: Any character sent from

the terminal to the G24-L causes the Data/Fax call termination, and NO CARRIER is sent
from the G24-L to the terminal.

To terminate a held Voice call or to terminate a call out of a MTPY call, refer to “+CHLD,

Call Related Supplementary Services Command” on page 3 -23.

The following table shows the call states of the H command.

Call State Response/Action

IDLE Error 3 ("operation not allowed")
Single Active Call released
MTPY Active Call released (all ca lls)
Incoming call (RING) Call released

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Call Control

Call State Response/Action

Single Active and Waiting Call Single Active released (waiting not affected)
MTPY Active and Waiting Call MTPY Active released (waiting not affected)
Single Held or MTPY Held Error 3
Single (or MTPY) Active and Single (or

Single (or MTPY) Active released

MTPY) Held
Held (Single or MTPY) and Waiting Call Waiting call released
Single (or MTPY) Active and Single (or

Single (or MTPY) Active released

MTPY) Held & Waiting call

Example

RING //Incoming call
RING //Incoming call
ath //Hang-up incoming call
NO CARRIER
OK //Incoming call has been terminated - user determined user busy
RING
ata
OK //Voice call connected
ath //Hang-up connected call
NO CARRIER
OK //Active call has been hung-up - terminated
(... Active multi party call, with 3 numbers …)
ath
NO CARRIER
NO CARRIER
NO CARRIER
OK
atd035659260;
OK
ath //Terminate MO voice call while placed
NO CARRIER
OK
Example - Hanging up a data call:
atd035659260
CONNECT //Data call connected - Online Data mode
…
+++ //ESC Sequence is sent from the terminal to the G24-L
OK //The G24-L is in Command mode
ath //Terminate Data call
NO CARRIER
OK

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Chapter 3: AT Commands Reference

A, Answer Incoming Call

This command answers an incoming VOICE/DATA/FAX call after a RING/+CRING indication
is sent to the terminal.

If the incoming call is answered (connected), the G24-L sends a CONNECT notification to the
terminal.

If the MT call fails, the possible notifications are:

• NO CARRIER - Connection Failure

• ERROR - General Failure

Note: A waiting call (an incoming call while a call is in progress) is announced by +CCWA

rather than RING. A waiting call can be answered only if it is a voice call. The waiting
voice call should be answered using the A TA command, which will put the active call on
hold and will connect the waiting call, making it the active call. This ATA action is the
same action as AT+CHLD=2.

Example

Example - Answering a voice call:
AT+CRC=1
+CRING: VOICE
+CRING: VOICE
ata
OK //VOICE call connected - G24-L is in Command mode
ath
NO CARRIER
OK
Example - Answering a data call:
+CRING: REL ASYNC
+CRING: REL ASYNC
ata
... //Connecting (dots are not displayed)
OK //DATA call connected - G24-L is in Online Data mode

Note: In a CSD call, call release is not valid during the phase of call negotiation (from OK until

connect call).

+CRC, Cellular Result Codes and RING, +CRING - Incoming Call
Indication

This command controls whether or not to present the extended format of an incoming call
indication. The RING/+CRING indication is sent from the G24-L to the terminal when the G24-L
is alerted by an incoming call from the network. Once this indication is sent, information is
available on the calling line via +CLIP. When +CRC is disabled, the indication is RING, and
when +CRC is enabled, the indication is +CRING.

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Call Control

Command

Type

Set

Read

Test

Syntax Response/Action Remarks

+CRC=[<n>] OK

+CRC? +CRC: <n>

OK

+CRC=? +CRC: (list of supported <n>s)

RING/+CRING Indication

+CRING: <type>
or:
RING

The following table shows the +CRC parameters.

Table 3-7: +CRC Parameters

The Set command enables/disables the
extended format of an incoming call
indication. When enabled, an incoming
call is indicated to the terminal with an
unsolicited result code
+CRING:<type> instead of the normal
RING.

The Read command queries the cur rent
settings for the cellular result code.

The T est command returns the po ssible
<n> values.

<Parameter> Description

<n> 0 Extended format disabled

1 Extended format enabled
The default value is 0.

<type>

ASYNCCSD
REL ASYNCCSD
FAX
VOICE
ALT

Type of incoming call:
asynchronous transparent
asynchronous non-transparent
Fax class 1
Normal voice
Fax/voice

Example

AT+CRC?
+CRC: 0
OK
AT+CRC=?
+CRC: (0-1)
OK
Example - RING/+CRING indication
(..Incoming Data Call..)
RING
RING

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RING
AT+CRC=1 //Enable extended ring format
OK
+CRING: REL ASYNC
+CRING: REL ASYNC
ath
AT+CRC=1
OK //Mobile fax call terminated (multi-numbere d scheme) from PSTN

fax machine
+CRING: ALT Voice/F ax
NO CARRIER
OK

+CLIP, Calling Line Identification

This command controls the Calling Line Identity (CLI) presentation indication to the terminal
when an incoming call is detected by the G24-L.

This command allows the user to query the provisioning status of the CLI by the network and by
the G24-L. The command also allows the user to enable/disable the CLI presentation by the
G24-L to the terminal.

The +CLIP indication information varies depending on what is provided by the network and what
information is stored in the G24-L phone book.

Command

Type

Set

Read

Test The Test command returns the Set

Syntax Response/Action Remarks

AT+CLIP=<n> OK

+CME ERROR: <err>

AT+CLIP? +CLIP: <n>, <m>

OK

The Set command enables or disables
the presentation of the CLI indication
from the G24-L to the terminal.

Note:

The Set command does not
address the network.

The Read command returns the +CLIP
enable/disable state in the G24-L as
well as in the network provisioning
state of the CLI presentation.

command options (0,1).

+CLIP Indication

When the CLI presentation indication is enabled by the G24-L (<n>=1), this unsolicited
indication is sent to the terminal after the RING indication.

+CLIP:<number>,<type>[,<subaddr>,<satype>[,[<alpha>][,<CLI validity>]]]

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Call Control

The following table shows the +CLIP parameters.

Table 3-8: +CLIP Parameters

<Parameter> Description

<n> Enables/disables the CLI presentation indication after the ring indication:

0 Disable CLI presentation
1 Enable CLI presentation
The default is 0.

<m> Shows the subscriber CLIP service status in the network:

0 CLIP not provisioned
1 CLIP provisioned
2 Unknown (for example, no network and so on)

<"number"> Calling line number. The number format is specified by <type>.
<type> Type of address octet in integer format:

145 Default when the dialing string includes the international access code character
"+".
129 Default when making a local call.
128 Type of number is unknown (usually the output when the number itself is
unknown).

<subaddr> NULL, field not used (String type subaddress of format specified by <satype>)
<satype> Field not used. Value is always 128 (unknown) - type of sub address octet in integer

format.

<"alpha"> Name of the calling party (if provided by the network or if the number is found in the

G24-L phone books).

<CLI validity> The Validity of the Calling Line Identity presentation:

0 CLI valid.
1 CLI has been withheld by the originator.
2 CLI is not available due to networking problems or limitations of the
originating network.

Example

AT+CLIP=?
+CLIP: (0,1) //CLI presentation is disabled by the G24-L (0) and is enabled by the

network (1)
OK
AT+CLIP=1
OK
Example +CLIP indication:
(…incoming call…)
RING
+CLIP: "2173845400",129,,128,"Doe John",0
Example +CLIP indication with restricted CLI:
AT+CRC=1
OK
(…incoming call…, caller restricted the CLI presentation (used AT+CLIR)…)
+CRING: VOICE
+CLIP: "",128,,128,"",1

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+CCWA, Call Waiting Command

This command controls the Call Waiting supplementary service, including the settings and the
queries of the G24-L and the network. When the Call Waiting indication is enabled by the G24-L
and there is a waiting call, a +CCWA: indication is sent from the G24-L to the terminal.

Note: The G24-L supports only one of the services at a time: Voice, Data or Fax. Multiparty is

a voice-only functionality.
A CCWA indication is sent to the terminal only during a v oice call-waiting event. A

CCWA indication is not sent for a fax/data call during in a voice session.

Action Syntax Response Remarks

Set

Read

Test

+CCWA=[<n>[,
<mode>[,<class>]]]

+CCWA? +CCWA: <n>

+CCWA=? +CCWA: (list of

OK
If <mode>=2 and the

command succeeds:

+CCWA:

<status>,<class1>

[<CR><LF>+CCWA:

<status>,<class2>

[...]]
OK

OK

supported <n>s)

The Set command enables/disables the
Call-Waiting indication in the G24-L and
in the network. Activation, deactivation
and status query are supported.

Note:

When the <mode> parameter is set
to 2 (network query), the <n>
parameter is ignored. This means
that no enable/disable action is
performed while querying the
network.

The Read command returns the
enable/disable status of the call waiting
indication in the G24-L (<n>).

The Test command returns <n> values
supported by the G24-L as a compound
value.

+CCWA Indication

When a call-waiting indication is enabled by the G24-L (<n>=1), the following unsolicited
indication is sent to the terminal from the G24-L:

+CCWA:<number>,<type>,<class>,[<alpha>][,<CLI validity>]

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Call Control

The following table shows the +CCWA parameters.

Table 3-9: +CCWA Parameters

<Parameter> Description

<n> Enables/disables the call waiting indication to the terminal by the G24-L.

0 - Disable
1 - Enable
The default is 0.

<mode> Call waiting service request to the network. When the <mode> parameter is not given,

the network is not interrogated.
0 - Disable
1 - Enable
2 - Query status

<class> Sum of integers each representing a class of information.

1 - Voice (telephony)
2 - Data (refers to all bearer services)
4 - Fax (facsimile services)
The default value is 7.

<"number"> Calling line number. The number format is specified by <type>.
<type> Type of address octet in integer format:

145 - Default when the dialing string includes the international access code character
"+".
129 - Default when making a local call.
128 - Type of number is unknown (usually the output when the number itself is
unknown)

<status> Call waiting support by the network (output for <mode>=2).

0 - Not active
1 - Active

<"alpha"> Name of the calling party (if provided by the network or if the number is found in the

G24-L phone books).

<CLI validity> The Validity of the Calling Line Identity presentation:

0 - CLI valid.
1 - CLI has been withheld by the originator.
2 - CLI is not available due to networking problems or limitations of the originating
network.

Note: When the parameter <mode> is 2 (Query status), the first parameter is ignored and the

third parameter is always treated as class = 7.

Example

AT+CCWA=1 //Enable call waiting on G24-L
OK
AT+CCWA=?
+CCWA: (0,1)
OK
AT+CCWA?
+CCWA: 1

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OK
Examples of +CCWA set command - network interrogation
AT+CCWA=1,2 //Class parameter is considered as 7
+CCWA: 1,1 //Call waiting is active for class 1, voice
+CCWA: 2,0 //Call waiting is not active for class 2, data
+CCWA: 4,0 //Call waiting is not active for class 4, fax
OK
AT+CCWA=1,2,2 //Class parameter is 2
+CCWA: 2,0 //Call waiting is not active for class 2, data
+CCWA: 4,0 //Call waiting is not active for class 4, fax
OK
AT+CCWA=1,1
OK //Enable the call waiting feature in the network, and in the G24-L
Example +CCWA indication
atd9311234567; //Originate a voice call
OK
OK //Voice call connected
(...conversation...)
(… call waiting indication received by the G24-L …)
+CCWA: "[phone]",145,1,"Bob"
+CCWA: "[phone]",145,1,"Bob"
AT+CHLD=0 //Release the waiting call
OK
NO CARRIER
AT+CRC=1 //RING indication is not relevant to CCWA indication
OK
(…waiting call…, caller restricted to its CLI presentation (used AT+CLIR)…)
+CCWA: "",128,1,"",1 //CLI is restricted, but call type recognized as voice
+CCWA: "",128,1,"",1

+CHLD, Call Related Supplementary Services Command

This command controls the Call Hold and Multiparty Conversation services. This command
manipulates voice calls only.

Set Command

The Set command allows the control of the following call related services:

• Call HOLD: A call can be temporarily disconnected from the G24-L, but the connection is

retained by the network.

• MTPY (Multi party) Conversation: Conference calls.

The network does not reserve more than one traffic channel for a mobile station, therefore the
G24-L can have only one call on hold at a time.

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Call Control

Note: Only voice calls can be put on HOLD.

A precondition for the multi-party service is that the G24-L is in control of one active call
and one call on hold. In this situation, the G24-L can request the network to begin the
MTPY (Multi Party) service. Once a MTPY call is active, remote parties may be added,
disconnected or separated (removed from the MTPY call, but remain connected to the
served mobile subscriber).The maximum numb er of remote parties is 5.

In this command, the term CALL refers to a single or MTPY call.
A single Active call is considered a MTPY call with one call index numbered as 1.

Command Response/Action

+CHLD=<n> If the call is terminated:

OK (approve request was submitted)
NO CARRIER
If the call state is changed (link, split, from active to hold, and so on):
OK (approve request was done)
If the call is terminated and another call is answered:
OK (approve request was submitted)
NO CARRIER
OK (call answered and is now connected)

Command

Type

Test

Syntax Response/Action Remarks

+CHLD=? +CHLD: (list of supported <n>s)

OK

The following table shows the +CHLD parameters.

Table 3-10: +CHLD Parameters

<Parameter> Description

<n> Call hold operation:

0 - Releases all held calls
OR
Sets User Determined User Busy for a waiting call
1 - Releases all active calls and accepts the held or waiting call
1x - Release specific call x, where x is the serial number of a call participating in an
active MTPY call.
2 - Places all active calls on hold and accepts the held or waiting call
2x - In the case of an active MTPY call, places all ac tiv e call s on ho ld, exc ept fo r call
x. Call x remains active.
3 - Adds a held call to the conversation - MTPY

Note:

"Held calls" or "active calls" means a held or active single or MTPY call. There
cannot be two or more different held/active single/MTPY calls.

The Test command returns <n> values
supported by the G24-L to the terminal

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The following table shows the +CHLD actions according to state and operation:

Table 3-11: +CHLD Actions According to Call State and Operation

CHLD <operation>

Call State

IDLE Error 3
Single Active

Call

MTPY Active
Call

Incoming
Call (RING)

Single Active
Call and
Waiting Call

0 -Release

Held Call

Error 3. Releases

Error 3. Releases

Error 3.

Releases
waiting call.

1 - Release

Active Call,

Accept Held

Call

active call.

active call.

Releases
active call,
accepts
waiting call.

1x - Release

Active/Held

Call x from

MTPY Call

If x=1,
releases
active call,
otherwise
error 22.

Releases
specific
active call x.
If x does not
exist, then
error 22.

Releases
specific
active call x.
If x does not
exist, then
error 22.

2 - Switch

Between
Held and

Active Call

Puts active
call on hold.

Puts active
call on hold.

Puts active
call on hold,
accepts
waiting call.

2x - Active
MTPY Call to
Hold, Except

for Call x

Error 3. Error 3.

Split. If call x
does not exist,
then error 22.

Error 3. Error 3.

3 - Add Held

Call to

Active Call

Error 3.

MTPY Active
Call and
Waiting Call

Single Held
Call

MTPY Held
Call

Single (or
MTPY)
Active Call
and Single (or
MTPY) Held
Call

April 15, 2008 G24-L AT Commands Reference Manual 3-25

Releases
waiting call.

Releases held
call.

Releases held
call.

Releases held
call.

Releases
active call,
accepts
waiting call.

Accepts held
call.

Accepts held
call.

Releases
active call
and accepts
held call.

Releases
specific
active call x.
If x does not
exist, then
error 22.

Releases held
call.

Releases
specific
call x. If x
does not exist,
then error 22.

Releases
specific
active call x.
If x does not
exist, then
error 22.

Puts active
call on hold
and accepts
waiting call.

Accepts held
call.

Accepts held
call.

Switches. Error 3. Makes a

Split. If x
does not exist,
then error 22.

Error 3. Error 3.

Error 3. Error 3.

Error 3.

conference
call.

Call Control

Table 3-1 1: +CHLD Actions According to Call State and Operation (Cont.)

CHLD <operation>

Call State

Held (Single
or MTPY)

0 -Release

Held Call

Releases
waiting call.

1 - Release

Active Call,

Accept Held

Call

Accepts
waiting call.

1x - Release

Active/Held

Call x from

MTPY Call

Error 3. Accepts

Call and
Waiting Call

Single (or
MTPY)
Active Call
and Single (or
MTPY) Held
and Waiting

Releases
waiting call.

Releases
active call,
and accepts
waiting call.

Releases
specific
active call x.
If x does not
exist, then
error 22.

Call
Split: Places the active MTPY call on hold, except for a specific call x.

Switch: Places the active call on hold and accepts the Held call
Error 3: "Operation not allowed"
Error 22: "Not found"

Example

AT+CHLD=?
+CHLD: (0,1,1x,2,2x,3)
OK
AT+CCWA=1 //Enable call waiting
OK
atd9311234567; //Originate a voice call
OK
OK
(...conversation...)
+CCWA: "[phone]",145,1,"Bob" //Awaiting call alerts
AT+CHLD=2 //Put first call on hold and answer the second call
OK
(...conversation...)
AT+CHLD=3 //Add the held call to the conversation
OK
(...MTPY conversation...)
AT+CHLD=22 //Split: Place the MO active call on hold, MT call remains active
OK
AT+CHLD=0 //Release the held call
OK
NO CARRIER
ath //Release the active call
NO CARRIER
OK
atd9311234567; //Originate a voice call
OK

2 - Switch

Between
Held and

Active Call

waiting call.

Error 3 (too
many calls on
hold.

2x - Active
MTPY Call to
Hold, Except

for Call x

3 - Add Held

Call to

Active Call

Error 3. Error 3.

Error 3. Makes a

conference
call. Waiting
call is not
touched.

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Chapter 3: AT Commands Reference

OK
+CCWA: "055728386",129,1,"",0 //Waiting call alerts
AT+CHLD=1 //Release the active call, accept the waiting call
OK
NO CARRIER //Active 9311234567 was released
OK //Waiting 055728386 wa s answered

+CCFC, Call Forwarding Number and Conditions

This command enables control of the call-forwarding supplementary service. Registration,
erasure, activation, deactivation, and status query are supported.

Command

Type

Set

Test

Syntax Response/Action Remarks

+CCFC=<reason>,<mode>
[,<number>[,<type>[,<class>
[,<subaddr>[,<satype>[,<tim
e>]]]]]]

+CCFC=? +CCFC:<reason>

If the command succeeds:

+CCFC:
<status>,<class1>[,<number>,<type>
[,<subaddr>,<satype>[,<time>]]][<CR>
<LF>
+CCFC:
<status>,<class2>[,<number>,<type>
[,<subaddr>,<satype>[,<time>]]][...]]

+CCFC: (list of supported <reason>s)

OK

The Set command
instructs the G24-L
which call
forwarding settings
to request from
network. The Set
command, in query
mode, interrogates
the network about
the subscriber
current call
forwarding status.

The Test command
returns <reason>
values supported
by the G24-L to the
terminal.

April 15, 2008 G24-L AT Commands Reference Manual 3-27

Call Control

The following table shows the +CCFC parameters.

Table 3-12: +CCFC Parameters

<Parameter> Description

<reason> 0 - Unconditional

1 - Mobile busy
2 - No reply
3 - Not reachable
4 - All call forwarding
5 - All conditional call forwarding

<mode> 0 - Disable

1 - Enable
2 - Query status
3 - Registration
4 - Erasure

<"number"> Calling line number. The number format is specified by <type>.
<type> Type of address octet in integer format-.

145 Default when dialing string includes international access code character "+".
129 Default when making a local call.

<subaddr> NULL, field not used (String type subaddress of format specified by <satype>).
<satype> Field not used. Value is always 128 (unknown) - type of sub address octet in integer

format.

<classx> The sum of integers each representing a class of information.

1 - Voice
2 - Data - refers to all bearer services.
4 - Fax
The default value is 7.

<time> 1-30 - The number of seconds to wait before calls are forwarded, when "no reply" is

enabled or queried. The default value is 20.

Note:

The parameter must be a multiple of 5, for example, 5, 10, 15 and so on. If not,
the modulo of 5 will be ignored.

<status> 0 - Not active

1 - Active

Note: A forward-to phone <number> (and the optional fields <type>, <subaddr> and <satype>)

are tied to a <reason> and a <class>. This means that there can be a different <number>
for the same <reason> because of a different <class>. When registering without
mentioning a <class>, <class>=7 is selected.

A <number> field is mandatory when registering (<mode>=3) and it is irrelevant
(ignored) in all other <mode>s.

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Chapter 3: AT Commands Reference

Example

AT+CCFC=?
+CCFC: (0-5)
OK
AT+CCFC=0,3,"01256316830",129,1
OK
AT+CCFC=1,3,"0545658278",129,1 //Register UC forward-to of all classes.
OK
AT+CCFC=1,1 //Activate UC forward-to of all classes.
OK
AT+CCFC=1, 2 //Interrogate reason not-reachable of all classes.
+CCFC: 1,1,"[phone]",145
+CCFC: 0,2,"",0
+CCFC: 0,4,"",0
OK //For <reason>=3, forward only voice calls is activated.
AT+CCFC=4,2 //Interrogate reason all-call-forwarding for all classes.
+CME ERROR: no network service //Interrogation of <reason>=30 is not supported by network.
AT+CCFC=2,3,"[phone]"
OK
AT+CCFC=2,0 //Disable call-forwarding for reason no-reply of all classes.
OK
AT+CCFC=2,2
+CCFC: 0,1,"[phone]",145,,25
+CCFC: 0,2,"[phone]",145,,25
+CCFC: 0,4,"[phone]",145,,25
OK

+CLIR, Calling Line Identification Restriction

This command instructs the G24-L to query, enable or disable the presentation of the CLI (calling
line ID) of a MO call to the called party. The restriction of the CLI (disable presentation) is
dependent both on the G24-L and on the network.

The network enables three possible provisions of CLIR:

• Not provisioned (CLIR Off - presentation allowed)

• Provisioned permanently

• Provisioned with Temporary mode

The provision is fixed and cannot be changed by an AT command.
Temporary Mode:
Temporary mode can be in one of two states:

• A - Presentation restricted (CLIR On) as default.

• B - Presentation allowed (CLIR Off) as default. A subscriber to Temporary mode always has

a default subscription to state A or B. Temporary-mode provisioning means that the terminal
can request the G24-L to switch the default mode from A to B, and vice versa.

April 15, 2008 G24-L AT Commands Reference Manual 3-29

Call Control

Note: When a service is in state A, and the terminal wants to enable the CLI presentation (turn

CLIR off) for a single call, it can do so using the ATD command. This does not change
the Temporary mode state. This can also be done when the service is in state B and the
terminal wants to disable the CLI presentation (turn CLIR on) for a single call.

Command

Type

Set

Read

Test

Syntax Response/Action Remarks

+CLIR=<n> OK

+CLIR? +CLIR:<n>,<m>

OK

+CLIR=? +CLIR: (list of supported

<n>s)

The following table shows the +CLIR parameters.

Table 3-13: +CLIR Parameters

<Parameter> Description

<n> Adjustment for outgoing calls

0 - Presentation indicator is used according to the subscription of the CLIR service
1 - CLIR invocation
2 - CLIR suppression
The default is 2.

The Set command instructs the G24-L to
enable/disable CLI restriction for all MO
calls.

The Read command returns the current
setting of CLIR on the network <m> and
on the G24-L <n>.

The Test command returns <n> values
supported by the G24-L.

<m> Subscriber CLIR service status in the network

0 - CLIR not provisioned
1 - CLIR provisioned in permanent mode
2 - Unknown (for example, no network and so on)
3 - CLIR Temporary mode presentation restricted (can be the default)
4 - CLIR Temporary mode presentation allowed (can be the default)

Example

AT+CLIR=?
+CLIR: (0,1,2)
OK
AT+CLIR?
+CLIR: 1,4
AT+CLIR=2
OK
atd054565195; //MO voice call
OK
(… calling …)
(… a G24-L that has 054565195 SIM and is CLIP enabled will receive the following on the terminal:
RING
+CLIP: "",128,,128,"",1

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Chapter 3: AT Commands Reference

RING
+CLIP: "",128,,128,"",1)
ath
NO CARRIER
OK
AT+CLIR=0
OK
atd054565195; //MO voice call
OK
(… calling …)
(… a G24-L that has 054565195 SIM and is CLIP enabled will receive the following on the terminal:
RING
+CLIP: "054565006",129,,128,"",0
RING
+CLIP: "054565006",129,,128,"",0 …)
ath
NO CARRIER
OK

+CBST, Select Bearer Service Type

This command sets the GSM bearer service (data circuit duplex asynchronous and synchronous).
It chooses one of the bearer services, the data rate of the service (actually the modulation when
modem IWFs are used), and enables or disables the Radio Link Protocol.

Command

Type

Set

Syntax Response/Action Remarks

AT+CBST=[<speed>[,<
name>
[,<ce>]]]

OK
+CME ERROR: <err>

The Set command selects the bearer
service <name> with data rate <speed>
and the connection element <ce> to b e
used when data calls are originated
(refer to GSM 02.02). Values may also
be used during mobile terminated data
call setup, especially in the case of
single numbering scheme calls.

Note:

The G24-L does not change the output,
but for incoming calls, the phone
works in automatic mode.

For incoming calls, the bearer
service will be taken
automatically from incoming
parameters and not according
to the CBST Set command.

April 15, 2008 G24-L AT Commands Reference Manual 3-31

Call Control

Command

Type

Read

Test

Syntax Response/Action Remarks

AT+CBST? +CBST:

<speed>,<name>,<ce>
OK

AT+CBST=? +CBST: (list of

supported
<speed>s),(list of
supported
<name>s),(list of
supported <ce>s)
OK

The Test command returns values
supported by the MA as compound
values.

The following table shows the +CBST parameters.

Table 3-14: +CB ST Parame te rs

<Parameter> Description

<speed> 0 - Auto-bauding (automatic selection of the speed; this setting is possible in case of

3.1 kHz modem and non-transparent service)
6 - 4800 bps (V.32)
7 - 9600 bps (V.32)
14 - 14400 bps (V.34)
68 - 2400 bps (V.110 or X.31 flag stuffing)
70 - 4800 bps (V.110 or X.31 flag stuffing)
71 - 9600 bps (V.110 or X.31 flag stuffing)
75 - 14400 bps (V.110 or X.31 flag stuffing)
The default value is 7.

Note:

Currently the G24-L supports:
2 baud rates: 4800 and 9600 bps
2 protocols: V.110 and V.32

<name> 0 - Data circuit asynchronous (UDI or 3.1 kHz modem)

1 - Data circuit synchronous (UDI or 3.1 kHz modem)
The default value is 0.

<ce> 0 - Transparent (Reserved for future implementation)

1 - Non-transparent (default)

Example

AT+CBST=?
+CBST: (000,004,006,007,014,068,070,071,075),(000-001),(000-003)
OK
AT+CBST?
+CBST: 007,000,001
OK
AT+CBST=6
OK
AT+CBST?
+CBST: 006,000,001
OK

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O, Return to Online Data State

This command returns the G24-L from the Command mode to the Online Data mode and issues a
CONNECT or CONNECT <text> result code.

After dialing or answering (atd/ata commands and connect), the phone enters the Online Data
mode where it is able to transfer data, but not to enter AT commands.

The ESC command +++, transfers the phone to the Command mode (able to input AT commands,
while preserving the Data call). The O command returns the phone to the fully Online Data mode
(as it was before using the ESC command).

Note: The escape character '+' can be changed using the S2-register.

The time delay between consecutive escape characters is configured using the
S12-register.

Command

Type

Execute

ATO CONNECT

Syntax Response/Action

+CME ERROR: <err> If phone is not in Data
Call

NO CARRIER: If connection is not
successfully resumed.

Example

ATD035684072 //Calling a remote modem - data call
CONNECT //G24-L is in Data mode

//Escaping back to Command mode using the +++ sequence
OK
AT //G24-L is in Command mode
OK
ATO //Returning to Data mode
CONNECT

&Q, Asynchronous Mode

This command selects the asynchronous mode, and has no effect.

April 15, 2008 G24-L AT Commands Reference Manual 3-33

Qn Description

Q0 Normal asynchronous operation (no error correction)
Q5 Error corrected operation (default)
Q6 Normal asynchronous operation (no error correction)

Call Control

+CHUP, Hang Up Call

This command causes the G24-L to hang up the current GSM call.

Command Type Syntax Response/Action Remarks

Set

+CHUP OK

+CME ERROR <err>

The Set command hangs up the current
GSM call.

+CSNS, Single Numbering Call Scheme

This command handles the selection of the bearer or teleservice to be used when a mobile
terminated single numbering scheme call is established. If the calling party specifies the required
bearer capability, this capability is used for the call setup attempt. If the calling party does not
specify the required bearer capability (for example, because the call originated in the PSTN), the
network attempts to determine it, as described below.

Some cellular networks use a multi-numbering scheme, where several mobile station ISDN
numbers, or MSISDNs, are associated with one IMSI in order to define the bearer capability by
the MSISDN. Each MSISDN is used for a different bearer capability. If the network uses a
multi-numbering scheme and the calling party has not specified the required bearer capability,
then the network uses the bearer capability associated with the called party MSISDN.

However, some networks omit the bearer capability associated with the called party MSISDN,
when this MSISDN is associated with voice service and the calling party has not specified the
required bearer capability (for example, because the call originated in the PSTN). In these cases,
the +CSNS command is used to select the desired bearer or teleservice for a single-numbering
scheme, in which one MSISDN is associated with each IMSI. The +CSNS command has a
default mode, so is not mandatory to set it.

If the network uses a single-numbering scheme and the calling party has not specified the
required service, then the network omits the bearer capability information.

Command

Type

Set

Read

Test

3-34 G24-L AT Commands Reference Manual April 15, 2008

+CSNS=<mode>[,<repeated>] OK

+CSNS? +CSNS: <mode>

+CSNS =? +CSNS: (list of

Syntax Response/Action Remarks

The Set command selects the

+CME ERROR: <err>

supported mode>s),
<repeated>

bearer or teleservice to be use
when a mobile-terminated
single numbering scheme call is
established.

The Read command displays the
currently active CSNS mode.

The Test command displays the
list of supported CSNS modes.

Chapter 3: AT Commands Reference

The following table shows the AT+CSNS parameters.

Table 3-15: +CSNS Parameters

<Parameter> Description

<mode> CSNS mode:

0 - Voice (default)
2 - Fax (TS 62)
4 - Data

<repeated> Defines for how long to save the new setting:

0 One shot (new setting is not saved)
1 CSNS mode is saved until new +CSNS set command is issued or next power

cycle, whichever occurs first.

2 CSNS mode is saved until new +CSNS set command is issued. The CSNS

mode will be stored in non-volatile memory and will be effective after power
cycle.

Note: Any mobile-terminated call lacking bearer capability information is handled according to

the current CSNS setting.
When <mode> is set to data service, the parameter values set with the +CBST command

are used (Refer to “+CBST, Select Bearer Service Type” on page 3-31). If the +CBST
parameter is set to a value that is not applicable to single numbering calls, the G24-L
maps the value to the matching one, according to the Mapping Table (Table 3-16).

The <mode> selected in conjunction with <repeated> value ’2’ setting replaces <mode>
setting in MS non-volatile memory of the bearer or teleservice to be used when mobile
terminated single numbering scheme call is established. Selected <mode> is effective
until new CSNS set command is issued. After power cycle, <mode> setting in MS
non-volatile memory returns to be effective (<mode> selected in conjunction with
<repeated> value ’2’ or default <mode>).

If CSNS set command is issued in conjunction with <repeated> value ’0’ (one shot), then
selected <mode> is effective until any call indication is received (RING, CRING, CLCC,
and so on). Afterwards, <mode> stored in MS non-volatile memory, returns to be
effective.

If CSNS set command is issued in conjunction with <repeated> value ’1’, then selected
CSNS <mode> is effective until new CSNS set command is issued or until next power
cycle.

If CSNS set command is issued without parameter <repeated>, the value of repeated is
assumed to be ’0’.

April 15, 2008 G24-L AT Commands Reference Manual 3-35

Call Control

The only +CBST parameter that needs mapping for mobile terminated calls is <speed>, as
described in the table below. The V.110 protocol is replaced by the analog protocol regardless of
the +CBST setting. All other parameters are set by the +CBST command.

Table 3-16: Mapping Table (V.34)

+CBST setting Mapped value for mobile terminated call

0 autobauding
4 2400 bps (V.22bis)
6 4800 bps (V.32)
7 9600 bps (V.32)
14 14400 bps (V.34)
68 2400 bps (V.110 or X.31 flag stuffing)
70 4800 bps (V.110 or X.31 flag stuffing)
71 9600 bps (V.110 or X.31 flag stuffing)
75 14400 bps (V.110 or X.31 flag stuffing)

Note: CSNS has read-only access to CBST data.

+MDC, Selection of Desired Message to Be Displayed Upon
Connection of a Voice Call

This AT command enables you to select the desired messages to be displayed upon connection of
a voice call with a remote party. The OK and CONNECT messages are available.

Command Type Syntax Response/Action Remarks

Set

Read

+MDC=<mode> OK

or:
ERROR

+MDC? ++MDC: <mode>

OK

The Set command selects which of the
supported messages will be displayed
upon connection of a voice call.
<mode> Command Parameters:
0 - Display OK on voice call
connection
1 - Display CONNECT on voice call
connection
Default Values:
Power Up - As previously saved in
NVM FLEX bit
0 - Before Set command is first used

The Read command should return the
current selection of <mode>.

Test

3-36 G24-L AT Commands Reference Manual April 15, 2008

+MDC=? +MDC: (list of

supported <mode>s)
OK

The T est command returns the po ssible
<mode> values.