Sony 6220502-BV User Manual

Integrator’s Manual

Product Photo/Illustration

GM28

SAR statement: This product is intended to be used with the antenna or other radiating element at least 20cm away from any part of the human body.

The information contained in this document is the proprietary information of Sony Ericsson Mobile Communications International. The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Sony Ericsson Mobile Communications International, is strictly prohibited. Further, no portion of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, without the prior written consent of Sony Ericsson Mobile Communications International, the copyright holder.

First edition (November 2002)

Sony Ericsson Mobile Communications International publishes this manual

without making any warranty as to the content contained herein. Further Sony Ericsson Mobile Communications International reserves the right to make modifications, additions and deletions to this manual due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes will, nevertheless be incorporated into new editions of this manual.

Publication number: LZT 123 7468 P1A

Printed in UK

Contents

Part 1: Overview................................................................................................. 11

1. Introduction............................................................................................................ 13

1.1 Target Users ......................................................................................... 13

1.2 Prerequisites ......................................................................................... 13

1.3 Manual Structure ......................................................................................... 13

2. GM28 Modem......................................................................................................... 14

2.1 Description ......................................................................................... 14

2.2 Highlights ......................................................................................... 14

2.3 GM28 in a Communication System............................................................. 15

2.4 Main Features and Services ......................................................................... 17

2.4.1 Types of Mobile Station .................................................................. 17

2.4.2 Short Message Service .................................................................... 17

2.4.3 Voice Calls...................................................................................... 18

2.4.4 Data................................................................................................. 18

2.4.5 Fax ..................................................................................................18

2.4.6 Supplementary Services .................................................................. 18

2.4.7 Serial Communication .................................................................... 19

2.4.8 Interfacing with the GM28.............................................................. 19

2.5 Service and Support ..................................................................................... 20

2.6 Precautions ......................................................................................... 20

3. Abbreviations .........................................................................................................21

Part 2: Integrating the Modem............................................................................ 23

1. Mechanical Description ......................................................................................... 25

1.1 Overview ......................................................................................... 25

1.2 Physical Dimensions .................................................................................... 27

2. Electrical Description ............................................................................................ 28

2.1 Power Connector ......................................................................................... 28

2.2 Audio Connector ......................................................................................... 29

2.3 Antenna Connector....................................................................................... 31

2.4 SIM Card Reader ......................................................................................... 32

2.5 RS232 Serial Port......................................................................................... 33

2.5.1 Serial Data...................................................................................... 34

2.5.2 Serial Data Signals - RD, TD ......................................................... 34

2.5.3 Control Signals - RTS, CTS, DTR, DSR, DCD, RI ......................... 34

2.6 Real Time Clock ......................................................................................... 35

2.7 Software Updates ......................................................................................... 35

3. Operation ................................................................................................................ 36

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3.1 Switching On the Modem............................................................................. 36

3.2 Switching Off the Modem ............................................................................ 36

3.3 Resetting the Modem.................................................................................... 36

3.4 Operating States/LED................................................................................... 37

4. Hints for Integrating the Modem..........................................................................38

4.1 Safety Advice and Precautions ..................................................................... 38

4.1.1 General............................................................................................38

4.1.2 SIM Card .........................................................................................38

4.1.3 Antenna............................................................................................39

4.2 Installation of the Modem............................................................................. 39

4.2.1 Where to Install the Modem ............................................................39

4.2.2 How to Install the Modem ...............................................................41

4.3 Antenna .......................................................................................... 41

4.3.1 General............................................................................................41

4.3.2 Antenna Type...................................................................................42

4.3.3 Antenna Placement..........................................................................42

4.3.4 The Antenna Cable ..........................................................................42

4.3.5 Possible Communication Disturbances...........................................43

4.4 Attachments .......................................................................................... 43

5. Technical Data ........................................................................................................44

Part 3: Using AT Commands.............................................................................. 49

1. Introduction to AT Commands.............................................................................51

1.1 Overview .......................................................................................... 51

1.2 Syntax Description ....................................................................................... 51

1.2.1 Conventions .....................................................................................51

1.2.2 AT Command Syntax .......................................................................52

1.2.3 AT Response Syntax.........................................................................53

1.3 Error Codes .......................................................................................... 55

1.3.1 +CME ERROR (Mobile Equipment Error Code) ...........................55

1.3.2 +CMS ERROR (Message Service Failure Result Code).................56

1.4 Examples on How to Use the AT Commands............................................. 57

2. Call Control.............................................................................................................59

2.1 AT+CPIN PIN Control ...................................................................... 59

2.2 ATA Answer Incoming Call ..................................................... 59

2.3 ATD Dial................................................................................... 60

2.4 ATH Hang up ............................................................................ 62

2.5 ATO Return to Online Data Mode ............................................ 62

2.6 ATP Select Pulse Dialling ........................................................ 62

2.7 ATT Select Tone Dialling......................................................... 62

2.8 ATX Call Progress Monitoring Control.................................... 63

2.9 AT+CHUP Hang up Call .................................................................... 63

2.10 AT+CMOD Call Mode......................................................................... 64

2.11 AT+CVHU Voice Hang-Up ................................................................ 65

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2.12 AT+VTS DTMF and Tone Generation ........................................... 65

3. Control and Status ................................................................................................. 67

3.1 ATQ Result Code Suppression ................................................. 67

3.2 ATS0 Automatic Answer Control.............................................. 67

3.3 ATS2 Escape Sequence Character ............................................. 68

3.4 ATS3 Command Line Termination Character ........................... 68

3.5 ATS4 Response Formatting Character....................................... 69

3.6 ATS5 Command Line Editing Character (BACKSPACE)........ 70

3.7 ATS6 Blind Dial Delay Control................................................. 70

3.8 ATS7 Connection Completion Timeout .................................... 71

3.9 ATS8 Comma Dial Modifier Delay Control.............................. 71

3.10 ATS10 Automatic Disconnect Delay Control.............................. 72

3.11 AT*ECAM Ericsson Call Monitoring................................................. 72

3.12 AT*EDST Ericsson Daylight Saving Time ....................................... 73

3.13 AT*EMAR Ericsson Master Reset...................................................... 74

3.14 AT*EPEE Ericsson Pin Event........................................................... 74

3.15 AT+CCLK Set Clock and Date .......................................................... 75

3.16 AT+CEER Extended Error Report..................................................... 75

3.17 AT+CFUN Set Phone Functionality................................................... 76

3.18 AT+CIND Indicator Control.............................................................. 77

3.19 AT+CLAC List all available AT Commands ..................................... 78

3.20 AT+CMEE Mobile Equipment Error.................................................. 78

3.21 AT+CMER Mobile Equipment Event Reporting ................................ 79

3.22 AT+CPAS Phone Activity Status ...................................................... 80

3.23 AT+CPIN PIN Control...................................................................... 81

3.24 AT+CPWD Change Password............................................................. 83

3.25 AT+CR Service Reporting Control ............................................... 85

3.26 AT+CRC Cellular Result Code........................................................ 85

3.27 AT+CSAS Save Settings.................................................................... 86

3.28 AT+CSQ Signal Strength................................................................. 87

3.29 AT+CTZU Automatic Time Zone Update ......................................... 88

4. Audio ....................................................................................................................... 89

4.1 AT*E2EAMS Ericsson M2M Audio Profile Modification..................... 89

4.2 AT*E2APR M2M Audio Profile Manipulation................................... 95

4.3 AT*EALR Ericsson Audio Line Request .......................................... 97

4.4 AT*EAMS Ericsson Audio Mode Selection ...................................... 98

4.5 AT*EARS Ericsson Audio Ring Signal............................................. 99

4.6 AT*ELAM Ericsson Local Audio Mode .......................................... 100

4.7 AT*EMIC Ericsson Microphone Mode........................................... 100

4.8 AT*EMIR Ericsson Music Mute Indication Request ...................... 101

4.9 AT*EXVC Ericsson SET External Volume Control........................ 101

5. Data - CSD/HSCSD.............................................................................................. 103

5.1 AT+CBST Select Bearer Service Type............................................ 103

5.2 AT+CRLP Radio Link Protocol....................................................... 105

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6. Data - GPRS..........................................................................................................107

6.1 AT+CGACT PDP Context Activate or Deactivate.............................. 107

6.2 AT+CGATT GPRS Attach or Detach ................................................. 108

6.3 AT+CGDATA Enter Data State.............................................................. 109

6.4 AT+CGDCONT Define PDP Context ....................................................... 110

6.5 AT+CGEREP GPRS Event Reporting .................................................. 112

6.6 AT+CGPADDR Show PDP Address ........................................................ 113

6.7 AT+CGQMIN Quality of Service Profile (Minimum Acceptable)........ 114

6.8 AT+CGQREQ Quality of Service Profile (Requested) .......................... 116

6.9 AT+CGREG GPRS Network Registration Status ............................... 119

6.10 AT+CGSMS Select Service for MO SMS Messages .......................... 120

7. Data - HSCSD .......................................................................................................121

7.1 AT+CHSC HSCSD Current Call Parameters ................................... 121

7.2 AT+CHSD HSCSD Device Parameters............................................ 122

7.3 AT+CHSN HSCSD Non Transparent Call Configuration................ 123

7.4 AT+CHSR HSCSD Parameters Report ............................................ 124

7.5 AT+CHSU HSCSD Automatic User Initiated Upgrading ................ 125

8. Fax..........................................................................................................................127

8.1 AT*E2FAX Ericsson M2M Fax Comm. Baud Rate Modification .... 127

8.2 Low Level Fax Commands......................................................................... 128

9. Identification .........................................................................................................129

9.1 AT Attention Command ....................................................... 129

9.2 AT&F Set to Factory Defined Configuration ............................ 129

9.3 AT&W Store User Profile........................................................... 129

9.4 AT* List all Supported AT Commands.................................. 130

9.5 AT+CGMI Read MS Manufacturer Identification ........................... 130

9.6 AT+CGMM Read MS Model Identification....................................... 130

9.7 AT+CGMR Read MS Revision Identification ................................... 131

9.8 AT+CGSN Read MS Product Serial Number Identification ............ 131

9.9 ATI Identification Information .............................................. 131

9.10 AT+GCAP Request Modem Capabilities List .................................. 132

10. Interface ................................................................................................................133

10.1 AT+CPIN PIN Control .................................................................... 133

10.2 AT&C Circuit 109 (DCD) Control ............................................ 133

10.3 AT&D Circuit 108 (DTR) Response.......................................... 133

10.4 AT&S Circuit 107 (DSR) Response.......................................... 134

10.5 AT+WS46 Mode Selection............................................................... 134

10.6 ATE Command Echo.............................................................. 135

10.7 ATV DCE Response Format................................................... 135

10.8 ATZ Reset to Default Configuration ...................................... 136

10.9 AT+CMUX Switch to 07.10 Multiplex Protocol ............................... 137

10.10 AT+CRES Restore SMS Settings..................................................... 139

10.11 AT+ICF Cable Interface Character Format .................................. 139

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10.12 AT+IFC DTE-DCE Local Flow Control...................................... 140

10.13 AT+ILRR Cable Interface Local Rate Reporting ........................... 141

10.14 AT+IPR Cable Interface Port Command ..................................... 141

10.15 AT*E2ESC M2M Escape Sequence Guard Time ............................. 142

11. Network................................................................................................................. 143

11.1 AT*E2CD Ericsson M2M Cell Description .................................... 143

11.2 AT*E2EMM Ericsson M2M Engineering Monitoring Mode ............. 145

11.3 AT*E2SPN M2M Service Provider Indication ................................. 151

11.4 AT*EALS Ericsson Request ALS Status ........................................ 151

11.5 AT*ECSP Ericsson Customer Service Profile ................................ 152

11.6 AT*EPNR Ericsson Read SIM Preferred Network ......................... 153

11.7 AT*EPNW Ericsson Write SIM Preferred Network ........................ 154

11.8 AT*E2SSN Ericsson M2M SIM Serial Number............................... 154

11.9 AT*ESLN Ericsson Set Line Name................................................. 155

11.10 AT+CIMI Subscriber Identification................................................ 156

11.11 AT+CLCK Facility Lock .................................................................. 156

11.12 AT+CNUM Subscriber Number ........................................................ 158

11.13 AT+COLP Connected Line Identification Presentation................... 159

11.14 AT+COPS Operator Selection ......................................................... 161

11.15 AT+CREG Network Registration..................................................... 162

11.16 AT*ECPI Ciphering Indicator........................................................ 163

11.17 AT*E2NBTS Ericsson M2M Neighbour BTS ..................................... 165

12. Phonebook ............................................................................................................ 167

12.1 AT*E2PBCS Ericsson M2M Phonebook Check Sum......................... 167

12.2 AT*ESAG Ericsson Add to Group .................................................. 167

12.3 AT*ESCG Ericsson Create Group................................................... 168

12.4 AT*ESCN Ericsson Set Credit Card Number.................................. 169

12.5 AT*ESDG Ericsson Delete Group ................................................... 171

12.6 AT*ESDI Ericsson Delete Group Item........................................... 171

12.7 AT*ESGR Ericsson Group Read ..................................................... 172

12.8 AT*EGIR Ericsson Group Item Read............................................. 172

12.9 AT*ESNU Ericsson Settings Number.............................................. 173

12.10 AT+CPBF Phonebook Find............................................................. 174

12.11 AT+CPBR Phonebook Read ............................................................ 174

12.12 AT+CPBS Phone Storage ................................................................ 176

12.13 AT+CPBW Phonebook Write ........................................................... 177

13. Short Message Services - Point to Point............................................................. 179

13.1 AT+CPIN PIN Control.................................................................... 179

13.2 AT+CGSMS Select Service for MO SMS Messages.......................... 179

13.3 AT+CPMS Preferred Message Storage ............................................ 179

13.4 AT+CSCA Service Centre Address.................................................. 181

13.5 AT+CMGF Message Format ............................................................. 182

13.6 AT+CMGW Write Message to Memory ............................................ 182

13.7 AT+CMGS Send Message ................................................................ 185

13.8 AT+CMSS Send From Storage ........................................................ 188

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13.9 AT+CMGC Send Command .............................................................. 189

13.10 AT+CNMI New Message Indications to TE .................................... 192

13.11 AT+CMGR Read Message................................................................. 196

13.12 AT+CMGL List Message................................................................... 201

13.13 AT+CMGD Delete Message .............................................................. 207

13.14 AT+CSDH Show Text Mode Parameters ......................................... 207

13.15 AT+CSMP Set Text Mode Parameters ............................................. 208

13.16 AT+CSCS Select Character Set ....................................................... 209

13.17 AT+CSMS Select Message Service .................................................. 210

14. Short Message Services - Cell Broadcast............................................................213

14.1 AT+CNMI New Message Indications to TE .................................... 213

14.2 AT+CSCB Select Cell Broadcast Message Type ............................. 213

15. SIM Application Toolkit ......................................................................................215

15.1 AT+CPIN PIN Control .................................................................... 215

15.2 AT*E2STKS SIM Application Toolkit Settings .................................. 215

15.3 AT*E2STKD M2M STK Display Text ................................................ 216

15.4 AT*E2STKG M2M STK Get Inkey ..................................................... 217

15.5 AT*E2STKI M2M STK Get Input...................................................... 219

15.6 AT*E2STKL M2M STK Select Item ................................................... 222

15.7 AT*E2STKM M2M STK Set Up Menu................................................ 224

15.8 AT*E2STKN M2M STK Envelope (Menu Selection) ......................... 226

15.9 AT*E2STKC M2M STK Set Up Call .................................................. 226

15.10 *E2STKE STK Send Short Message............................................... 228

15.11 *E2STKP STK Send SS.................................................................. 229

15.12 *E2STKU STK Send USSD ............................................................ 230

15.13 *E2STKR STK Refresh ................................................................... 231

15.14 AT*E2STKTO SIM Application Toolkit Settings .................................. 231

16. Supplementary Services .......................................................................................233

16.1 AT+CPIN PIN Control .................................................................... 233

16.2 AT+CACM Accumulated Call Meter ................................................ 233

16.3 AT+CAMM Accumulated Call Meter Maximum............................... 234

16.4 AT+CAOC Advice of Charge ........................................................... 235

16.5 AT+CPUC Price Per Unit and Currency Table ................................ 236

16.6 AT*EDIF Ericsson Divert Function................................................ 237

16.7 AT*EIPS Identity Presentation Set ................................................ 238

16.8 AT*ELIN Ericsson Line Set............................................................ 239

16.9 AT*E2SSD M2M Supplementary Service Dispatch ......................... 239

16.10 AT*E2SSI M2M Supplementary Service Indications...................... 240

16.11 AT+CCFC Call Forwarding number and Conditions....................... 245

16.12 AT+CCWA Call Waiting ................................................................... 247

16.13 AT+CHLD Call Hold and Multiparty ............................................... 249

16.14 AT+CLIP Call Line Identification Presentation ............................. 250

16.15 AT+CLIR Calling Line Identification Restriction........................... 251

16.16 AT+CSSN Supplementary Service Notification .............................. 253

16.17 AT+CUSD Unstructured Supplementary Service Data .................... 255

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17. Alphabetical Listing of AT Commands ............................................................. 259

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GM28 INTEGRATOR’S MANUAL

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Part 1: Overview

Product Photo/Illustration

1. Introduction

1.1 Target Users

GM28 modems are designed to be integrated into machine-machine or man-to-machine communications applications. They are intended to be used by manufacturers, system integrators, applications developers and developers of wireless communications equipment.

1.2 Prerequisites

It is assumed that the person integrating the GM28 into an application has a basic understanding of the following:

• GSM networking;

• Wireless communication and antennas (aerials);

• AT commands;

• ITU-T standard V.24/V.28;

• Micro controllers and programming;

• Electronic hardware design.

1.3 Manual Structure

The manual is composed of four parts:

Part 1- Overview

This section provides a broad overview of the GM28 and includes a list of abbreviations used in the manual.

Part 2 - Integrating the Modem

This section describes each of the signals available on the GM28 modem, along with mechanical information. The section also provides you with design guidelines and explains what is needed to commercialise an application from a regulatory point of view.

Part 3 - Using AT Commands

This section lists all the AT commands relevant to the GM28, including their associated parameters. The purpose of part 4 is to give you detailed information about the function of each command in the AT command set.

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2. GM28 Modem

2.1 Description

The dual band GSM 850/1900MHz GM28 is a GSM/GPRS serial modem. The modem is a powerful and flexible device that can be used in a wide range of telemetry and telematics applications that rely on the remote exchange of data, voice, SMS or faxes via the GSM cellular network.

Small and lightweight, the GM28 has standard connectors and an integral SIM card reader making it easy and quick to integrate. As well as providing a standard RS232 serial communication interface the GM28 also has an audio interface allowing an analogue handset to be connected. When the GM28 is integrated into an external application, a wireless communications system is created.

A typical end-to-end system consists of a micro controller in an external application communicating, via the GM28 modem, with a remote terminal or host using the GSM network. The micro controller uses a set of AT commands to control the modem, and to set up the end-to-end communications link, via its 9-way RS232 serial interface.

GM28 INTEGRATOR’S MANUAL

2.2 Highlights

GM28 serial modems are intended to be used by manufacturers, system integrators, application developers and developers of a wide range of equipment and business solutions, typically in the following fields:

• Security and alarms

• Vending

• Monitoring and control

• Utilities

• Fleet Management

• Dual band, GSM 850/1900MHz, GSM/GPRS serial modem

• Flexible plug-and-play device

• Data: GPRS, HSCSD, CSD, SMS

• Voice: full rate, enhanced full rate, half rate

• SMS: mobile-originated, mobile-terminated, cell broadcast

• Fax: Group 3, Classes 1 & 2

• RS232 9-way serial interface

• 5V - 32V d.c. input

• 4-wire audio connection

• Antenna connection (FME male)

• FCC and PTCRB approved

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2. GM28 MODEM

2.3 GM28 in a Communication System

Figure 2.1 illustrates the main blocks of a wireless communication system using the GM28. It also shows the communication principles of the system. The definitions in the figure, as used elsewhere in this manual, are in accordance with the recommendations of GSM 07.07.

• The MS (mobile station) represents the GM28 modem plus SIM card. The modem excluding SIM card, is known as the ME (mobile equipment).

• The TE (terminal equipment) is a micro-controller (i.e., a computer) and is a part of the application.

Wireless Communication System

Application

GSM Network

(DTE)

ME status, responses

AT commands to control MS

(GM28)

Figure 2.1 Main Blocks in a Wireless System

In accordance with the recommendations of ITU-T (International Telecommunication Union - Telecommunications Standardisation Sector) V.24, the TE communicates with the MS over a serial interface.

The functions of the GM28 follow the recommendations provided by ETSI (European Telecommunications Standards Institute) and ITU-T.

ETSI specifies a set of AT commands for controlling the GSM element of the modem; these commands are supplemented by Sony Ericsson specific commands.

To find out how to work with AT commands, see “Part 3: Using AT Commands”, page 49.

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Figure 2.2 illustrates the interface between the modem and the application. The entire System Connector Interface is described in detail in “Electrical Description”, page 28.

Power

and signals

Audio

Serial data

(Application)

RJ11

RJ9

DB9

(GM28)

Antenna

connector

Figure 2.2 The Interface between the modem and the Application

Note! ITU-T standards define TE and TA as DTE (Data Terminal Equipment)

and DCE (Data Circuit Terminating Equipment) respectively.

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2. GM28 MODEM

2.4 Main Features and Services

The modem performs a set of telecom services (TS) according to GSM standard phase 2+, ETSI and ITU-T. The services and functions of the modem are implemented by issuing AT commands over the RS232 serial interface.

2.4.1 Types of Mobile Station

The GM28 is a dual band serial modem with the GSM radio characteristics shown in the table below.

GM28 GSM850 GSM1900

Frequency Range (MHz) TX: 824-849

Channel spacing 200 kHz 200kHz

Number of channels

Modulation GMSK GMSK

TX Phase Accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)

Duplex spacing 45MHz 80MHz

Receiver sensitivity at antenna connector

Transmitter output power at antenna connector

Automatic hand-over between GSM850 and GSM1900

2.4.2 Short Message Service

The modem supports the following SMS services:

• Sending; MO (mobile-originated) with both PDU (protocol data unit) and text mode supported.

RX: 869-894

123 carriers *8 (TDMA) GSM: channels 128 to 251

< –102dBm < –102dBm

Class 5

0.8W (29dBm)

TX: 1850-1910 RX: 1930-1990

298 carriers *8 (TDMA) PCS: channels 512 to 810

Class 1 1W (30dBm)

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• Receiving; MT (mobile-terminated) with both PDU and text mode supported.

• CBM (cell broadcast message); a service in which a message is sent to all subscribers located in one or more specific cells in the GSM network (for example, traffic reports). This feature is network dependent.

• SMS STATUS REPORT according to GSM 03.40.

• SMS COMMAND according to GSM 03.40.

The maximum length of an SMS message is 160 characters when using 7-bit encoding. For 8-bit data, the maximum length is 140 characters. The modem supports up to 6 concatenated messages to extend this function.

2.4.3 Voice Calls

2.4.4 Data

GM28 INTEGRATOR’S MANUAL

The GM28 offers the capability of mobile originated and mobile terminated voice calls, as well as supporting emergency calls. Multi-party, call waiting and call deflection features are available. Some of these features are network-operator specific.

For the inter-connection of audio, the modem offers a balanced 4-wire analogue interface.

DTMF (Dual Tone Multi Frequency) is supported.

The modem supports the following data protocols:

• GPRS (General Packet Radio Service). Modems are Class B terminals, which provide simultaneous activation and attachment of GPRS and GSM services. GM28 modems are GPRS class 8 (4+1) enabled devices, which are capable of transmitting in one timeslot per frame (up link), and receiving at a maximum of four timeslots per frame (down link).

• CSD (Circuit Switched Data). GM28 modems are capable of establishing a CSD communication at

9.6kbps.

• HSCSD (High Speed Circuit Switched Data). GM28 supports HSCSD class 2 (2+1) communication, with one timeslot per frame capacity in the up link and two timeslots per frame capacity in the down link.

2.4.5 Fax

The GM28 allows fax transmissions to be sent and received by commercial software installed on the application computer. Group 3 fax Classes 1 and 2 are supported.

2.4.6 Supplementary Services

• Call forwarding

• Call hold, waiting and multiparty

• Calling/called number identification

• Advice of charge

•USSD

• Alternate line service

• Customer service profile

• Preferred networks

• Operator selection

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• Network registration

• Call barring

• Call transfer

2.4.7 Serial Communication

The GM28 enables an end-to-end communication path to be established between the external telemetry/telematics application and a remote terminal or host, via the GSM network. Once a path has been set up, voice or data communication can take place. Serial data with flow control according to the RS232 signalling protocol operates between the modem and the external application.

Control of the GM28 is by the external application, via the RS232 serial interface, using a set of AT commands. The GM28 supports the full set of AT commands according to GSM 07.05 and GSM 07.07. It also supports an extended set of Ericsson proprietary AT commands to add extra functionality.

2. GM28 MODEM

AT commands are used to operate the modem and have a broad range of functions including:

• configuring general parameters of the GM28;

• setting up and controlling communications to and from the GSM network;

• configuring the modem to communicate across the RS232 serial interface;

• and obtaining GSM network status information.

For more detail on the AT commands supported by the GM28 see “Alphabetical Listing of AT Commands”, page 259.

2.4.8 Interfacing with the GM28

The GM28 uses the following industry standard connectors to interface with the external application and the GSM network;

• RJ11 (plug-in power supply connector)

• RJ9 (handset audio connector)

• Integral SIM card reader

• FME male (antenna connector)

• Sub-D socket, 9 pin (RS232 serial port)

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2.5 Service and Support

To contact customer support please use the details below:

Customer Support Sony Ericsson Mobile Communications Maplewood Building Chineham Business Park Basingstoke RG24 8YB

E-mail: modules.support@sonyericsson.com or modules.info@sonyericsson.com

Information about Sony Ericsson and its products is available on the following web site:

http://www.sonyericsson.com/M2M

GM28 INTEGRATOR’S MANUAL

2.6 Precautions

The GM28 as a stand alone item is designed for indoor use only. To use outside it must be integrated into a weatherproof enclosure. Do not exceed the environmental and electrical limits as specified in “Technical Data”, page 44.

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3. Abbreviations

Abbreviation Explanations

AMR Adaptive Multi Rate

CBM Cell Broadcast Message

CBS Cell Broadcast Service

CSD Circuit Switched Data

DCE Data Circuit Terminating Equipment

DTE Data Terminal Equipment

DTMF Dual Tone Multi Frequency

EFR Enhanced Full Rate

EMC Electro-Magnetic Compatibility

3. ABBREVIATIONS

E-OTD Enhanced Observed Time Difference

ESD Electrostatic Discharge

ETSI European Telecommunication Standards Institute

FCC Federal Communications Commission

FR Full Rate

GPRS General Packet Radio Service

GSM Global System for Mobile Communication

HR Half Rate

HSCSD High Speed Circuit Switched Data

ITU-T International Telecommunication Union - Telecommunications

ME Mobile Equipment

MO Mobile Originated

MS Mobile Station

MT Mobile Terminated

PDU Protocol Data Unit

Standardisation Sector

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PTCRB PCS Type Certification Review Board

RF Radio Frequency

RLP Radio Link Protocol

RTC Real Time Clock

SIM Subscriber Identity Module

GM28 INTEGRATOR’S MANUAL

Abbreviation Explanations

SMS Short Message Service

TA Terminal Adapter

TE Terminal Equipment

TS Telecom Services

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Part 2: Integrating the Modem

Product Photo/Illustration

1. Mechanical Description

1.1 Overview

The pictures below show the mechanical design of the GM28 along with the positions of the different connectors and mounting holes. The GM28 case is made of durable PC/ABS plastic.

Antenna

connector

R 232 connectorS

LED

Access to

SIM card

Figure 1.1 GM28 viewed from the left side

Mounting hole (x2)

Power

Audio

connector

Figure 1.2 GM28 viewed from the right side

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GM28 INTEGRATOR’S MANUAL

Please note the following:

• Mounting holes positioned at two of the corners make it possible to securely bolt the modem into your application.

• Keypad, display, microphone, speaker and battery are not part of the modem.

• The SIM card is mounted in the modem.

• The pins and electrical characteristics or the modem’s various connectors are described in “2. Electrical Description”, page 28.

• Information about the antenna connector is found in “2.3 Antenna Connector”, page 31.

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1.2 Physical Dimensions

1. MECHANICAL DESCRIPTION

3.5

51.0

11.0

(x2)

55.3

71.5

10.6

45.3

66.4

9.0

26.2

11.0

77.4

Measurements are given in millimetres. See also “Technical Data”, page 44.

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GM28 INTEGRATOR’S MANUAL

2. Electrical Description

All electrical connections to the GM28 are designed to meet the standard air (4kV) and contact (8kV) discharge ESD tests, of EN 301 489-1.

The modem uses the following industry standard connectors:

• RJ11 6-way (power connector)

• RJ9 4-way (handset connector)

• SIM card reader

• FME male coaxial jack (antenna connector)

• Sub-D socket, 9 pin (RS232 serial port)

2.1 Power Connector

An RJ11 6-way connector, as shown and described below, serves as a means of supplying and controlling d.c. power to the modem.

The supply voltage, VCC, required by the modem is in the range 5V 32V d.c. Application of the supply voltage does not switch the modem on. To do so an additional active-high control signal, TO_IN, must be applied for > 0.2s.

A second active-high control signal, HR_IN, can be used to switch the modem off when applied for 1 - 2 seconds, or can be used to perform a hardware reset when applied for > 3.5s.

TO_IN and HR_IN are referenced to GND (pin 6 on the connector).

VCC and GND are reverse polarity and overvoltage protected.

654321

1 VCC 2 n/c

3 HR_IN 4 TO_IN

5 n/c 6 GND

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2. ELECTRICAL DESCRIPTION

The power connector electrical characteristics are listed below:

Pin Signal Dir Limits Description

1 VCC I 5 - 32V Positive power input

2- - - No connection

3 HR_IN I –0.5 - 32 V Active high control line used to switch

4 TO_IN I –0.5 - 32V Active high control line used to switch

5 - - - No connection

6 GND I - Negative power (ground) input and

2.2 Audio Connector

A 4-way RJ9 connector, as shown below, allows a telephone handset to be plugged into the modem, giving access to the microphone and earpiece signals. The connector may also be used to drive other analogue audio sub-systems or devices.

Although the GM28 is pre-configured to work with a range of handsets, the audio interface is flexible and its performance can be configured, using AT commands, to match a particular handset or audio subsystem.

off or reset the modem VIH > 5V, VIL < 2V

Power off: 1s < t < 2s Hard reset: t > 3.5 s

on the modem V

> 5V, VIL < 2V

Power on: t > 0.2s

return path for TO_IN and HR_IN

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4321

1 MICN 2 BEARN

3 BEARP 4 MICP

GM28 INTEGRATOR’S MANUAL

Audio signal descriptions are listed below:

Pin Signal Dir Description

1 MICN I Microphone negative input

2 BEARN O Earpiece negative output

3 BEARP O Earpiece positive output

4 MICP I Microphone positive input

MICP and MICN are balanced differential microphone input signals. These inputs are compatible with an electret microphone.

BEARP and BEARN are the speaker output signals. These are differential-mode outputs. The electrical characteristics are given in the table below.

Parameter Limit

Output level (differential) t4.0V Output level (dynamic load = 32:) t2.8V Distortion at 1kHz and maximum output level d5%

Offset, BEARP to BEARN ±30mV

Ear-piece mute-switch attenuation t40dB

The following table shows the ear piece impedances that can be connected to BEARP and BEARN.

Ear piece model Impedance Tolerance

Dynamic ear piece [32:+ 800µH] // 100pF ±20% Dynamic ear piece [150:+ 800µH] // 100pF ±20% Piezo ear piece 1k:+ 60nF ±20%

Note! Compliance with AMR may be required by certain network operators.

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2.3 Antenna Connector

The antenna connector allows transmission of radio frequency (RF) signals between the modem and an external customer-supplied antenna.

The modem is fitted with a 50: FME male coaxial jack as shown

below.

2. ELECTRICAL DESCRIPTION

RF Signal

GND

The table below shows the antenna electrical characteristics:

Parameter Limit Description

Nominal impedance 50: (SWR better than

Output Power

Static Sensitivity

2.5:1)

2 Watt peak (Class 4) GSM850

1 Watt peak (Class 1) GSM1900

Better than –102 dBm GSM850

Better than –102 dBm GSM1900

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2.4 SIM Card Reader

The GM28 is fitted with a SIM card reader designed for 3 V and 5 V SIM cards. It is the flip-up type which is lockable in the horizontal position and is accessed through a removable panel as shown below.

GM28 INTEGRATOR’S MANUAL

The SIM card reader includes a SIM presence switch. This ensures that when a SIM card is inserted or removed while the GM28 is turned ON, it will reset.

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2.5 RS232 Serial Port

The modem supports a standard RS232 serial interface (EIA/TIA 574) via its 9 pin Sub-D connector, shown below. In line with serial communication terminology the GM28 serial modem should be considered as the data circuit-terminating equipment (DCE) and the external application or computer as the data terminating equipment (DTE).

2. ELECTRICAL DESCRIPTION

54321

1 DCD 2RD 3TD

4 DTR 5 GND 6 DSR

7RTS 8 CTS 9RI

The electrical characteristics of the serial port signals are shown below:

Pin Signal Dir Voltage

levels

1 DCD O > +4 V

< –4V

2 RD O > +4V

< –4V

3 TD I > 2V

< 0.8V

4 DTR I > 2V

< 0.8V

5 GND - 0V Ground connection

6DSR O > +4V

< –4V

7 RTS I > 2 V

< 0.8V

Description

Data carrier detect

Received data

Transmitted data

Data terminal ready

Data set ready

Request to send

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8 CTS O > +4 V

< –4V

9 RI O > +4 V

< –4V

Clear to send

Ring indicator

2.5.1 Serial Data

The modem supports the standard data character format of 1 start bit, 8 bit data, no parity plus 1 stop bit, in total 10 bits per character.

2.5.2 Serial Data Signals - RD, TD

The default baud rate is 9.6kbps, however higher bit rates up to 460kbps are supported. At start-up the GM28 transmits and receives data at the default rate of 9.6kbps in either standard AT mode or binary mode (the first received data - AT or binary format - determines the operating mode). When reprogramming, the transmission rate is automatically negotiated by the programming application. Speeds up to 460 kbps are supported.

Serial Data From Modem (RD)

RD is an output signal that the modem uses to send data to the application.

GM28 INTEGRATOR’S MANUAL

Serial Data To Modem (TD)

TD is an input signal, used by the application to send data to the modem.

2.5.3 Control Signals - RTS, CTS, DTR, DSR, DCD, RI

RTS and CTS are capable of transmitting at 1/10 th of the data transmission speed for data rates up to 460kbps (byte-oriented flow control mechanism).

Request to Send (RTS)

Used to condition the DCE for data transmission. The default level is high by internal pull up.

The exact behaviour of RTS is defined by an AT command. Software or hardware control can be selected. Hardware flow is the default control.

The application must pull RTS low to communicate with the modem. The modem will respond by asserting CTS low, indicating it is ready for communication.

Clear To Send (CTS)

CTS indicates that the DCE is ready to transmit data. The default level is high. You can define the exact behaviour of CTS through an AT command, and can select software or hardware flow control.

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2. ELECTRICAL DESCRIPTION

Data Terminal Ready (DTR)

DTR indicates that the DTE is ready to transmit and receive data. It also acts as a hardware ‘hang-up’, terminating calls when switched high. The signal is active low. You can define the exact behaviour of DTR with an AT command.

The DTR line can also be used to switch on the modem when activated for 0.2 seconds. The DTR line must be deactivated prior to switching off the modem to ensure it switches off (powers down) correctly.

Data Set Ready (DSR)

An active DSR signal is sent from the modem to the application (DTE) to confirm that a communications path has been established. DSR has two modes of operation, which can be set using the AT command AT&S.

Data Carrier Detect (DCD)

DCD indicates that the DCE is receiving a valid carrier (data signal) when low. You can define the exact behaviour of DCD with an AT command.

Ring Indicator (RI)

RI indicates that a ringing signal is being received by the DCE when low. You can define the exact behaviour or RI with an AT command.

2.6 Real Time Clock

The GM28 contains a real time clock (RTC) to maintain accurate timekeeping and to enable “timestamping” of messages.

The RTC is powered when d.c. power is connected to the modem AND the modem is switched on. If the d.c. supply fails, a stored energy device within the GM28 provides back-up power to maintain the RTC for at least 12 hours.

2.7 Software Updates

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It is possible and sometimes necessary to update the GM28 software. Updates must be carried out by a Sony Ericsson approved technician. Please contact your supplier for details (see “Service and Support”, page 20).

GM28 INTEGRATOR’S MANUAL

3. Operation

3.1 Switching On the Modem

There are two ways to switch on the modem, once power is applied.

• either assert TO_IN high for > 0.2s;

• or activate the RS232 control line DTR, high for > 0.2s.

The modem is fully operational after 4 seconds. Logging onto a network may take longer than this and is outside the control of the modem.

The modem can be configured to start up at the time power is applied by permanently tying power connector signals TO_IN (pin 4) and VCC (pin 1) together. In this case DTR must be used to switch the modem on again after it has been switched off or reset, while power is still applied.

3.2 Switching Off the Modem

There are two ways to switch off (power down) the modem as described below:

• either use the AT+CFUN command;

• or assert HR_IN high for 1 - 2 seconds. A delay of up to 10s is experienced as the modem logs off the network.

Note! The DTR line must be deactivated prior to switching off the modem to

ensure the unit switches off correctly.

3.3 Resetting the Modem

A full system reset, independent of the status of the software, may be applied to the modem as follows:

• assert HR_IN high for > 3.5s.

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3.4 Operating States/LED

The modem has a green LED, as depicted below, which is used to indicate various operating states. These states are described in following table.

3. OPERATION

LED

Operating State LED Status

After switching on the modem On after 4s

Switch off (Power down) or power removed Off

Standby or talk Flashing

No network, network search, no SIM card, no PIN entered

Notes! Switch off (Power Down): DC power is applied but the modem is

switched OFF.

Standby: The GM28 is switched ON and camped on to the network. No call in progress.

Talk: The GM28 is switched ON and a voice/data call is in progress.

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GM28 INTEGRATOR’S MANUAL

4. Hints for Integrating the Modem

This chapter gives you advice and helpful hints on how to integrate the GM28 into your application from a hardware perspective.

Please read and consider the information under the following headings before starting your integration work:

• Safety advice and precautions.

• Installation of the modem.

• Antenna.

4.1 Safety Advice and Precautions

4.1.1 General

• Always ensure that use of the modem is permitted. The modem may present a hazard if used in proximity to personal medical electronic devices. As a rule, the modem must not be used in hospitals, airports or planes.

• Avoid exposing the modem to lighted cigarettes, naked flames or to extreme hot or cold temperature.

• You are responsible for observing your country’s safety standards, and where applicable the relevant wiring rules.

• Never use the modem at a gas station, refuelling point, blasting area or in any other environment where explosives may be present.

• Operating the modem close to other electronic devices, such as antennas, television sets, and radios may cause electromagnetic interference.

• Never try to dismantle the modem yourself. There are no components inside the modem that can be serviced by the user. If you attempt to dismantle the modem, you may invalidate the warranty.

• To protect power supply cables and meet the fire safety requirements when the unit is powered from a battery or a high current supply, connect a fast 1.25A fuse in line with the positive supply.

• Do not connect any incompatible component or product to the GM28. Note, Sony Ericsson does not warrant against defects, nonconformities or deviations caused thereby.

4.1.2 SIM Card

• Before handling the SIM card in your application, ensure that you are not charged with static electricity. Use proper precautions to avoid electrostatic discharges.

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4.1.3 Antenna

4. HINTS FOR INTEGRATING THE MODEM

• When the SIM card hatch is opened, the SIM card connectors lie exposed under the SIM card holder. CAUTION: Do not touch these connectors! If you do, you may release an electrical discharge that could damage the modem or the SIM card.

• When designing your application, the SIM card’s accessibility should be taken into account. We always recommend that you have the SIM card protected by a PIN code. This will ensure that the SIM card cannot be used by an unauthorized person.

• If the antenna is to be mounted outside, consider the risk of lightning. Follow the instructions provided by the antenna manufacturer.

• Never connect more than one modem to a single antenna. The modem can be damaged by radio frequency energy from the transmitter of another modem.

• Like any mobile station, the antenna of the modem emits radio frequency energy. To avoid EMI (electromagnetic interference), you must determine whether the application itself, or equipment in the application’s proximity, needs further protection against radio emission and the disturbances it might cause. Protection is secured either by shielding the surrounding electronics or by moving the antenna away from the electronics and the external signals cable.

• The modem and antenna may be damaged if either come into contact with ground potentials other than the one in your application. Beware, ground potential are not always what they appear to be.

• If the application containing the GM28 uses an antenna which is less than 20cm away from any part of the user’s body, integrators are legally obliged to publish SAR figures for the product. SAR testing is the responsibility of the system integrator.

• Even if SAR measurements are not required it is considered good practice to insert a warning in any manual produced, indicating it is a radio product and that care should be taken.

• The GM28 module is FCC approved for fixed and mobile applications. If the final product after integration is intended for portable use, a new application and FCC ID is required.

4.2 Installation of the Modem

4.2.1 Where to Install the Modem

There are several conditions which need to be taken into consideration when designing your application as they might affect the modem and its function. They are:

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GM28 INTEGRATOR’S MANUAL

Environmental Conditions

The modem must be installed so that the environmental conditions stated in the Technical Data chapter, such as temperature, humidity and vibration are satisfied. Additionally, the electrical specifications in the Technical Data section must not be exceeded.

Signal Strength

The modem has to be placed in a way that ensures sufficient signal strength. To improve signal strength, the antenna can be moved to another position. Signal strength may depend on how close the modem is to a radio base station. You must ensure that the location at which you intend to use the modem, is within the network coverage area.

Degradation in signal strength can be the result of a disturbance from another source, for example an electronic device in the immediate vicinity. More information about possible communication disturbances can be found in section 4.3.5, page 43.

When an application is completed, you can verify signal strength by issuing the AT command AT+CSQ. See “AT+CSQ Signal Strength”, page 87.

Tip! Before installing the modem, use an ordinary mobile telephone to check

a possible location for it. In determining the location for the modem and antenna, you should consider signal strength as well as cable length

Connection of Components to GM28

The integrator is responsible for the final integrated system. Incorrectly designed or installed, external components may cause radiation limits to be exceeded. For instance, improperly made connections or improperly installed antennas can disturb the network and lead to malfunctions in the modem or equipment.

Network and Subscription

• Before your application is used, you must ensure that your chosen network provides the necessary telecommunication services. Contact your service provider to obtain the necessary information.

• If you intend to use SMS in the application, ensure this is included in your (voice) subscription.

• Consider the choice of the supplementary services described in section “2.4.2 Short Message Service”, page 17.

• Please be aware that compliance with AMR may be required by certain network operators.

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4. HINTS FOR INTEGRATING THE MODEM

4.2.2 How to Install the Modem

Power Supply

• Use a high-quality power supply cable with low resistance. This ensures that the voltages at the connector pins are within the allowed range, even during the maximum peak current.

• When the unit is powered from a battery or a high current supply, connect a fast 1.25A fuse in line with the positive supply. This protects the power cabling and modem.

Securing the modem

• Before securing the modem take into account the amount of additional space required for the mating connectors and cables that will be used in the application.

• Where access is restricted, it may be easier to connect all the cables to the modem prior to securing it in the application.

Caution! Do not exceed a torque of 25Ncm when tightening the fixings screws.

4.3 Antenna

• Securely attach the GM28 modem to the host application using two 3mm diameter pan-head screws of appropriate length as shown below.

Excessive torque applied to the screws can crack the plastic case.

4.3.1 General

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The antenna is the component in your system that maintains the radio link between the network and the modem. Since the antenna transmits and receives electromagnetic energy, its efficient function will depend on:

• the type of antenna (for example, circular or directional);

• the placement of the antenna;

4.3.2 Antenna Type

GM28 INTEGRATOR’S MANUAL

• communication disturbances in the vicinity in which the antenna operates.

In the sections below, issues concerning antenna type, antenna placement, antenna cable, and possible communication disturbances are addressed.

In any event, you should contact your local antenna manufacturer for additional information concerning antenna type, cables, connectors, antenna placement, and the surrounding area. You should also determine whether the antenna needs to be grounded or not. Your local antenna manufacturer might be able to design a special antenna suitable for your the application.

Make sure that you choose the right type of antenna for the modem. Consider the following requirements:

• the antenna must be designed for the dual frequency bands in use: GSM850/1900;

• the impedance of the antenna and antenna cable must be 50:;

• the antenna output-power handling must be a minimum of 2W;

• the VSWR value should be less than 3:1 to avoid damage to the modem.

4.3.3 Antenna Placement

The antenna should be placed away from electronic devices or other antennas. The recommended minimum distance between adjacent antennas, operating in a similar radio frequency band, is at least 50cm.

If signal strength is weak, it is useful to face a directional antenna at the closest radio base station. This can increase the strength of the signal received by the modem.

The modem’s peak output power can reach 2 W. RF field strength varies with antenna type and distance. At 10cm from the antenna the field strength may be up to 70V/m and at 1m it will have reduced to 7V/m.

4.3.4 The Antenna Cable

Use 50:impedance low-loss cable and high-quality 50:impedance

connectors (frequency range up to 2GHz) to avoid RF losses. Ensure that the antenna cable is as short as possible.

The Voltage Standing-Wave Ratio (VSWR) may depend on the effectiveness of the antenna, cable and connectors. In addition, if you use an adapter between the antenna cable and the antenna connector, it is crucial that the antenna cable is a high-quality, low-loss cable.

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4. HINTS FOR INTEGRATING THE MODEM

Minimize the use of extension cables, connectors and adapters. Each additional cable, connector or adapter causes a loss of signal power.

4.3.5 Possible Communication Disturbances

Possible communication disturbances include the following:

• Noise can be caused by electronic devices and radio transmitters.

• Path-loss occurs as the strength of the received signal steadily decreases in proportion to the distance from the transmitter.

• Shadowing is a form of environmental attenuation of radio signals caused by hills, buildings, trees or even vehicles. This can be a particular problem inside buildings, especially if the walls are thick and reinforced.

• Multi-path fading is a sudden decrease or increase in the signal strength. This is the result of interference caused when direct and reflected signals reach the antenna simultaneously. Surfaces such as buildings, streets, vehicles, etc., can reflect signals.

• Hand-over occurs as you move from one cell to another in the GSM network. Your mobile application call is transferred from one cell to the next. Hand-over can briefly interfere with communication and may cause a delay, or at worst, a disruption.

4.4 Attachments

The GM28 has been FCC certified using a number of attachments including:

1. AC-DC Power Adaptor with Customized DC Lead (Model # AD-0901000BS) Input 230Va.c., 50Hz, 2m mains lead Output: 9Vd.c. 1A, 2m d.c. lead with RJ11 connector. CE marked.

2. Tri-band GSM Antenna (GSM/PCN/1.9GHz) (Model # DG300-FME/F) Covert fit spider patch antenna, self-adhesive pad, 0dBi, 2m RG174 cable with FME female connector.

3. RS232 9-way Serial Cable (Model # C-E-RS232-2M) 2m, 9-way cable, DB9 (female) to DB9 (male) connectors.

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5. Technical Data

Data Features

CSD Up to 9.6kbps

HSCSD (2+1) Up to 19.2kbps

GM28 INTEGRATOR’S MANUAL

GPRS Class B (4+1)

- P channels

- Coding schemes CS1 - CS4

GSM 07.10 multiplexing protocol

Short Message Service Features

SMS

Voice Features

85.6kbps (subject to network support and terminal location)

Text and PDU

Point to point (MT/MO)

Cell broadcast

concatenation of up to 6 SMS

Full Rate, Enhanced Full Rate and Half Rate (FR/EFR/HR)

Dual Tone Multi Frequency (DTMF

AMR currently unsupported

Fax Features

Group 3

Class 1 and 2

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5. TECHNICAL DATA

Data Storage

SMS storage capacity 40 in ME

In addition, the unit can handle as many SMS as the SIM can store

Phone book capacity 100

Power Supply

Supply voltage range 5 - 32V d.c.

Power Consumption

Supply voltage 5V 12V 32V Vdc

Power Down Mode

Av Max Av Max Av Max

5 15 5 15 20 50 µA

Standby Mode (typical)

Frequency Paging rate Av Peak Av Peak Av Peak

850MHz 2 26 110 9 43 6 20 mA

1900MHz 2 26 120 9 45 6 19 mA

Talk Mode (typical)

Frequency Power Level Av Peak Av Peak Av Peak

850MHz 5 220 1230 90 520 40 200 mA

1900MHz 0 170 960 70 350 30 140 mA

Notes! Power Down Mode: DC power is applied but the modem is switched

OFF.

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Standby Mode: The GM28 is switched ON and camped on to the network. No call in progress.

Talk Mode: The GM28 is switched ON and a voice/data call is in progress.

The power consumption during transmission in Talk Mode is measured at maximum transmitted power.

GM28 INTEGRATOR’S MANUAL

The power consumption in Standby Mode is measured at the maximum paging rate.

Radio Specifications

Frequency range GM28: GSM 850MHz and 1900MHz (dual band)

Maximum RF output power

Antenna impedance 50 :

Static sensitivity Better than –102dBm

E-OTD Currently unsupported in GM28

Audio Specifications

Parameter Limit

Output level (differential) t4.0V Output level (dynamic load = 32:) t2.8V Distortion at 1kHz and maximum output level d5%

Offset, BEARP to BEARN ±30mV

Ear-piece mute-switch attenuation t40dB

2W (850MHz) and 1W (1900MHz)

Ear piece model Impedance Tolerance

Dynamic ear piece [32:+ 800µH] // 100pF ±20% Dynamic ear piece [150:+ 800µH] // 100pF ±20% Piezo ear piece 1k:+ 60nF ±20%

SIM Card Reader

Voltage type Support for 3 V and 5 V SIM cards

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5. TECHNICAL DATA

Electrical Connectors and LED

Plug-in power supply connector

Handset audio connector RJ9 4-way

Antenna connector FME male

RS232 port Sub-D socket, 9 pin

LED Green

Mechanical Specification

Length 77.4mm

Width 66.4mm

Height 26.2mm

Weight <130g

RJ11 6-way

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GM28 INTEGRATOR’S MANUAL

Environmental specifications

Operating temperature range

Storage temperature range

Relative humidity 5 - 95%, non-condensing

Stationary vibration, sinusoidal

Stationary vibration, random

Non-stationary vibration, including shock

Bump Acceleration: 250m/s²

Free fall transportation 1.2m

–25°C to +55°C

–40°C to +85°C

Displacement: 7.5mm

Acceleration amplitude: 20m/s² and 40m/s²

Frequency range: 2-8Hz, 8-200Hz, 200-500 Hz

Acceleration spectral density (m²/s²):

0.96, 2.88, 0.96

Frequency range: 5-10Hz, 10-200Hz, 200-500Hz, 60min/axis

Shock response spectrum I, peak acceleration: 3 shocks in each axis and direction; 300m/s², 11ms

Shock response spectrum II, peak acceleration: 3 shocks in each axis and direction; 1000m/s², 6ms

Rolling pitching transportation

Static load 10kPa

Low air pressure/high air pressure

Certification

FCC Certification

Approved to PTCRB according to NAPRD.03 and GSM 3GPP TS 51.010-1

Angle: ±35degrees; period: 8s

70kPa/106kPa

Part 15

Part 22

Part 24

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Part 3: Using AT Commands

Product Photo/Illustration

1. Introduction to AT Commands

1.1 Overview

AT commands, issued from a computer in your application are used to control and implement the functions of the modem.

Using AT commands, the following actions are possible:

• Control of DCE

•GPRS

• Call control

• Supplementary Service

• SIM application tool kit

The GM28 contains a large number of Ericsson-specific commands in addition to those implemented in accordance with the GSM and ITU-T recommendations. These commands are provided to enhance the functions of the modem. The Ericsson-specific commands are identified by the asterisk that precedes the command (see the syntax description provided below).

1.2 Syntax Description

This section provides a brief description of the syntax used for the GM28, AT command set. See the ITU-T recommendation V.25ter for additional information.

1.2.1 Conventions

In this manual, the following conventions are used to explain the AT commands.

<command> The name of the command that is to be entered.

<parameter> The parameter values that are defined for a certain

<CR> The command line is terminated by the Carriage

<LF> Line feed character or ATS4 command.

< > The term enclosed in angle brackets is a syntactical

command.

Return (or Enter key) or ATS3 command.

element. The brackets do not appear in the command line.

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[ ] Square brackets are used to indicate that a certain item

Value The default values of the supported parameters are

• Other characters, including ‘?’, ‘ ’, parenthesis, etc., appear in

commands and responses as written.

• The final result codes OK, ERROR, +CME ERROR: <err> and CMS ERROR:<err> (see sections 1.2.3, AT Response Syntax and

1.3, Error Codes) are not listed under “Possible Responses” for each AT command.

• OK and ERROR are listed if these are the only possible responses.

1.2.2 AT Command Syntax

GM28 INTEGRATOR’S MANUAL

is optional. For example, sub-parameters of a command or an optional part of a response. The brackets do not appear in the command line.

indicated by using bold text when presenting the value.

The AT standard is a line-oriented command language. Each command is made up of the following three elements:

• the prefix;

• the body;

• the termination character.

The prefix consists of the letters “AT”, which are derived from the first two letters of the word attention. The body is made up of the command, the parameter, and if applicable the associated values.

Commands may be combined in the same command line. Spaces between the individual bodies are ignored.

Basic Syntax Command

The format of basic syntax commands is as follows:

AT<command>[=][<parameter>]<OK>

Example! ATL=0<CR> (sets the volume of the speaker)

Additional commands may follow a command on the same command line without any character being required for separation. For the command D parameters, see the description for the command in question.

A version of the basic syntax is:

AT<command><parameter>

Extended Syntax Command

• AT+<command>= [<parameter>]

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1. INTRODUCTION TO AT COMMANDS

• AT*<command>=[<parameter>]

Example! AT+CFUN=0<CR> (powers down the modem)

If several values are included in the command, they are separated by commas. It is also possible to enter commands with no values.

Additional commands may follow an extended syntax command on the same command line if a semicolon (; IRA 3B) is inserted after the preceeding extended command as a separator.

Read Command Syntax

The read command is used to check the current values of parameters. Type ‘?’, after the command line:

• AT+<command>?

• AT*<command>?

• AT<command>?

Example! AT+CSCS?<CR> (show current character set)

<CR>“IRA”<CR>(information text response)

<CR>OK<CR>(final result code response)

Test Command Syntax

The test command is used to test whether the command has been implemented or to give information about the type of subparameters it contains. Type ‘?’, after the command line:

• AT+<command>=?

• AT*<command>=?

Example! AT+CPAS=?<CR> (shows supported values for the response

parameters)

<CR>CPAS: (0, 3, 4, 129, 130, 131)<CR> (supported values)

<CR>OK<CR> (final result code)

If the indicated <parameter> is not recognized, the result code ERROR is issued.

Note! Possible responses are indicated both as <command>:(list of

supported<parameter>) and (in most cases) the actual range of the parameter values.

1.2.3 AT Response Syntax

The default mode response shown below, is in text mode. See the command V for further details.

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Possible formats for the result codes are:

• Basic format result code, such as OK. The Basic result code also has a numerical equivalent.

• Extended format result code, prefixed with a plus sign (+) or an asterisk (*):

– AT+<command>: <parameter >

– AT*<command>: <parameter>

where the <parameter> is the result code value, note that a single

space character separates the colon character from the <parameter>

If several values are included in the result code, they are separated by commas. It is also possible that a result code has no value. The extended syntax result codes have no numerical equivalent. They are always issued in alphabetical form.

• Information text response may contain multiple lines separated by <CR>. The TE detects the end of informational text responses by looking for a final result code response, such as OK.

There are two types of result code responses as outlined below:

Final Result Code

A final result code indicates to the TE that execution of the command is completed and another command may be issued.

• If you type an implemented AT command, you should get the result code OK.

• If you type an AT command that is not implemented, or which had the wrong parameter or syntax, you will get an error result code. It is ERROR or, for example, +<command> ERROR followed by an error code.

Final result codes are:

Value General meaning

OK Command executed, no errors

ERROR Invalid command or command line too long

NO DIALTONE No dialling possible, wrong mode

BUSY Remote station busy

NO ANSWER Connection completion time-out

NO CARRIER Link not established or disconnected

Unsolicited Result Code

Unsolicited result codes indicate the occurrence of an event not directly associated with a command being issued from the TE.

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1. INTRODUCTION TO AT COMMANDS

1.3 Error Codes

1.3.1 +CME ERROR (Mobile Equipment Error Code)

This final result code is similar to the regular ERROR result code. If +CME ERROR: <err> is the result code for any of the commands in a command line, none of the commands in the same command line will be executed (neither ERROR nor OK result code shall be returned as a result of a completed command line execution). The format of <err> can be either numerical or alphabetical, and is set with the +CMEE command.

The table below provides the numerical values for the parameter <err>.

<err> Description Syntax

0 Phone failure

1 No connection to phone

2 Phone -adaptor link reserved

3 Operation not allowed

4 Operation not supported

5 PH-SIM PIN required

10 SIM not inserted

11 SIM PIN required

12 SIM PUK required

13 SIM failure

14 SIM busy

15 SIM wrong

16 Incorrect password

17 SIM PIN2 required

18 SIM PUK2 required

20 Memory full

21 Invalid index

22 Not found

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23 Memory failure

24 Text string too long

25 Invalid characters in text string

26 Dial string too long

27 Invalid characters in dial string

30 No network service

GM28 INTEGRATOR’S MANUAL

<err> Description Syntax

31 Network time-out

32 Network not allowed - emergency calls only

100 Unknown

101- 255 Reserved by ETS

1.3.2 +CMS ERROR (Message Service Failure Result Code)

This final result code indicates an error related to mobile equipment or to the network. The operation is similar to the ERROR result code. None of the following commands in the same command line will be executed. Neither ERROR nor OK result code will be returned. ERROR is returned normally when an error is related to syntax or invalid parameters. Nevertheless, it always appears when a command fails.

The syntax is as follows:

+CMS ERROR: <err>

Values for the <err> parameter are described in the following table.

<err> Description

0 - 127 GSM 04.11 Annex E-2 values

128 - 255 GSM 03.40 subclause 9.2.3.22 values

300 ME failure

301 SMS service of ME reserved

302 Operation not allowed

303 Operation not supported

304 Invalid PDU mode parameter

305 Invalid text mode parameter

310 SIM not inserted

311 SIM PIN required

312 PH-SIM PIN required

313 SIM failure

314 SIM busy

315 SIM wrong

316 SIM PUK required

317 SIM PIN2 required

318 SIM PUK2 required

320 Memory failure

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1. INTRODUCTION TO AT COMMANDS

<err> Description

321 Invalid memory index

322 Memory full

330 SMSC address unknown

331 No network service

332 Network time-out

340 No +CNMA acknowledgment expected

500 Unknown error

- 511 Other values in range 256 - 511 are reserved

512- Manufacturer specific

1.4 Examples on How to Use the AT Commands

After every group of AT commands there is a section where some of the more complicated commands are exemplified. For a detailed description of the command in question (valid parameter values, AT command syntax and Response syntax) you are recommended to see its own descriptive section.

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2. Call Control

2.1 AT+CPIN PIN Control

See 3.23, AT+CPIN PIN Control

2.2 ATA Answer Incoming Call

Description Command Possible Responses

Answer an incoming call

ATA •CONNECT

• CONNECT <text>

•NO CARRIER

•ERROR

•OK

Answer and initiate connection to an incoming call.

<text> Description

19200 Connected with data bit rate of 19200 bits/s (HSCSD)

9600 Connected with data bit rate of 9600 bits/s

4800 Connected with data bit rate of 4800 bits/s

2400 Connected with data bit rate of 2400 bits/s

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2.3 ATD Dial

Description Command Possible Responses

GM28 INTEGRATOR’S MANUAL

• Originate a call and dial the phone number specified in the command as <dial_string> or

•Do a network detect

Dial the phone number stored in the mobile phone which is located by the index

Dial the phone number stored in the SIM card which is located by the index

Dial the phone number stored in the Last dialled number list on the SIM card, which is located by the index The most recently dialled number is assumed to have ="1"

ATD<dial_string>[;] •CONNECT

• CONNECT <text>

•NO CARRIER

•ERROR

• NO DIAL TONE

•BUSY

•OK

ATD>ME[;] • CONNECT

• CONNECT <text>

•NO CARRIER

•ERROR

• NO DIAL TONE

•BUSY

•OK

ATD>SM[;] •CONNECT

• CONNECT <text>

•NO CARRIER

•ERROR

• NO DIAL TONE

•BUSY

•OK

ATD>LD[;] • CONNECT

• CONNECT <text>

•NO CARRIER

•ERROR

• NO DIAL TONE

•BUSY

•OK

Redial the last phone number dialled.

Ericsson specific

ATDL[;] ...

Used to initiate a phone connection, which may be data or voice (phone number terminated by semicolon). The phone number used to establish the connection will consist of digits and modifiers, or a stored number specification.

If the dial string is followed by a semicolon this informs the phone that the number is a voice rather than a data number.

If the dial string is omitted, and the semicolon included, the command instructs the ME to do a network detect. If the network is available OK is returned.

Abortability:

Aborting an ATD command is accomplished by the transmission from the DTE to the DCE of any character. A single character shall be sufficient to abort the command in progress; however, characters

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2. CALL CONTROL

transmitted during the first 125 milliseconds after transmission of the termination character are ignored. This is to allow the DTE to append additional control characters such as line feed after the command line termination character.

<dial_string> Description

“0 1 2 3 4 5 6 7 8 9 * # +”

W The W modifier is ignored but is included only for

, The comma modifier is ignored but is included only for

T The T modifier is ignored but is included only for

P The P modifier is ignored but is included only for

CONNECT If connection is successfully established, only valid for data

CONNECT <text>

NO CARRIER Unable to establish a connection or the connection

ERROR An unexpected error occurred while trying to establish the

Valid characters for origination

compatibility purposes

Description

connections

If connection is successfully established, only valid for data connections

attempt was aborted by the user

connection

NO DIALTONE The mobile phone is being used for a voice call or is not

BUSY The phone number called is engaged, valid for data and

OK Only valid for voice connections

<text> Description

19200 Connected with data bit rate of 19200 bits/s (HSCSD)

9600 Connected with data bit rate of 9600 bits/s

4800 Connected with data bit rate of 4800 bits/s

2400 Connected with data bit rate of 2400 bits/s

within coverage of the network

voice connections

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2.4 ATH Hang up

Description Command Possible Responses

Terminate the call ATH •ERROR

Signals the MS to terminate an active call.

2.5 ATO Return to Online Data Mode

Description Command Possible Responses

•OK

Return to on-line data mode

ATO[<value>] •CONNECT

Switch to the on-line data mode from the on-line command mode during an active call. Returns ERROR when not in on-line command mode.

<value> Description

0 Return to on-line data state from on-line command

2.6 ATP Select Pulse Dialling

Description Command Possible Responses

Select pulse dialling ATP OK

Show if the command is supported?

Command is ignored, and is implemented for compatibility only. It would normally cause the next D command to use pulses when dialling the number.

ATP=? OK

• CONNECT <text>

•NO CARRIER

•ERROR

2.7 ATT Select Tone Dialling

Description Command Possible Responses

Select tone dialling ATT OK

Show if the command is supported?

Command is ignored, and is implemented for compatibility only. It would normally cause the next D command to use tones when dialling the number.

ATT=? OK

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2. CALL CONTROL

2.8 ATX Call Progress Monitoring Control

Description Command Possible Responses

Set call progress monitoring control

Read the current setting

Show if the command is supported?

ATX=[<n>] or ATX[<n>] •OK

•ERROR

ATX? X: <n>

ATX=? X: (list of supported

<n>s)

Defines if the dial-tone detection and busy-tone detection are to be used during a call set-up.

<n> Description

0 Body and dial tone detection off. No line speed reported

1 Body and dial tone detection off. Report line speed on

2 Busy detection on and dial tone detection off. Report line

3 Busy detect off and dial tone on. Report line speed on

4 Busy detect and dial tone detection on. Report line

on connection

connection

speed on connection

connection

speed on connection. Default value

Note! If there is no network available the <n> parameter will decide if “NO

DIALTONE” or “NO CARRIER” will be returned. If the call recipient is busy, the <n> parameter will decide if “BUSY” or “NO CARRIER” will be returned.

2.9 AT+CHUP Hang up Call

Description Command Possible Responses

Request hang-up AT+CHUP •OK

Show if the commands is supported

Causes the TA to hang-up the current call of the ME.

If no call is present, but an incoming call is notified, then the incoming call shall be rejected.

•ERROR

AT+CHUP=? • OK

•ERROR

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2.10 AT+CMOD Call Mode

Description Command Possible Responses

Request Call Mode AT+CMOD=[<mode>] •OK

•ERROR

Shows the current setting

Show if the command is supported

AT+CMOD? • +CMOD: <mode>

•OK

•ERROR

AT+CMOD=? • +CMOD: (list of

supported <mode>s)

•OK

•ERROR

Selects the call mode of further dialing commands (D) or for next answering command (A). Mode can be either single or alternating. In this ETS, terms “alternating mode” and “alternating call” refer to all GSM bearer and teleservices that incorporate more than one basic service (voice, data, fax) within one call.

When single mode is selected the call originating and hang-up procedures are similar to procedures specified in ITU-T Recommendations V.25ter, T.31 and T.32. In GSM there can be voice followed by data (refer to GSM 02.02), alternating voice/data (refer to GSM 02.02) and alternating voice/fax calls (refer to GSM 02.03).

Test command returns values supported by the TA as a compound value.

Note! +CMOD is set to zero after a successfully completed alternating mode

call. It is set to zero also after a failed answering. The power-up, factory (&F) and user resets (Z), also set the value to zero. This reduces the possibility that alternating mode calls are originated or answered accidentally.

<mode> Description

0 Single mode. Default value.

In order to avoid accidental originating or answering of alternating calls is <mode> set to single mode in following cases:

- after a successfully completed alternating mode call;

- after a unsuccessful answering;

- after successfully execution of the commands &F and Z

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2. CALL CONTROL

2.11 AT+CVHU Voice Hang-Up

Description Command Possible Responses

Set Command +CVHU=[<mode>] • +CME ERROR: <err>

Read command +CVHU? • +CVHU: <mode>

•OK

• +CME ERROR: <err>

Test if the command is supported

+CVHU=? +CVHU: (list of

Selects whether ATH or “drop DTR” causes a voice connection to be disconnected or not. Voice connection also includes alternating mode calls that are currently in voice mode.

Note! When <mode>=2, this command must be viewed in conjunction with

the V.25ter command &D, or &D will be ignored.

<mode> Description

0 “Drop DTR” ignored but OK response given. ATH

1 “Drop DTR” and ATH ignored but OK response given

2 “Drop DTR” behavior according to &D setting. ATH

disconnects

disconnects. Default value

2.12 AT+VTS DTMF and Tone Generation

Description Command Possible Responses

supported <mode>s)

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Request transmission of DTMF tone(s)

Show if the command is supported

AT+VTS=<DTMF> OK

ERROR

AT+VTS=? OK

ERROR

This command allows the transmission of DTMF tones. These tones may be used, for example, when announcing the start of a recording period. The command is write only. In this profile of commands, the command does not operate in data or fax modes of operation (+FCLASS=0,1,2-7).

Note! The ATD-command is used only for dialing. It is not possible to

generate arbitrary DTMF tones using the ATD command.

GM28 INTEGRATOR’S MANUAL

Note! The AT+VTS command is used only during a voice call.

<DTMF> Description

ASCII character string

An ASCII character string with entries in the set 0-9, #, *, AD separated by commas. Each entry is interpreted as a single ASCII character. Example: The string “8,9” sends two DTMF tones, “8” followed by “9”

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3. Control and Status

3.1 ATQ Result Code Suppression

Description Command Possible Responses

Set Result Code Suppression

Read the current setting

Show if the command is supported

ATQ[=]<value> •OK

ATQ? Q: <value>

ATQ=? Q: (list of supported

Determines whether or not the DCE transmits result codes to the DTE. When result codes are being suppressed, no portion of any intermediate, final, or unsolicited result code - header, result text, line terminator, or trailer - is transmitted.

<value> Description

0 DCE transmits result codes. Default value

1 Result codes are suppressed and not transmitted

3.2 ATS0 Automatic Answer Control

Description Command Possible Responses

Automatic answer control

ATS0=[<rcnt>] •OK

•ERROR

<value>s)

•ERROR

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Read the current setting

Show if the command is supported

ATS0? <rcnt>

ATS0=? S0: (list of supported

<rcnt>s)

Defines the automatic answering feature of the modem. A non-zero value specifies the number of rings before the call is answered.

Note! Call is always answered in the current fax class, regardless of whether

the incoming call is voice, data, or fax.

<rcnt> Description

0 Disable automatic answer. Default value

1-7 Answer after the specified number of rings

GM28 INTEGRATOR’S MANUAL

3.3 ATS2 Escape Sequence Character

Description Command Possible Responses

Set escape sequence character

Read the current setting

Show if the command is supported

ATS2=[<esc>] •OK

•ERROR

ATS2 <esc>

ATS2=? S2: (list of supported

<esc>s)

Defines the character to be used as the escape sequence character when switching from on-line data mode to on-line command mode. The response to the command is modified to reflect the change.

<esc> Description

43 Escape sequence character. Default value

0 to 255 Escape sequence character

Note! If the <esc> parameter is set to a value in the range of 128-255, the

escape sequence detection is disabled.

3.4 ATS3 Command Line Termination Character

Description Command Possible Responses

Set Command Line Termination Character

Read the current setting

Show if the command is supported

ATS3=<value> •OK

•ERROR

ATS3? <value>

ATS3=? S3: (list of supported

<value>s)

This S-parameter represents the decimal IA5 value of the character recognised by the DCE from the DTE to terminate an incoming command line. It is also generated by the DCE as part of the header, trailer, and terminator for result codes and information text, along with the S4 parameter.

The previous value of S3 is used to determine the command line termination character for entry of the command line containing the S3 setting command. However, the result code issued uses the value of S3 as set during the processing of the command line. For example, if S3 was previously set to 13 and the command line “ATS3=30” is issued,

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3. CONTROL AND STATUS

the command line is terminated with a <CR> character (IA5 0/13), but the result code issued uses the character with the ordinal value 30 (IA5 2/14) in place of the <CR>.

<value> Description

13 Command line termination character, Default value

0 to 127 Command line termination character

3.5 ATS4 Response Formatting Character

Description Command Possible Responses

Set Response Formatting Character

Read the current setting

Show if the command is supported

ATS4=<value> •OK

•ERROR

ATS4? <value>

ATS4=? S4: (list of supported

<value>s)

This S-parameter represents the decimal IA5 value of the character generated by the DCE as part of the header, trailer, and terminator for result codes and information text, along with the S3 parameter (see the description of the V parameter for usage).

If the value of S4 is changed in a command line, the result code issued in response to that command line will use the new value of S4.

<value> Description

10 Formatting character. Default value

0 to 127 Formatting character

Note: ASCII character 10 is equivalent to <LF>

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GM28 INTEGRATOR’S MANUAL

3.6 ATS5 Command Line Editing Character (BACKSPACE)

Description Command Possible Responses

Request Command Line Editing Character

Shows the current setting

Show if the command is supported

ATS5=<value> •OK

ATS5? <value>

ATS5=? S5: (list of supported

This S-parameter represents the decimal IA5 value of the character recognised by the DCE as a request to delete from the command line the immediately preceding character.

<value> Description

8 Line editing character. Default value

0 to 127 Line editing character

3.7 ATS6 Blind Dial Delay Control

Description Command Possible Responses

Blind dial delay control ATS6=[<dly>] OK

Read the current setting

ATS6? <dly>

•ERROR

<value>s)

Show if the command is supported

ATS6=? S6: (list of supported

<dly>s)

Included for compatibility. No functionality

<dly> Description

2 Wait two seconds before blind dialling. Default value

2-255 Number of seconds to wait before blind dialling

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3. CONTROL AND STATUS

3.8 ATS7 Connection Completion Timeout

Description Command Possible Responses

Set connection completion timeout

Read the current setting

Show if the command is supported

ATS7=[<tmo>] •OK

•ERROR

ATS7? <tmo>

ATS7=? S7: (list of supported

<tmo>s)

Defines the maximum time allowed between completion of dialling and the connection being established. If this time is exceeded then the connection is aborted.

<tmo> Description

50 Timeout value in seconds. Default value

1-255 Timeout value in seconds

3.9 ATS8 Comma Dial Modifier Delay Control

Description Command Possible Responses

Set Comma Dial Modifier Delay Control

ATS8=[<dly>] •OK

•ERROR

Read the current setting.

Show if the command is supported.

ATS8? <dly>

ATS8=? S8: (list of supported

<dly>s)

Included for compatibility. No functionality

<dly> Description

2 The value of the dial modifier delay in seconds. Default value

1-255 The value of the dial modifier delay in seconds

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GM28 INTEGRATOR’S MANUAL

3.10 ATS10 Automatic Disconnect Delay Control

Description Command Possible Responses

Set Automatic Disconnect Delay Control

Read the current setting

Show if the command is supported

ATS10=[<val>] •OK

ATS10? <val>

ATS10=? S10: (list of supported

Included for compatibility. No functionality

<val> Description

2 Remains connected for two tenths of a second. Default value

1-254 Number of tenths of a second of delay

3.11 AT*ECAM Ericsson Call Monitoring

Description Command Possible Responses

Set Call Monitoring on or off

AT*ECAM=<onoff> •OK

•ERROR

<val>s)

• +CME ERROR: <err>

•OK

•ERROR

Re ad the cu rrent st atus for Call Monitoring

Test if the command is supported

AT*ECAM? • *ECAM: <onoff>

• +CME ERROR: <err>

•OK

•ERROR

AT*ECAM=? • *ECAM: list of

supported <onoff>s

• +CME ERROR: <err>

•OK

•ERROR

This command activates or deactivates the call monitoring function in the ME. When this log function is activated in the ME, the ME informs about call events, such as incoming call, connected, hang up etc.

It is preferable that the current status shall always be sent with result code *ECAV when activating the log function. The purpose of this is two fold:

• to gather relevant information for the call log in a TE;

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3. CONTROL AND STATUS

• to make it possible for the TE to display call state information for an ongoing call.

<onoff> Description

0 The call log function is disabled (off). Default value

1 The call log function is enabled (on)

Examples

AT*ECAM? *ECAM: 0

AT*ECAM=1 OK

3.12 AT*EDST Ericsson Daylight Saving Time

Description Command Possible Responses

Set Daylight Saving Time

Read current Daylight Saving Time

Show if the command is supported

AT*EDST=<dst> • +CME ERROR: <err>

•OK

•ERROR

AT*EDST? • *EDST: <dst>

• +CME ERROR: <err>

•OK

•ERROR

AT*EDST=? • *EDST: (list of

supported <dst>s)

• +CME ERROR: <err>

•OK

•ERROR

This command sets the daylight saving time hours.

Note! This command affects the MS clock set with the AT+CCLK command.

To avoid confusion it is recommended the daylight saving time (DST) is set with this command before setting the actual local time with AT+CCLK.

<dst> Description

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0 Standard time

1 Daylight saving time, +1 hour

2 Daylight saving time, +2 hours

GM28 INTEGRATOR’S MANUAL

3.13 AT*EMAR Ericsson Master Reset

Description Command Possible Responses

Perform a master reset in the MS

Shows if the command is supported or not

This command requests the MS to reset user data. The user data in the MS will be reset to the default values. This command also unlocks the MS.

<phone lock code> Description

String Security code (phone lock code) must be verified

3.14 AT*EPEE Ericsson Pin Event

Description Command Possible Responses

Requests the MS to inform when the PIN code has been inserted

AT*EMAR=<phone lock code>

AT*EMAR=? • +CME ERROR: <err>

before performing the master reset, see also AT+CLCK

AT*EPEE=<onoff> • +CME ERROR: <err>

• +CME ERROR: <err>

•OK

•ERROR

•OK

•ERROR

•OK

•ERROR

Test if the command is supported

Re ad the cu rrent st atus for PIN Code Request

AT*EPEE=? • *EPEE: (list of

supported <onoff>s)

• +CME ERROR: <err>

•OK

•ERROR

AT*EPEE? • *EPEE: <onoff>

• +CME ERROR: <err>

•OK

•ERROR

The command requests the MS to report when the PIN code has been inserted and accepted.

<onoff> Description

0 Request for report on inserted PIN code is not activated

1 Request for report on inserted PIN code is activated (on)

(off). Default value

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3. CONTROL AND STATUS

3.15 AT+CCLK Set Clock and Date

Description Command Possible Responses

Set the real time clock of the ME

Show the current setting

Show if the command is supported

AT+CCLK=<time> • +CME ERROR: <err>

•OK

•ERROR

AT+CCLK? • +CCLK: <time>

• +CME ERROR: <err>

•OK

•ERROR

AT+CCLK=? •OK

•ERROR

Sets the real time clock of the ME. If setting fails in an ME, error +CME ERROR: <err> is returned. Read command returns the current setting of the clock.

<time> Description

string type value

Format is “yy/mm/dd,hh:mm:ss±zz”, where characters indicate year (two last digits), month, day, hour, minutes, seconds and time zone (indicates the difference, expressed in quarters of an hour, between the local time and GMT; range -47...+48), e.g. 6th of May 1994, 22:10:00 GMT+2 hours reads “94/05/06,22:10:00+08”

NOTE: If the ME does not support time zone information then the three last characters of <time> are not returned by +CCLK?

3.16 AT+CEER Extended Error Report

Description Command Possible Responses

Request an Extended Error Report

Show if the command is supported

Causes the TA to return one or more lines of information text <report>. Typically, the text will consist of a single line containing the failure information given by the GSM network in text format.

<report> Description

characters The total number of characters, including line terminators,

in the information text shall not exceed 2041 characters. Text shall not contain the sequence 0<CR> or OK<CR>

AT+CEER • +CEER: <report>

AT+CEER=? • OK

•OK

•ERROR

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GM28 INTEGRATOR’S MANUAL

3.17 AT+CFUN Set Phone Functionality

Description Command Possible Responses

Set MS functionality AT+CFUN=<fun> • +CME ERROR: <err>

•OK

Show the current setting

Show if the command is supported

AT+CFUN? • +CFUN: <fun>

• +CME ERROR: <err>

AT+CFUN=? • +CFUN: (list of

supported <fun>s)

• +CME ERROR: <err>

Selects the level of functionality <fun> in the MS.

"Full functionality" results in the highest level of power usage. It is possible to activate all parts of the modem. Default ON state.

"Minimum functionality" results in minimum power usage. The modem is in a powered OFF state. No functionality can be executed until the modem is powered back ON.

Transitions between states are defined below.

Initial State New State Function

<fun> = 0 - Modem is off. No functionality

<fun> = 1 <fun> = 0 Modem was fully active. Active calls are hung

up and an IMSI detach is sent. The modem then powers off

<fun> Description

0 Minimum functionality. Modem is OFF

1 Full functionality. Modem is ON

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3. CONTROL AND STATUS

3.18 AT+CIND Indicator Control

Description Command Possible Responses

Set Indicator Control

Read the current setting

Test if the command is supported

AT+CIND=[<ind> [,<ind>[,…]]]

AT+CIND? • +CIND: <ind>,<ind>,…

AT+CIND=? • +CIND: (<descr>,(list of

• +CME ERROR: <err>

•OK

•ERROR

• +CME ERROR: <err>

•OK

•ERROR

supported <ind>s)), (<descr>,(list of supported <ind>s)),…

• +CME ERROR: <err>

•OK

•ERROR

Used to set the values of ME indicators. <ind> value 0 means that the indicator is off (or in state which can be identified as “off” state), 1 means that indicator is on (or in a state which is more substantial than “off” state), 2 is more substantial than 1, and so on. If the indicator is a simple on/off style element, it has values 0 and 1. The number of elements is ME specific. If the ME does not allow setting of indicators or it is not currently reachable, +CME ERROR: <err> is returned. If a certain indicator is not writable, it cannot be set. If the parameter is an empty field, the indicator will keep the previous value.

Test command returns pairs, where string value <descr> is a maximum 16 character description of the indicator and compound value is the allowed values for the indicator. If ME is not currently reachable, +CME ERROR: <err> is returned (refer to GSM 07.07).

<ind> Description

Integer type Value shall be in range of corresponding <descr>

<descr> Description

“signal” Signal quality (0-5)

“service” Service availability (0-1)

“sounder” Sounder activity (0-1)

“message” Message received (0-1)

“call” Call in progress (0-1)

“roam” Roaming indicator (0-1)

“sms full” A short message memory storage in the MT has become full

(1), or memory locations are available (0); i.e. the range is (0-1)

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GM28 INTEGRATOR’S MANUAL

3.19 AT+CLAC List all available AT Commands

Command Possible Responses

+CLAC <AT Command1> [<CR> <LF> <AT Command2>[…]]

+CLAC=? +CME ERROR: <err>

+CME ERROR: <err>

Causes the ME to return one or more lines of AT commands. This command has the same functionality as AT*.

Note! This command only returns the AT commands that are available to the

user.

3.20 AT+CMEE Mobile Equipment Error

Description Command Possible Responses

Request GSM Mobile Equipment Error Control

Read the command AT+CMEE? • +CMEE: <n>

Show if the command is supported

AT+CMEE=[<n>] •OK

AT+CMEE=? • +CMEE: (list of

•ERROR

•OK

•ERROR

supported <n>s)

•OK

•ERROR

Disables or enables the use of result code +CME ERROR: <err> as an indication of an error relating to the functionality of the ME. When enabled, ME related errors cause +CME ERROR: <err> final result code instead of the regular ERROR final result code. ERROR is returned normally when error is related to syntax, invalid parameters, or TA functionality. For more information, refer to “+CME ERROR (Mobile Equipment Error Code)”, page 55.

<n> Description

0 Disable +CME ERROR: <err> result code and use ERROR

1 Enable +CME ERROR: <err> result code and use numeric

2 Enable +CME ERROR: <err> result code and use verbose

instead. Default value

<err> values (see page 55)

LZT 123 7468 P1A

3. CONTROL AND STATUS

3.21 AT+CMER Mobile Equipment Event Reporting

Description Command Possible Responses

Set phone activity status

Read the current setting

Test if the command is supported

AT+CMER=[<mode> [,<ind>[,<bfr>]]]

AT+CMER? • +CMER: <mode>,<ind>,<bfr>

AT+CMER=? • +CMER: (list of supported

• +CME ERROR: <err>

•OK

•ERROR

•OK

•ERROR

<mode>s), (list of supported <ind>s), (list of supported <bfr>s)

•OK

•ERROR

Enables or disables the sending of unsolicited result codes from ME to TE in the case of key pressings, display changes, and indicator state changes. <mode> controls the processing of unsolicited result codes specified within this command. <bfr> controls the effect on buffered codes when <mode> 1, 2 or 3 is entered. If the ME does not support setting, +CME ERROR: <err> is returned.

<mode> Description

0 Buffer unsolicited result codes in the TA; if TA result code

buffer is full, codes can be buffered in some other place or the oldest ones can be discarded

3 Forward unsolicited result codes directly to the TE; TA-TE

<ind> Description

0 No indicator event reporting

1 Indicator event reporting using result code +CIEV:

<bfr> Description

0 TA buffer of unsolicited result codes defined within this

link specific inband technique used to embed result codes and data when TA is in on-line data mode

<ind>,<value>. <ind> indicates the indicator order number (as specified for +CIND) and <value> is the new value of indicator. Only those indicator events, which are not caused by +CIND shall be indicated by the TA to the TE

command is cleared when <mode> 1...3 is entered

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GM28 INTEGRATOR’S MANUAL

3.22 AT+CPAS Phone Activity Status

Description Command Possible Responses

Execute Phone Activity Status

Test if the command is supported

AT+CPAS[=<mode>] •+CPAS: <pas>

•+CME ERROR <err>

•OK

•ERROR

AT+CPAS=? • +CPAS:

(list of supported <pas>s)

•+CME ERROR <err>

•OK

•ERROR

Returns the activity status <pas> of the ME. It can be used to interrogate the ME before requesting action from the phone.

When the command is executed without the <mode> argument, the command returns <pas>-values from 0 to 128 (for supported values se table 1 below). When, on the other hand, the command is executed with the <mode> argument set to 1, the command may return Ericsson specific <pas> values from 129 to 255 (for supported values see the table below).

Test command returns values supported by the ME as a compound value: refer to GSM 07.07.

<pas> Description

0 Ready (ME allows commands from TA/TE)

3 Ringing (ME is ready for commands from TA/TE, but the

4 Call in progress (ME is ready for commands from TA/TE, but

129 In idle state, (operator name/clock/date). This state is a

130 Mobile oriented call in progress. This is a sub-state to ‘call

131 Mobile terminated call in progress. This is a sub-state to

<mode> Description

1 Allows the CPAS to return Ericsson specific <pas> values,

ringer is active)

a call is in progress)

sub-state to ‘ready’ (0) and has the following definition: In Idle state, that is, operator, clock and date (is set) shown on the display No conversation or data call in progress No sub-menus shown on the display 4 Only digits, clear, *, NO and # allowed in this mode, not changing mode

in progress’

‘call in progress’

such as 129, 130 and 131

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3. CONTROL AND STATUS

3.23 AT+CPIN PIN Control

Description Command Possible Responses

Request PIN Control AT+CPIN=<pin>[,<new

Show the current setting

Show if the command is supported

pin>]

AT+CPIN? • +CPIN: <code>

AT+CPIN=? • +CME ERROR:

• +CME ERROR: <err>

•OK

•ERROR

• +CME ERROR: <err>

•OK

•ERROR

<err>

•+CPIN: (supported <code>s)

•OK

•ERROR

Sends the password to the ME, which is necessary to make the ME operational (SIM PIN, SIM PUK or PH-SIM). If the PIN is to be entered twice, the TA autonomously repeats the PIN. If no PIN request is pending, no action is taken towards the ME and an error message (+CME ERROR <err>) is returned to the TE.

If the PIN required is PUK, the second pin is required. This second PIN, <newpin>, is used to replace the old PIN in the SIM.

Note! Commands which interact with the ME that are accepted when the ME

has a pending request for SIM PIN, SIM PUK or PH-SIM are: +CGMI, +CGMM, +CGMR, +CGSN, +CFUN, +CMEE +CPIN, L and M.

<pin>,<newpin> Description

string The range for the SIM PIN and the PH- SIM PIN is 4 - 8

<code> Description

READY ME is not pending for any password

SIM PIN ME is waiting SIM PIN to be given

SIM PUK ME is waiting SIM PUK to be given

digits. The SIM PUK consists of 8 digits

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<code> Description

PH-SIM PIN ME is waiting PHone-to-SIM card password to be given

SIM PIN2 ME is waiting SIM PIN2 to be given. This <code> is

recommended to be returned only when the last executed command resulted in PIN2 authentication failure (i.e. +CME ERROR: 17); if PIN2 is not entered correctly after the failure, it is recommended that ME does not block its operation

SIM PUK2 ME is waiting SIM PUK2 to be given. This <code> is

recommended to be returned only when the last executed command resulted in PUK2 authentication failure (i.e. +CME ERROR:18); if PUK2 and new PIN2 are not entered correctly after the failure, it is recommended that ME does not block its operation.

BLOCKED The SIM cards is blocked for the user

<err> Description

0 Phone failure

5 PH-SIM PIN required

10 SIM not inserted

11 SIM PIN required

12 SIM PUK required

13 SIM failure

14 SIM busy

15 SIM wrong

16 Incorrect password

24 Text string too long

25 Invalid characters in text string

100 Unknown

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3. CONTROL AND STATUS

3.24 AT+CPWD Change Password

Description Command Possible Responses

Request facility lock AT+CPWD=<fac>,

Show if the command is supported

AT+CPWD=? • +CPWD:

•+CME ERROR <err>

•OK

•ERROR

(<fac1>,<pwdlength1>), (<fac2>,<pwdlength2>), …

•+CME ERROR <err>

•OK

•ERROR

Sets a new password for the facility lock function defined by command Facility Lock +CLCK.

Test command returns a list of pairs which present the available facilities and the maximum length of their password.

<fac> Description

“PS” PH-SIM (lock PHone to SIM card) (ME asks password when

“SC” SIM (lock SIM card) (SIM asks password in ME power-up

“P2” SIM PIN2

other than current SIM card inserted)

and when this lock command issued)

“AO” BAOC (Barr All Outgoing Calls) (refer GSM 02.88 clause 1)

“OI” BOIC (Barr Outgoing International Calls) (refer GSM 02.88

“AI” BAIC (Barr All Incoming Calls) (refer GSM 02.88 clause 2)

“IR” BIC-Roam (Bar Incoming Calls when Roaming outside the

“OX” BOIC-exHC (Barr Outgoing International Calls except to

“AB” All Barring services (refer GSM 02.30)

“AG” All outGoing barring services (refer GSM 02.30)

“AC” All inComing barring services (refer GSM 02.30)

<oldpwd> Description

string type <oldpwd> shall be the same as password specified for the

<newpwd> Description

string type <newpwd> is the new password, maximum length of

clause 1)

home country) (refer GSM 02.88 clause 2)

Home Country) (refer GSM 02.88 clause 1)

facility from the ME user interface or with the change password command, +CPWD

password can be determined with <pwdlength>

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GM28 INTEGRATOR’S MANUAL

<pwdlength> Description

Integer type Maximum length of the password for the facility

<err> Description

0 Phone failure

3 Operation not allowed

5 PH-SIM PIN required

10 SIM not inserted

11 SIM PIN required

12 SIM PUK required

13 SIM failure

14 SIM busy

15 SIM wrong

16 Incorrect password

17 SIM PIN2 required

18 SIM PUK2 required

23 Text string too long

24 Invalid characters in text string

100 Unknown

101..255 Reserved by ETS

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3. CONTROL AND STATUS

3.25 AT+CR Service Reporting Control

Description Command Possible Responses

Set Service Reporting Control

Read current setting AT+CR? • +CR: <mode>

Test if the command is supported

AT+CR=<mode> •OK

•ERROR

•OK

•ERROR

AT+CR=? • +CR: (list of

supported <mode>s)

•OK

•ERROR

Enables or disables display of intermediate bearer capability reports during the handshake phase.

<mode> Description

0 Disable reporting. Default value

1 Enable reporting

Intermediate Result Codes:

+CR: <serv>

3.26 AT+CRC Cellular Result Code

Description Command Possible Responses

Set Cellular Result Code option

Show the current setting

Show if the command is supported

Command controls whether or not;

• the extended format of incoming call indication;

• or GPRS network request for PDP context activation;

• or notification for VBS/VGCS calls is used.

When enabled, an incoming call is indicated to the TE with unsolicited result code +CRING: <type> instead of the normal RING.

AT+CRC=[<mode>] •OK

AT+CRC? • +CRC: <mode>

AT+CRC=? • +CRC: (list of

•ERROR

•OK

•ERROR

supported <mode>s)

•OK

•ERROR

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Test command returns values supported by the TA as a compound value.

<mode> Description

0 Disables extended format

1 Enables extended format

Unsolicited Result Codes:

+CRING: <type>

3.27 AT+CSAS Save Settings

Description Command Possible Responses

Save Settings AT+CSAS[=<profile>] • +CMS ERROR: <err>

•OK

•ERROR

Get available profiles

AT+CSAS=? • +CSAS: (list of supported

<profile>s)

• +CMS ERROR: <err>

•OK

•ERROR

Saves active message service settings to a non-volatile memory. A TA can contain several settings profiles. Settings specified in commands Service Centre Address +CSCA, Set Message Parameters +CSMP and Select Cell Broadcast Message Types +CSCB (if implemented) are saved. Certain settings may not be supported by the storage (e.g. SIM SMS parameters) and therefore can not be saved.

Test command shall display the supported profile numbers for reading and writing of settings.

<profile> Description

0..255 Manufacturer specific profile number where settings are to be stored. Default value is 0

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3. CONTROL AND STATUS

3.28 AT+CSQ Signal Strength

Description Command Possible Responses

Execute Signal Strength

Test if the command is supported

AT+CSQ • +CSQ: <rssi>,<ber>

• +CME ERROR <err>

•OK

•ERROR

AT+CSQ=? • +CSQ: (list of

supported <rssi>s),(list of supported <ber>s)

• +CME ERROR <err>

•OK

•ERROR

Returns the received signal strength indication <rssi> and channel bit error rate <ber> from the ME. Test command returns values supported by the TA as compound values.

<rssi> Description

0 –113dBm or less

1 –111dBm

2..30 –109… –53dBm

31 –51dBm or greater

99 Not known or not detectable

<ber> Description

0..7 As RXQUAL values in the table in GSM 05.08 subclause

99 Not known or not detectable

8.2.4

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3.29 AT+CTZU Automatic Time Zone Update

Description Command Possible Responses

Enable and disable automatic time zone update via NITZ

Read current setting AT+CTZU? • +CTZU: <onoff>

Show if the command is supported

AT+CTZU=<onoff> • +CME ERROR: <err>

•OK

•ERROR

• +CME ERROR: <err>

•OK

•ERROR

AT+CTZU=? • +CTZU: (list of

supported <onoff>s)

• +CME ERROR: <err>

•OK

•ERROR

Enables and disables the automatic time zone update via NITZ. If setting fails in an ME error, +CME ERROR <err> is returned.

<onoff> Description

0 The automatic time zone update is disabled (off). Default

1 The automatic time zone update is enabled (on)

value

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4. Audio

AT*E2EAMS and AT*E2APR are new commands that replace the funtionality offered by the *EALR, *EAMS, *EARS and *ELAM commands. Use the new commands in new applications. The old commands are included for compatibility.

4.1 AT*E2EAMS Ericsson M2M Audio Profile Modification

Description Command Possible Responses

Request operation with audio profile

Display set profile

Show if the command is supported

AT*E2EAMS= <op>[,<TxPGA>, <RxPGA>,<SideToneGain>, <AuxInGain>,<MicInGain>, <TxAGC>,<Volume>, <MaxVolume>,<MicPath>, <SpkPath>,<TxPCM>, <RxPCM>,<HFAlgorithm>, <LocalAudio>,<TxGainLow>, <MicVolt2V>,<SideTone>, <NoiseRed>,<EchoCancel>, <AnalogRing>,][,<val>]]

AT*E2EAMS? • *E2EAMS: <TxPGA>,

AT*E2EAMS=? • *E2EAMS:

• ERROR

•OK

<RxPGA>, <SideToneGain>, <AuxInGain>, <MicInGain>, <TxAGC>,<Volume>, <MaxVolume>, <MicPath>,<SpkPath>, <TxPCM>,<RxPCM>, <HFAlgorithm>, <LocalAudio>, <TxGainLow>, <MicVolt2V>, <SideTone>,<NoiseRed>, <EchoCancel>, <AnalogRing> OK

• ERROR

(list of supported <op>s)

• ERROR

LZT 123 7468 P1A

This command allows the modification and configuration of the current audio profile. An audio profile is a set of data which uniquely defines the way in which the audio paths, gains, DSP algorithms and switch setting are configured. There are several audio profiles available in non-volatile storage, and the current profile can be modified by use of the AT*E2APR command.

The AT*E2EAMS command allows the user to:

GM28 INTEGRATOR’S MANUAL

• configure the whole profile, specifying each audio parameter in a comma separated list;

• set a single parameter, given by its parameter number;

• save the current profile to non-volatile memory under the current profile number (see AT*E2APR).

The current audio settings can also be displayed by running the read command AT*E2EAMS?

Default audio settings are given in AT*E2APR.

Abortability:

This command may not be aborted.

Refer to the diagram below to understand which parts of the audio circuit are affected by the various parameters.

DSPCODEC

ATM S

MICP

MICN

BEARP

BEARN

AuxInGain

MicInGain

Aux Amp

Ear Amp

MicPath

switches

SpkPath switches

TxPCM

RxPCM

TxPGA

SideTone

Gain

SideTone

RxPGA Volume

TxGainLow

switch

PCMOUT

PCMIN

PCMULD

PCMDLD

Speech

decoder

Encoder

Figure 4.1 Audio diagram of the CODEC

F/R

Handsfree

EchoCancel

NoiseRed

F/R

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4. AUDIO

<op> Description

0 Configure current profile (<pr1> to <pr21>)

1Set <TxPGA>

2 Set <RxPGA>

3Set <SideToneGain>

4 Set <AuxInGain>

5 Set <MicInGain>

6 Set <TxAGC>

7 Set <Volume>

8 Set <MaxVolume>

9Set <MicPath>

10 Set <SpkPath>

11 Set <TxPCM>

12 Set <RxPCM>

13 Set <HFAlgorithm>

14 Set <LocalAudio>

15 Set <TxGainLow>

16 Set <MicVolt2V>

17 Set <SideTone>

18 Set <NoiseRed>

19 Set <EchoCancel>

20 Set <AnalogRing>

255 Save current profile to non-volatile storage at current

profile number

<TxPGA>,

Description

<RxPGA>

0 -5dB PGA gain

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1 -2.5dB PGA gain

2 0dB PGA gain

3 2.5dB PGA gain

GM28 INTEGRATOR’S MANUAL

<SideToneGain> Description

0 10dB

113dB

2 16dB

319dB

4 22dB

525dB

<AuxInputGain> Description

Description

5dB PGA gain

7.5dB PGA gain

–7.5dB PGA gain

–10dB PGA gain

0 MUTE

113dB

2 34dB

346dB

<MicInputGain> Description

0 MUTE

113dB

2 25dB

334dB

4 46dB

<TxAGCGain> Description

0 0dB

13dB

2 6dB

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4. AUDIO

<Volume>,

Description

0 MUTE

1-9 Volume levels 1-9

<MicPath>,

Description

0 OFF

1 MUTE

2 Internal (using microphone/speaker)

3 External (using ATMS/AFMS)

<TxPCM>,

Description

<RxPCM>

0 13bit PCM

116bit PCM

<HFAlgorithm> Description

0 No handsfree

1 Advanced handsfree

2 Switching handsfree

3 No handsfree handheld

4 No handsfree external

<LocalAudio> Description

0 Local audio mode off

1 Local audio microphone/no speaker

2 Local audio no microphone/speaker

3 Local audio microphone/speaker

<TxGainLow> Description

0 Tx gain normal

1 Tx gain –7dB

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GM28 INTEGRATOR’S MANUAL

<MicVolt2V> Description

0 Microphone voltage at 2.5 V

1 Microphone voltage at 2 V

Examples

0 OFF

1ON

Description

AT*E2EAMS=? *E2EAMS=(0-21,255) OK

Current default profile is 0:

AT*E2EAMS? *E2EAMS: 2,2,3,2,3,2,5,9,3,3,0,1,0,0,0,1,1,1,1,1,1 OK

Sets current profile with these settings:

AT*E2EAMS=0,2,1,2,0,0,2,5,9,2,2,0,1,0,0,0,1,1,0,0,1,1 OK

Sets TxPGA gain to 0dB:

AT*E2EAMS=1,2 OK

Turns analog ringing off:

AT*E2EAMS=20,0 OK

Save current profile to currently loaded profile in non-volatile memory:

AT*E2EAMS=255 OK

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4. AUDIO

4.2 AT*E2APR M2M Audio Profile Manipulation

Description Command Possible Responses

Request operation with audio profile

Display currently set profile

Shows if the command is supported

AT*E2APR= <op>[,<prnum1> [,<prnum2>]]

AT*E2APR? • *E2APR: current <prnum>

AT*E2APR=? • *E2APR: (list of supported

•ERROR

•OK

• *E2APR: <TxPGA>,<RxPGA>, <SideToneGain>,<AuxInGain>, <MicInGain>,<TxAGC>, <Volume>,<MaxVolume>, <MicPath>,<SpkPath>, <TxPCM>,<RxPCM>, <HFAlgorithm>,<LocalAudio>, <TxGainLow>,<MicVolt2V>, <SideTone>,<NoiseRed>, <EchoCancel>,<AnalogRing>

•OK

• ERROR

<op>s), (list of supported <prnum1>s), (list of supported <prnum2>s)

•ERROR

This command allows the maniuplation and storage of the audio “profiles” stored in the MS. The requirement for the 2nd and 3rd parameters depend on the operation being carried out.

Using the command you can:

• Set one of the three audio profiles 0, 1 or 2 as the current profile. This will load the profile's settings from NVM and implement them.

• Read one of the audio profiles. The current settings for the profile number defined will be displayed.

• Copy all parameters from one profile into another.

• Reset any of the profiles. This will reinstate the factory defaults for the profile:

- 0 is the handset profile,

- 1 is the portable handsfree profile,

- 2 is the car kit profile.

• Set a profile as the default profile on next power up.

<op> Description

0 Set profile <prnum1> to set as current

1 Copy profile <prnum1> to <prnum2>

2 Read profile <prnum1> settings

3 Reset profile <prnum1> to factory default

4 Set default profile as <prnum1>. Will store this as defautl

profile in NVM, and use it as default from next power on

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GM28 INTEGRATOR’S MANUAL

Examples

0 Profile 0 (Factory profile set for handset). Default value

1 Profile 1 (Factory profile set for portable handsfree)

2 Profile 2 (Factory profile set for car kit)

Description

AT*E2APR=? *E2APR= (0-4),(0-2),(0-2) OK

Current default profile is profile 0:

AT*E2APR? *E2APR: 0 OK

Set audio profile now used to profile 1:

AT*E2APR=0,1 OK

Audio profile 1 settings:

AT*E2APR=1,1 *E2APR: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 OK

Copy audio profile 1 to audio profile 2:

AT*E2APR=2,1,2 OK

Reset audio profile 1 with factory default - this also resets the current audio paths to the new profile as 1 is currently used:

AT*E2APR=3,1 OK

Sets profile number 1 as the default when modem is powered on:

AT*E2APR=4,1 OK

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4. AUDIO

4.3 AT*EALR Ericsson Audio Line Request

Description Command Possible Responses

Request the audio lines (ATMS,AFMS)

Show the current setting

Show list of supported parameters

AT*EALR=<mode> [,<activation> [,<aud_status>]]

AT*EALR? *EALR:

AT*EALR=? *EALR:(list of supported

Included for compatibility. No functionality.

<mode> Description

0 No request for ATMS or AFMS

1 Request ATMS and not AFMS

2 Request AFMS and not ATMS

3 Request ATMS and AFMS

<activation> Description

• *EALR: <mode>, <activation>,<resp>

•OK

•ERROR

<mode>s, <activation>s and <aud_status>s parameters)

0 Not direct activated audio accessory (e.g. cordless

1 Direct activated audio accessory (e.g. vehicle hands

<aud_status> Description

0 No change of the audio status

1 Audio hand over. Accessory hands over control of both

2 Audio demand. Accessory demands control of both the

<resp> Description

0 Disable ATMS and AFMS

1 Enable ATMS and disable AFMS

2 Disable ATMS and enable AFMS

3 Enable ATMS and AFMS

portable hands free)

free)

the audio lines and the call to the phone

audio lines and the call

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GM28 INTEGRATOR’S MANUAL

4.4 AT*EAMS Ericsson Audio Mode Selection

Description Command Possible Responses

Sets the audio mode for the application

Show the current audio mode setting

Show list of supported services

AT*EAMS=<internal_voice_al g>[,<noise_reduction> [,<side tone> [,<short_echo_canceling> [,<ATMS_gain> [,<class> [,<ATMS_sensitivity_deviation _from_class> [,<AFMS_sensitivity_deviation _from_class>]]]]]]]

AT*EAMS? *EAMS:<internal_voice_alg

AT*EAMS=? *EAMS: (list of supported

•OK

•ERROR

>, <noise_reduction>, <side_tone>, <short_echo_canceling>, <AFMS_gain>,<class>,<AT MS_sensitivity_deviation_fr om_class>,<AFMS_sensitivi ty_deviation_from_class>

<internal_voice_alg >s, <noise_reduction>s, <side_tone>s, <short_echo_canceling>s, <AFMS_gain>s>, <class>s, <ATMS_sensitivity_deviatio n_from_class>s, <AFMS_sensitivity_deviatio n_from_class>s)

Included for compatibility. No functionality.

<internal_voice_alg> Description

0 None

1 Semi Duplex

2 Full Duplex

<noise_reduction> Description

0 Off

1On

<side_tone> Description

0 Off

1On

(Note! the internal hands free algorithm in the MS contains echo cancelling)

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4. AUDIO

<short_echo_canceling> Description

0 Off

1On

<ATMS_gain> Description

0 Normal (0dB) (internal voice processing)

<Class> Description

0 None

1 Low end, class reference Hector

2 Mid End, class reference Scott

3 High End, class reference Hasse

<ATMS_sensitivity_deviation_from_class>, <AFMS_sensitivity_deviation_from_class>

0 0dB

12,5dB

2 –2,5dB

35,0dB

4 –5,0dB

4.5 AT*EARS Ericsson Audio Ring Signal

Description Command Possible Responses

Request analogue ring signal in the loudspeaker

Show the current mode setting

Show list of supported modes

Included for compatibility. No functionality.

AT*EARS=<mode> •OK

AT*EARS? *EARS: <mode>

AT*EARS=? *EARS: (list of

Description

•ERROR

supported <mode>s)

LZT 123 7468 P1A

<mode> Description

0 Disable analogue ring signal

1 Enable analogue ring signal

GM28 INTEGRATOR’S MANUAL

4.6 AT*ELAM Ericsson Local Audio Mode

Description Command Possible Responses

Set local audio mode AT*ELAM=<mic>

Show the current service setting

Show list of supported parameters

[,<loudspeaker>]

AT*ELAM? *ELAM:

AT*ELAM=? *ELAM: (list of

• *ELAM: <mic>, <loudspeaker>

•OK

•ERROR

supported <mic>s and <loudspeaker>s parameters)

Included for compatibility. No functionality.

<mic> Description

0 Off

1Microphone analogue

<loudspeaker> Description

0 Off

1 Loudspeaker analogue

4.7 AT*EMIC Ericsson Microphone Mode

Description Command Possible Responses

Enables/disables the phone microphone

Test if the command is supported, show supported values

Read the current settings

Included for compatibility. No functionality.

<mode> Description

0 Microphone is disabled (off)

1 Microphone is enabled (on)

AT*EMIC=<mode> • +CME ERROR: <err>

AT*EMIC=? • *EMIC: (list of

AT*EMIC? • *EMIC: <mode>

•OK

•ERROR

supported <mode>s)

• +CME ERROR: <err>

•OK

•ERROR

• +CME ERROR: <err>

•OK

•ERROR

100

LZT 123 7468 P1A

Sony 6220502-BV User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual