Standard Horizon GM29 User Manual
Integrator’s Manual
Product Photo/Illustration
GM29
The product described in this manual conforms to the Radio and Telecommunication
Terminal Equipment (R&TTE) directive 99/5/EC with requirements covering EMC
directive 89/336/EEC and Low Voltage directive 73/23/EEC. The product fulfils the
requirements according to 3GPP TS 51.010-1, EN 301 489-7 and EN60950.
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 (October 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.
All rights reserved.
© Sony Ericsson Mobile Communications International, 2002
Publication number: LZT 123 7361 R1A
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. GM29 Modem......................................................................................................... 14
2.1 Description ......................................................................................... 14
2.2 Highlights ......................................................................................... 14
2.3 GM29 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 GM29.............................................................. 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 ...............................................................40
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...........................................42
4.4 Accessories .......................................................................................... 43
5. Technical Data ........................................................................................................44
6. Declaration of Conformity.....................................................................................49
Part 3: Using AT Commands.............................................................................. 51
1. Introduction to AT Commands.............................................................................53
1.1 Overview .......................................................................................... 53
1.2 Syntax Description ....................................................................................... 53
1.2.1 Conventions .....................................................................................53
1.2.2 AT Command Syntax .......................................................................54
1.2.3 AT Response Syntax.........................................................................55
1.3 Error Codes .......................................................................................... 57
1.3.1 +CME ERROR (Mobile Equipment Error Code) ...........................57
1.3.2 +CMS ERROR (Message Service Failure Result Code).................58
1.4 Examples on How to Use the AT Commands............................................. 59
2. Call Control.............................................................................................................61
2.1 AT+CPIN PIN Control ...................................................................... 61
2.2 ATA Answer Incoming Call ..................................................... 61
2.3 ATD Dial................................................................................... 62
2.4 ATH Hang up ............................................................................ 64
2.5 ATO Return to Online Data Mode ............................................ 64
2.6 ATP Select Pulse Dialling ........................................................ 64
2.7 ATT Select Tone Dialling......................................................... 64
2.8 ATX Call Progress Monitoring Control.................................... 65
2.9 AT+CHUP Hang up Call .................................................................... 65
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2.10 AT+CMOD Call Mode ........................................................................ 66
2.11 AT+CVHU Voice Hang-Up ................................................................ 67
2.12 AT+VTS DTMF and Tone Generation ........................................... 67
3. Control and Status ................................................................................................. 69
3.1 ATQ Result Code Suppression ................................................. 69
3.2 ATS0 Automatic Answer Control.............................................. 69
3.3 ATS2 Escape Sequence Character ............................................. 70
3.4 ATS3 Command Line Termination Character ........................... 70
3.5 ATS4 Response Formatting Character....................................... 71
3.6 ATS5 Command Line Editing Character (BACKSPACE)........ 72
3.7 ATS6 Blind Dial Delay Control................................................. 72
3.8 ATS7 Connection Completion Timeout .................................... 73
3.9 ATS8 Comma Dial Modifier Delay Control.............................. 73
3.10 ATS10 Automatic Disconnect Delay Control.............................. 74
3.11 AT*ECAM Ericsson Call Monitoring................................................. 74
3.12 AT*EDST Ericsson Daylight Saving Time ....................................... 75
3.13 AT*EMAR Ericsson Master Reset...................................................... 76
3.14 AT*EPEE Ericsson Pin Event........................................................... 76
3.15 TAT+CCLK Set Clock and Date .......................................................... 77
3.16 AT+CEER Extended Error Report..................................................... 77
3.17 AT+CFUN Set Phone Functionality................................................... 78
3.18 AT+CIND Indicator Control.............................................................. 79
3.19 AT+CLAC List all available AT Commands ..................................... 80
3.20 AT+CMEE Mobile Equipment Error.................................................. 80
3.21 AT+CMER Mobile Equipment Event Reporting ................................ 81
3.22 AT+CPAS Phone Activity Status ...................................................... 82
3.23 AT+CPIN PIN Control...................................................................... 83
3.24 AT+CPWD Change Password............................................................. 85
3.25 AT+CR Service Reporting Control ............................................... 87
3.26 AT+CRC Cellular Result Code........................................................ 87
3.27 AT+CSAS Save Settings.................................................................... 88
3.28 AT+CSQ Signal Strength................................................................. 89
3.29 AT+CTZU Automatic Time Zone Update ......................................... 90
4. Audio ....................................................................................................................... 91
4.1 AT*E2EAMS Ericsson M2M Audio Profile Modification..................... 91
4.2 AT*E2APR M2M Audio Profile Manipulation................................... 97
4.3 AT*EALR Ericsson Audio Line Request .......................................... 99
4.4 AT*EAMS Ericsson Audio Mode Selection .................................... 100
4.5 AT*EARS Ericsson Audio Ring Signal........................................... 101
4.6 AT*ELAM Ericsson Local Audio Mode .......................................... 102
4.7 AT*EMIC Ericsson Microphone Mode........................................... 102
4.8 AT*EMIR Ericsson Music Mute Indication Request ...................... 103
4.9 AT*EXVC Ericsson SET External Volume Control........................ 103
5. Data - CSD/HSCSD.............................................................................................. 105
5.1 AT+CBST Select Bearer Service Type............................................ 105
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5.2 AT+CRLP Radio Link Protocol ....................................................... 107
6. Data - GPRS..........................................................................................................109
6.1 AT+CGACT PDP Context Activate or Deactivate.............................. 109
6.2 AT+CGATT GPRS Attach or Detach ................................................. 110
6.3 AT+CGDATA Enter Data State.............................................................. 111
6.4 AT+CGDCONT Define PDP Context ....................................................... 112
6.5 AT+CGEREP GPRS Event Reporting .................................................. 114
6.6 AT+CGPADDR Show PDP Address ........................................................ 115
6.7 AT+CGQMIN Quality of Service Profile (Minimum Acceptable)........ 116
6.8 AT+CGQREQ Quality of Service Profile (Requested) .......................... 118
6.9 AT+CGREG GPRS Network Registration Status ............................... 121
6.10 AT+CGSMS Select Service for MO SMS Messages .......................... 122
7. Data - HSCSD .......................................................................................................123
7.1 AT+CHSC HSCSD Current Call Parameters ................................... 123
7.2 AT+CHSD HSCSD Device Parameters............................................ 124
7.3 AT+CHSN HSCSD Non Transparent Call Configuration................ 125
7.4 AT+CHSR HSCSD Parameters Report ............................................ 126
7.5 AT+CHSU HSCSD Automatic User Initiated Upgrading ................ 127
8. Fax..........................................................................................................................129
8.1 AT*E2FAX Ericsson M2M Fax Comm. Baud Rate Modification .... 129
8.2 Low Level Fax Commands......................................................................... 130
9. Identification .........................................................................................................131
9.1 AT Attention Command ....................................................... 131
9.2 AT&F Set to Factory Defined Configuration ............................ 131
9.3 AT&W Store User Profile........................................................... 131
9.4 AT* List all Supported AT Commands.................................. 132
9.5 AT+CGMI Read MS Manufacturer Identification ........................... 132
9.6 AT+CGMM Read MS Model Identification....................................... 132
9.7 AT+CGMR Read MS Revision Identification ................................... 133
9.8 AT+CGSN Read MS Product Serial Number Identification ............ 133
9.9 ATI Identification Information .............................................. 133
9.10 AT+GCAP Request Modem Capabilities List .................................. 134
10. Interface ................................................................................................................135
10.1 AT+CPIN PIN Control .................................................................... 135
10.2 AT&C Circuit 109 (DCD) Control ............................................ 135
10.3 AT&D Circuit 108 (DTR) Response.......................................... 135
10.4 AT&S Circuit 107 (DSR) Response.......................................... 136
10.5 AT+WS46 Mode Selection............................................................... 136
10.6 ATE Command Echo.............................................................. 137
10.7 ATV DCE Response Format................................................... 137
10.8 ATZ Reset to Default Configuration ...................................... 138
10.9 AT+CMUX Switch to 07.10 Multiplex Protocol ............................... 139
10.10 AT+CRES Restore SMS Settings..................................................... 141
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10.11 AT+ICF Cable Interface Character Format.................................. 141
10.12 AT+IFC DTE-DCE Local Flow Control...................................... 142
10.13 AT+ILRR Cable Interface Local Rate Reporting ........................... 143
10.14 AT+IPR Cable Interface Port Command ..................................... 143
10.15 AT*E2ESC M2M Escape Sequence Guard Time ............................. 144
11. Network................................................................................................................. 145
11.1 AT*E2CD Ericsson M2M Cell Description .................................... 145
11.2 AT*E2EMM Ericsson M2M Engineering Monitoring Mode ............. 147
11.3 AT*E2SPN M2M Service Provider Indication ................................. 153
11.4 AT*EALS Ericsson Request ALS Status ........................................ 153
11.5 AT*ECSP Ericsson Customer Service Profile ................................ 154
11.6 AT*EPNR Ericsson Read SIM Preferred Network ......................... 155
11.7 AT*EPNW Ericsson Write SIM Preferred Network ........................ 156
11.8 AT*E2SSN Ericsson M2M SIM Serial Number............................... 156
11.9 AT*ESLN Ericsson Set Line Name................................................. 157
11.10 AT+CIMI Subscriber Identification................................................ 158
11.11 AT+CLCK Facility Lock .................................................................. 158
11.12 AT+CNUM Subscriber Number ........................................................ 160
11.13 AT+COLP Connected Line Identification Presentation................... 161
11.14 AT+COPS Operator Selection ......................................................... 163
11.15 AT+CREG Network Registration..................................................... 164
11.16 AT*ECPI Ciphering Indicator........................................................ 165
11.17 AT*E2NBTS Ericsson M2M Neighbour BTS ..................................... 167
12. Phonebook ............................................................................................................ 169
12.1 AT*E2PBCS Ericsson M2M Phonebook Check Sum......................... 169
12.2 AT*ESAG Ericsson Add to Group .................................................. 169
12.3 AT*ESCG Ericsson Create Group ................................................... 170
12.4 AT*ESCN Ericsson Set Credit Card Number.................................. 171
12.5 AT*ESDG Ericsson Delete Group................................................... 173
12.6 AT*ESDI Ericsson Delete Group Item........................................... 173
12.7 AT*ESGR Ericsson Group Read ..................................................... 174
12.8 AT*EGIR Ericsson Group Item Read............................................. 174
12.9 AT*ESNU Ericsson Settings Number.............................................. 175
12.10 AT+CPBF Phonebook Find............................................................. 176
12.11 AT+CPBR Phonebook Read ............................................................ 176
12.12 AT+CPBS Phone Storage ................................................................ 178
12.13 AT+CPBW Phonebook Write ........................................................... 179
13. Short Message Services - Point to Point............................................................. 181
13.1 AT+CPIN PIN Control.................................................................... 181
13.2 AT+CGSMS Select Service for MO SMS Messages.......................... 181
13.3 AT+CPMS Preferred Message Storage ............................................ 181
13.4 AT+CSCA Service Centre Address.................................................. 183
13.5 AT+CMGF Message Format ............................................................. 184
13.6 AT+CMGW Write Message to Memory ............................................ 184
13.7 AT+CMGS Send Message ................................................................ 187
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GM29 INTEGRATOR’S MANUAL
13.8 AT+CMSS Send From Storage......................................................... 190
13.9 AT+CMGC Send Command .............................................................. 191
13.10 AT+CNMI New Message Indications to TE .................................... 194
13.11 AT+CMGR Read Message................................................................. 198
13.12 AT+CMGL List Message................................................................... 203
13.13 AT+CMGD Delete Message .............................................................. 209
13.14 AT+CSDH Show Text Mode Parameters ......................................... 209
13.15 AT+CSMP Set Text Mode Parameters ............................................. 210
13.16 AT+CSCS Select Character Set ....................................................... 211
13.17 AT+CSMS Select Message Service .................................................. 212
14. Short Message Services - Cell Broadcast............................................................215
14.1 AT+CNMI New Message Indications to TE .................................... 215
14.2 AT+CSCB Select Cell Broadcast Message Type ............................. 215
15. SIM Application Toolkit ......................................................................................217
15.1 AT+CPIN PIN Control .................................................................... 217
15.2 AT*E2STKS SIM Application Toolkit Settings .................................. 217
15.3 AT*E2STKD M2M STK Display Text ................................................ 218
15.4 AT*E2STKG M2M STK Get Inkey ..................................................... 219
15.5 AT*E2STKI M2M STK Get Input ...................................................... 221
15.6 AT*E2STKL M2M STK Select Item................................................... 224
15.7 AT*E2STKM M2M STK Set Up Menu................................................ 226
15.8 AT*E2STKN M2M STK Envelope (Menu Selection) ......................... 228
15.9 AT*E2STKC M2M STK Set Up Call .................................................. 228
15.10 *E2STKE STK Send Short Message............................................... 230
15.11 *E2STKP STK Send SS.................................................................. 231
15.12 *E2STKU STK Send USSD............................................................ 232
15.13 *E2STKR STK Refresh ................................................................... 233
15.14 AT*E2STKTO SIM Application Toolkit Settings .................................. 233
16. Supplementary Services .......................................................................................235
16.1 AT+CPIN PIN Control .................................................................... 235
16.2 AT+CACM Accumulated Call Meter ................................................ 235
16.3 AT+CAMM Accumulated Call Meter Maximum............................... 236
16.4 AT+CAOC Advice of Charge ........................................................... 237
16.5 AT+CPUC Price Per Unit and Currency Table ................................ 238
16.6 AT*EDIF Ericsson Divert Function................................................ 239
16.7 AT*EIPS Identity Presentation Set ................................................ 240
16.8 AT*ELIN Ericsson Line Set............................................................ 241
16.9 AT*E2SSD M2M Supplementary Service Dispatch ......................... 241
16.10 AT*E2SSI M2M Supplementary Service Indications...................... 242
16.11 AT+CCFC Call Forwarding number and Conditions....................... 247
16.12 AT+CCWA Call Waiting ................................................................... 249
16.13 AT+CHLD Call Hold and Multiparty ............................................... 251
16.14 AT+CLIP Call Line Identification Presentation ............................. 252
16.15 AT+CLIR Calling Line Identification Restriction........................... 253
16.16 AT+CSSN Supplementary Service Notification .............................. 255
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16.17 AT+CUSD Unstructured Supplementary Service Data.................... 257
17. Alphabetical Listing of AT Commands ............................................................. 261
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GM29 INTEGRATOR’S MANUAL
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Part 1: Overview
Product Photo/Illustration
1. Introduction
1.1 Target Users
GM29 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 GM29 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 GM29 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 GM29
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 GM29, 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. GM29 Modem
2.1 Description
The dual band EGSM 900/1800MHz GM29 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 GM29 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
GM29 also has an audio interface allowing an analogue handset to be
connected. When the GM29 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 GM29 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.
GM29 INTEGRATOR’S MANUAL
2.2 Highlights
GM29 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, EGSM 900/1800MHz, 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
14
• 4-wire audio connection
• Antenna connection (FME male)
• R&TTE type approved
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2. GM29 MODEM
2.3 GM29 in a Communication System
Figure 2.1 illustrates the main blocks of a wireless communication
system using the GM29. 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 GM29 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
TE
(DTE)
ME status, responses
AT commands to control MS
MS
(GM29)
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 GM29 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 51.
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GM29 INTEGRATOR’S MANUAL
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
TE
(Application)
RJ11
RJ9
DB9
MS
(GM29)
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. GM29 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 GM29 is a dual band serial modem with the GSM radio
characteristics shown in the table below.
GM29 GSM900 E-GSM 900 GSM1800
Frequency Range (MHz) TX: 890-915
Channel spacing 200kHz 200kHz
Number of channels 173 carriers *8 (TDMA)
Modulation GMSK GMSK
TX phase accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)
Duplex spacing 45MHz 95MHz
Receiver sensitivity at
antenna connector
Transmitter output power
at antenna connector
Automatic hand-over between GSM 900 and GSM1800
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: 935-960
GSM: channels 1 to 124
E-GSM: channels 975 to 1023
< –102dBm < –102dBm
Class 4
2W (33dBm)
TX: 880-890
RX: 925-935
TX: 1710-1785
RX: 1805-1880
374 carriers *8 (TDMA)
DCS: channels 512 to 885
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.
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2.4.3 Voice Calls
2.4.4 Data
GM29 INTEGRATOR’S MANUAL
The GM29 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. GM29
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).
GM29 modems are capable of establishing a CSD communication at
9.6kbps.
• HSCSD (High Speed Circuit Switched Data).
GM29 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 GM29 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
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•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 GM29 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 GM29 is by the external application, via the RS232 serial
interface, using a set of AT commands. The GM29 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. GM29 MODEM
AT commands are used to operate the modem and have a broad range
of functions including:
• configuring general parameters of the GM29;
• 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 GM29 see
“Alphabetical Listing of AT Commands”, page 261.
2.4.8 Interfacing with the GM29
The GM29 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
GM29 INTEGRATOR’S MANUAL
2.6 Precautions
The GM29 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.
When designing the power supply arrangements for the GM29 ensure
that the d.c. cable does not exceed 3 metres. For longer distances please
contact Sony Ericsson Service and Support.
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3. Abbreviations
Abbreviation Explanations
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
ETSI European Telecommunication Standards Institute
3. ABBREVIATIONS
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
RLP Radio Link Protocol
RF Radio Frequency
RTC Real Time Clock
SIM Subscriber Identity Module
Standardisation Sector
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SMS Short Message Service
TA Terminal Adapter
TE Terminal Equipment
TS Telecom Services
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GM29 INTEGRATOR’S MANUAL
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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 GM29 along
with the positions of the different connectors and mounting holes. The
GM29 case is made of durable PC/ABS plastic.
Antenna
connector
R 232 connectorS
LED
Access to
SIM card
Figure 1.1 GM29 viewed from the left side
Mounting hole (x2)
Power
Audio
connector
connector
Figure 1.2 GM29 viewed from the right side
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GM29 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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GM29 INTEGRATOR’S MANUAL
2. Electrical Description
All electrical connections to the GM29 are protected in compliance with
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
28
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 - 32 V Positive power input
2 - - - No connection
3 HR_IN I –0.5 - 32V 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 GM29 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: 1 s < t < 2s
Hard reset: t > 3.5 s
on the modem
VIH > 5V, VIL < 2V
Power on: t > 0.2 s
return path for TO_IN and HR_IN
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4321
1 MICN
2 BEARN
3 BEARP
4 MICP
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GM29 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) ≥4.0V
Output level (dynamic load = 32Ω) ≥2.8V
Distortion at 1kHz and maximum output level ≤5%
Offset, BEARP to BEARN ±30mV
Ear-piece mute-switch attenuation ≥40 dB
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 Ω + 800µH] // 100pF ±20%
Dynamic ear piece [150 Ω + 800µH] // 100pF ±20%
Piezo ear piece 1kΩ + 60nF ±20%
pp
pp
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