Siemens M1 User Manual

Download



GSM

Module M1

User Guide

Data

Fax

SMS

V.24

Contents

GSM Module M1

Product description Features

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Notes on safety Description of the interfaces

SIM card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

V.24 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Hybrid connector (manufacturer-specific) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Function LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation / startup

Mounting the module Power supply / power consumption

Cable assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Switching the GSM module on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Overvoltage / undervoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Protection / on-board network connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Setting / testing the COM interface Setting the GSM radio transfer rate Registering in the GSM network / PIN entry Setting up and clearing down connections Troubleshooting

GSM module can still be accessed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Connection cannot be set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Own errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

System errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Incorrect characters on screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

GSM module does not dial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cannot receive fax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Overview of AT commands

General AT commands

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

GSM AT commands (GSM 07.07) SMS AT commands (GSM 07.05)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Contents

Technical reference section

The AT standard

AT command line prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connecting to your GSM module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Command syntax of the AT standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Loading the factory configuration and displaying a configuration . . . . . . . . . . . 17

ATVn - Result codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

A/ - Repeat previous command line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting up and clearing down connections

Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Command mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Transparent mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Escape command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

ATH - Go on-hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

ATOn - Return to transparent mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Setting the transfer rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

ATBn - Select GSM module’s operating mode . . . . . . . . . . . . . . . . . . . . . . . . . 21

ATD - Dial a telephone number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Valid dial strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

ATDL - Redial last telephone number used AT%Dn - Automatic dialing with DTR

ATA - Answer a call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

ATS0=n - Auto-answer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Displaying and storing a configuration

AT&F - Load factory profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

AT&V - Display configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Configuring the module using AT commands

Screen outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Limits of screen outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ATEn - Command echo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ATQn - Activate and deactivate result codes . . . . . . . . . . . . . . . . . . . . . . . . 26

ATXn - Extended connect message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Control line options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AT&Cn - Data Carrier Detect (DCD) options. . . . . . . . . . . . . . . . . . . . . . . . . 27

AT&Dn - Data Terminal Ready (DTR) options. . . . . . . . . . . . . . . . . . . . . . . . 28

Data flow control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Memory commands

AT&Zn=x - Store telephone number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

ATDS=n - Dial stored telephone number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

AT&Wn - Store configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

AT&Yn - Configuration at power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

ATZn - Load user profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

. . . . . . . . . . . . . . . . . . . . . . . . . . 26

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Contents

AT+C commands for GSM

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

AT+CGMI - Request manufacturer ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AT+CGMM - Request model ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AT+CGMR - Request revision ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AT+CGSN - Request product serial number ID . . . . . . . . . . . . . . . . . . . . . . . . . 32

AT+CHUP - Hangup call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

AT+CEER - Extended error report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

AT+CMEE - Report mobile equipment error . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

AT+CREG - Network registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

AT+COPS - Operator selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

AT+COPS? - Display current network operator . . . . . . . . . . . . . . . . . . . . . . 36

AT+COPS=? - Display list of available network operators . . . . . . . . . . . . . . 37

AT+COPS= .., .. - Use this network operator. . . . . . . . . . . . . . . . . . . . . . . . 38

AT+CPIN - Enter PIN and query blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

AT+CPIN2 - Enter PIN2 and query PIN2 blocks . . . . . . . . . . . . . . . . . . . . . . . . 40

AT+CPWD - Change password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

AT+CSQ - Signal quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

AT+CKPD - Keypad control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

AT+CXXSN - Single-numbering parameterization . . . . . . . . . . . . . . . . . . . . . . . 44

AT+CXXMOC - Parameterize for outgoing calls . . . . . . . . . . . . . . . . . . . . . . . . 46

AT+CPBS - Select phonebook memory storage . . . . . . . . . . . . . . . . . . . . . . . . 47

AT+CPBR - Read phonebook entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

AT+CPBW - Write phonebook entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

AT+CBST - Select bearer service type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

AT+CRC - Cellular result code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

AT+CLIP - Calling line identification presentation . . . . . . . . . . . . . . . . . . . . . . . 52

AT+CPAS - Phone activity status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

AT+FCLASS - Select mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

AT+CXXCID - Card identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

AT+C commands for the short message service (SMS)

. . . . . . . . . . . . . . . . . . 55

AT+CSMS - Select message service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

AT+CPMS - Preferred message storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

AT+CMGF - Message format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

AT+CSCA - Service center address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

AT+CMGR - Read message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

AT+CMGS - Send message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

AT+CMGW - Write message to memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

AT+CMGD - Delete message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

AT+CNMI - New message indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

AT+CMGL - List messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

AT+CMS ERROR - message service failure result codes . . . . . . . . . . . . . . . . . 60

Fax operation conforming to TR-29.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Contents

The S-registers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

ATSn? - Read an S-register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

ATSn=x - Write to an S-register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Binary and decimal values in S-registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Bit position registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Overview of the S-registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

AT&Tn - Test functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

AT&T0 - Terminate an active test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

AT&T1 - Initiate local digital test loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

ATIn - Display GSM module I-data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Technical data

General V.24 interface Hybrid connector (manufacturer-specific) GSM modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Fax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

GSM documentation

GSM reference documents ETSI contact

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

General information

CE-Sign Service

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

GSM Module M1

Product description

The GSM module is a GSM terminal for transmitting data, faxes and SMS (short message service) text messages in GSM networks (GSM = global system for mobile communication).

The GSM Module M1 comprises the following components:

• GSM transceiver;

• Data and power supply unit;

• Serial interface (V.24) for data transmission and control;

• Manufacturer-specific interface for DC power supply, external antenna and audio signals.

When the GSM Module M1 is registered in the network, it serves as a standard modem for fax and data transmission f or a computer connected to the V.24 interface. Special AT+C commands as per GSM 07.07 or GSM 07.05 for controlling GSM-related functions (PIN entry, network selection, etc.) and for the short message service are available via the V.24 interface.

Features

The GSM Module M1 offers the following features:

• Transparent data transmission at 2400, 4800 and 9600 bps (BS24,25,26);

• Group 3, Class 2 fax transmission conforming to TR-29.2 at 2400, 4800, 7200 and 9600 bps;

• Short message service mobile originated (SMS MO, TS22)

• Short message service mobile terminated (SMS MT, TS21)

Notes on safety

The GSM Module M1 conforms to GSM standards. Ho we v er, note that the device can still emit radiation and therefore must not be used or e v en s witched on in certain environments.

• Leaving the GSM Module M1 switched on in airplanes is prohibited by law.

• The module must not be used near service stations, fuel depots, chemical plants or blasting operations.

• The module may also interfere with the functioning of electronic medical devices (hearing aids, pacemakers, etc.) that are not properly shielded. In case of doubt, consult your physician. Do not touch the antenna during a call.

• Using the GSM Module M1 in the direct vicinity of electronic devices (radios, televisions, PCs, etc.) can cause slight interference.

GSM Module M1

Description of the interfaces

The GSM Module M1 has interfaces for the power supply, for control and data transmission, for an external antenna and for a SIM card as well as an LED that indicates operating statuses. These interf aces will be described below . F or a detailed description including pin assignment, see the section entitled “Technical data”.

SIM card

The GSM Module M1 must have a SIM car d to operate in the GSM network. To install this card, press the yellow button to eject the carrier and insert the SIM in the carrier. Then push the carrier into the housing, making sure that it locks into place.

V.24 interface

The serial interface is used f or cont rolling the GSM Module M1 as w ell as for data, fax and SMS transmission.

Connector: 9-pin DSUB (female) conforming to DIN 41652 Pin assignment: See the section entitled “Technical data” Logic: V.24 asynchronous Baud rates: 2400 - 19200 baud, autobauding Parity: None Character format: 8 data bits Stop bits: 1 Level: Conforming to CCITT Recommendation V.28

Hybrid connector (manufacturer-specific)

The hybrid connector contains the power supply, ignition (for switching the device on and off) and the connection f or the external antenna (GSM 900 MHz antenna). It is connected via the cable supplied.

Pin assignment:

Meaning of pins: See the section entitled “Technical data”.

Function LED

LED off Device switched off – not ready LED flashing slowly Device switched on – ready LED flashing rapidly Device switched on – connection setup

For a detailed function indication, use the corresponding AT commands.

Installation / startup

Mounting the module

Two standard options are available for mounting the GSM Module M1 :

• Retaining clip

•Velcro

Before applying the velcro, make sure that the surface of the M1 (recess provided in center of base) and the corresponding surface are free of dust and oil.

The mounting location must comply with the following environmental conditions:

• Temperature range -20 °C – +55 °C for full operability

• Temperature from insolation < 110 °C

• Light condensation permissible

Power supply / power consumption

Cable assignment

Po w er is supplied via the cable included in the scope of supply. The rele v ant wires ar e marked as follows:

Red POWER +8 V – +24 V DC Violet IGNITION(ON/OFF) Brown GND Ground

Switching the GSM module on/off

The GSM Module M1 switche s on when a positive voltage of 5 - 24 V is applied to IGNITION if a voltage of 8 - 24 V is simultaneously applied to POWER.

The module switches off when a voltage of less than +1 V is applied to IGNITION. An existing call is correctly disconnected. This voltage must be applied for a minimum of 550 ms.

Important:

Be sure to switc h of f the module using IGNITION; simply disconnecting the pow er supply at POWER can damage the SIM if it is being written to at the time.

Voltage range

Nominal voltage: 13,2 V DC Extreme voltage: 8 - 32 V DC

Installation / startup

Overvoltage / undervoltage

Correct operation of the M1 in send mode cannot be guaranteed if input voltages fall below 8 V.

When input voltages exceed 32 V, the supply voltage is disconnected in order to protect the electronic components from an overvoltage.

Input voltages >100 V destroy the module.

Protection / on-board network connection

When installed, the M1 must be protected by a medium time-lag fuse with a nominal value of 1A or a fast f use with a nominal value of 1.6 A. For vehicle installation the M1 must be directly connected to the battery.

Important:

Do not connect the ground cable to the power supply, since this could result in a short circuit via the

Power consumption

antenna cable.

Supply voltage

12 V 130 mA 70 mA 150 mA 220 mA 500 mA 24 V 70 mA 45 mA 150 mA 120 mA 500 mA

Channel search

Standby Send mode

Typical Max. Typical Max.

Setting / testing the COM interface

In order to control the GSM Module M1 and transfer data via the serial interface (COM port), the interface parameters must be set.

The parameters settings are as follows: COM port: 1-4, depending on which one the M1 was connected to Baud rate: 2400 - 19200 baud, autobauding Data bits 8 Parity None corresponds to 8N1 Stop bits 1 Duplex Full

For instr uctions on how to set these parameters, see the user guide for the computer or terminal program used.

Installation / startup

In order to test the interface and your set tings, enter AT. The GSM module should then respond with OK. If it does not do so, configure a different interface in the communication program and try again. Also check the cable. When this test has been successfully completed, check the functionality of the GSM module by entering AT&T1. This command activates a test loop. From now on, all the characters entered from your GSM module should be echoed on the computer. Terminate the test by entering the escape sequence +++. If the test is acknowledged by the NO CARRIER code, the GSM module’s data functionality is operating correctly.

Setting the GSM radio transfer rate

The transf er r ate (baud rate) via the r adio interf ace can be set , for example, using a terminal program. The ATBn command allows you to set the trans f er rate in the GSM network.

Enter the ATI8 command to display the current list.

ATBn [n=7,11,13,25,27,29,70,99] Option Effect

Bit/s Synchronism Distant station ATB99 9600 Asynchronous Mode set to automode ATB7 2400 Asynchronous V.22bis ATB11 4800 Asynchronous V.32 ATB13 9600 A synchronous V.32 ATB25 2400 Asynchronous V.110 ISDN ATB27 4800 Asynchronous V.110 ISDN ATB29 9600 Asynchronous V.110 ISDN ATB70 9600 Fax Fax Group 3

Example:

Enter: ATB13 M1 Permanently switches mode to 9600 bit/s.

Enter: ATB7 M1 Permanently switches mode to 2400 bit/s.

Installation / startup

Registering in the GSM network / PIN entry

In order for the GSM module to access the GSM network, you may have to enter the

PIN for the SIM card. You can do this using the AT+CPIN=“....” command. The

A T+CPIN? command allo ws y ou to inquir e whether or not y ou must enter a passw or d and what type of password must be entered. The following blocks are possible:

• PIN or PUK

• Device code or PUK of the device code

• Network link: the network operator blocks the device so that, without a network PIN, it runs only in its own network. If you wish to operate the device in another network, you must enter the PIN or PUK.

• Service operator link: similar to the network link but implemented by the service operator rather than the network operator (again, you must enter PIN or PUK).

Note:

The PIN (4-8 positions) is the PERSONAL IDENTIFICATION NUMBER and must be entered to unblock the device. You are allowed 3 attempts to enter your PIN. If you enter the wrong PIN 3 times in a row, the PIN is blocked and must be unblocked by means of a PUK (PIN UNBLOCKING KEY). You are allowed 10 attempts.

You can enter the PUK any number of times for the network link and service operator link.

Example:

Enter: AT+CPIN? Queries the password to be entered. GSM module +CPIN: SIM PIN PIN for the SIM card; must be entered. Enter: AT+CPIN=1234 PIN entry M1 OK PIN was correct; the SIM card can be

accessed.

After entering the PIN, y ou can enter the AT+CREG? command to determine whether the GSM module is registered in the GSM network.

Setting up and clearing down connections

Normally, you will set up connections with the aid of your communication program. Howev er, y ou can also manually instr uct y our GSM module to set up and clear do wn a connection. The simplest sequence would be as follows: Load your communication program and enter the following command:

Installation / startup

Enter: AT&F Loads factory configuration. GSM module OK Enter: ATD<tel. no.> The dial command M1 Dials the telephone number and informs

you when it is successful.

CONNECT xxxx "xxxx" is the baud rate for the

connection. The GSM module is now operating in transparent mode, i.e. entries you make via the k eyboard are transmit ted to the distant end.

Pause

Enter: +++ Interrupt command:

Press the “+“ key three times in rapid succession.

Pause M1 returns: OK Changes to command mode. Enter: ATH Command to go on-hook M1 returns: OK The connection is cleared down; M1 has

gone on-hook.

For more information, see Technical reference sec7tion.

Troubleshooting

GSM module can still be accessed

As long as the GSM module is still responding to commands, you can enter the AT&F0 command to load the factory configuration. In any case, this will permit further operation.

• Check whether the communication program is configured for the serial interface to

which the GSM module is connected.

• Check the parameters of your communication program. The following settings will

always work:

Transfer rate 2400 – 19200 baud Data bits 8 Parity None Stop bits 1 Duplex Full

Check whether other programs (e.g. printer spooler) are interfering with the functioning of the communication program. Restart your computer without additional programs, with the operating system alone (switch off and then on).

Installation / startup

Connection cannot be set up

A number of factors can prevent connection setup.

Own errors

• No SIM card in the module.

• The PIN or another block is not unblocked.

• The GSM data module is not registered, i.e. it has not or has not yet been able to

• The M1 was manually set to an unavailable network operator by means of

+COPS=1.

• The M1 was signed off of the network by means of +COPS=2.

• Invalid characters in the dial string.

• Dial string contains more than 30 characters.

• Command line contains more than 39 characters.

System errors

• A connection is already set up.

• The call is not answered within 60 seconds after dialing because the distant station:

– is not ready, – is not a modem, – does not support the selected operating mode. The GSM module returns NO CARRIER.

• The distant station is busy. The GSM module returns BUSY.

• Before the connection can be set up, the GSM module receives a signal from the

computer and returns NO CARRIER. If no connection is set up, the GSM module goes on-hook and returns to command mode.

• The GSM network does not or does not yet support the fax/data modes. The GSM

module returns NO CARRIER.

• The GSM module is not registered in the GSM network. It returns NO DIALTONE.

• You have manually dialed a forbidden network operator; the radio modem no longer

registers.

Installation / startup

Incorrect characters on screen

• Duplicate characters on screen

Cause: Your communication program is set to half-duplex or echo. Remedy: Enter A TE0 to deactivate command echo in command mode or

deactivate the echo in the communication program.

• Only the characters from the distant station are incorrect

Cause: The GSM module’s data format does not match that of the distant sta-

tion.

Remedy: Set the parameters in your communication program accordingly (data

bits, parity , stop bits to 8, N, 1).

GSM module does not dial

Cause: A cable has been disconnected. Remedy: Make sure that all cables are securely connected. T ighten all connecting

screws.

Cause: The GSM network does not or does not yet support the fax/data

modes. The GSM module returns NO CARRIER.

Remedy: Ask your network operator when these modes will be supported in

your network. Cause: The GSM module has activated barred dialing. Remedy: Switch the GSM module off and then on.

Cannot receive fax

Cause: Some fax programs that support TR-29.2 Class 2 expect the bits of the

fax code to arrive in an order different from the one defined in the

SP2388 specification. If the GSM module transmits the fax data bits to

the computer in the wrong order, the fax progr am cannot receiv e whole

fax pages. For this reason, the GSM module has been equipped with

the AT+FOPT=n command. Remedy: Enter one of the following two commands and then c heck whether the

system is functioning correctly: AT+FOPT=1,0 (bit order as specified in

TR-29.2 Class 2, Draft SP2388); AT+FOPT=1,1 (opposite bit order, fac-

tory configuration for all countries). Cause: The GSM network does not yet support the fax/data modes. The GSM

module returns NO CARRIER. Remedy: Ask your network operator when these services will be supported in

your network. Cause: Your network operator has not released your SIM card for the fax/data

modes. Remedy: Ask your network/service operator to release these features.

Overview of AT commands

General AT commands

A/ Repeat previous command line +++ Switch to command mode when connected ATA Answer call ATDx Dial the dial string "x" ATDIx Dial ISDN number "x" ATDL Redial last telephone number used ATDS=n Dial stored telephone number ATE0 Disable command echo ATE1 Enable command echo ATH Disconnect existing connection ATIn Display product data ATI0 Display product code for GSM module ATI1 Display software checksum ATI2 Determine firmware ROM checksum ATI8 Display supported modes ATI9 Display device ID ATO0 Switch from command mode to transparent mode ATQ0 Display result codes ATQ1 Do not output result codes to computer ATSn=x Assign value "x" to S-register "n" ATSn? Read value of S-register "n" ATS0=n Go off-hook after n-th ringing signal (n = "1" - "5") ATS0=0 No automatic answering of calls ATV0 Display result codes as digits ATV1 Display result codes as text ATX0 Display connection without baud rate. Ignore busy signal. ATX1 Display connection with baud rate. Ignore busy signal. ATX2 Same as A T X1 ATX3 Same as ATX1 but report BUSY ATX4 Same as A T X3 ATZn Load user profile "n" AT&C0 DCD always ON AT&C1 DCD line ON only in the presence of carrier signal (connection) AT&D0 Ignore DTR status AT&D1 At DTR -> OFF: Command mode without going on-hook AT&D2 At DTR -> OFF: Go on-hook, command mode, auto-answer off A T&D3 At DTR -> OFF: Go on-hook, factory configur ation same as AT&F AT&F Load factory configuration AT&T0 Terminate an active test AT&T1 Initiate local digital test loop AT&V Display current configuration AT&Wn Store current configuration as user profile "n" AT&Yn Load user profile "n" at pow er-up

Overview of AT commands

AT&Zn=x Store telephone number "x" in memory "n" AT%Dn Automatic dialing with DTR AT+ Fax commands

GSM AT commands (GSM 07.07)

AT+CGMI Display manufacturer ID AT+CGMM Display model ID AT+CGMR Display version of GSM module AT+CGSN Display serial number (IMEI) AT+CHUP Terminate all calls AT+CEER Display reason last call was disconnected AT+CMEE Extended error messages to GSM 07.07 AT+CREG Display registration status AT+COPS Commands relating to network operator selection AT+CPIN Enter PIN and query blocks AT+CPIN2 Enter PIN2 and query PIN2 blocks AT+CPWD Change PIN AT+CSQ Display signal quality information AT+CKPD Key simulation AT+CXXSN Single-numbering parameterization AT+CXXMOC Parameterize for outgoing calls AT+CPBS Select phonebook AT+CPBR Read phonebook entry AT+CPBW Write phonebook entry AT+CBST Select bearer service type AT+CRC Cellular result code AT+CLIP Calling line identification presentation AT+CPAS Phone activity status AT+FCLASS Select mode AT+CXXCID Card identification

SMS AT commands (GSM 07.05)

AT+CSMS Select message service AT+CPMS Preferred message storage AT+CMGF Message format AT+CSCA Service center address AT+CMGR Read message AT+CMGS Send message AT+CMGW Write message to memory AT+CMGD Delete message AT+CNMI New message indications AT+CMGL List messages

Please note: The GSM module also recognizes some AT-standard commands that it does not execute, but it ignores these commands and returns either OK or ERROR.

Technical reference section

The AT standard

With the development of intelligent modems, an command language was introduced in the U.S . called the A T standard. O ver the past f ew year s, this language has been consistently enhanced and has gained international acceptance. Most modems and communication programs work with this command language or can be set to use it.

AT command line prefix

The A T standard is a line-oriented command language. Eac h command line must begin with the letters AT, with the sole exception of the A/ command. The commands are introduced at the end of this section. The letter s A T are also known as the at tention code. The attention code signals your GSM module that one or more commands will follow. The GSM module examines this command line prefix.

Connecting to your GSM module

You have connected your GSM module to your PC. You can now connect to your GSM module. To do so, start up a communication program on your PC.

Set the following transmission parameters (characteristics): COM interface: 1 - 4, depending on which one the M1 is connected to Rate: 2400 - 19200 baud Data bits: 8 Parity: None Stop bits: 1 Duplex: Full

The GSM module supports autobauding on the V.24 interface with transfer r ates fr om 2400 to 19200 baud and the data format 8N1.

Command syntax of the AT standard

• Command lines must always begin with AT.

• Multiple commands can be combined on one command line. To improve legibility, you can enter spaces between the individual commands. The GSM module ignores these spaces.

• Commands that are specified in this manual with "0" in the last position can also be entered without this "0". Example: ATQ has the same effect as ATQ0.

• A command line must end with a <CR> character, which is entered by pressing "Enter" on the keyboard. This fact will not be mentioned again in this manual.

Technical reference section

• The <CR> character can be followed by a <LF> character but this character will be ignored by the GSM module.

Sample command lines:

ATH ATS7?Q0E1 ATD0123456789

• When making corrections, use the Backspace key or Ctrl-H to delete the character to the left of the cursor.

• The command line is not executed until the <CR> character is received.

Loading the factory configuration and displaying a configuration

The A T&F and AT&V commands allow y ou to load and display the f actory configuration. Enter: AT&F0

M1 returns: OK Enter: AT&V

M1: Loads the factory configuration and transfers it to the PC.

The settings are displayed on the screen.

ATVn - Result codes

The GSM module acknowledges all commands.

Example:

Enter: AT&F0 M1 returns: OK

The ATVn command allows you to determine whether result codes will appear as alphanumeric text or a numerical code:

ATVn [n=0,1] Option Result A TV0 Selects the short result code format (digits). Useful if the GSM module is

to be controlled from the computer using a communication program.

ATV1 Selects the long result code format. Factory configuration.

Technical reference section

Overview of the short and long result code formats

Short

Long code Meaning

code

0 OK Command executed, no error 1 CONNECT Connection set up 2 RING Ringing signal detected 3 NO CARRIER Connection not set up or disconnected 4 ERROR Incorrect command or command too long.

The AT+CMEE= 2 command allows you to display

extended error messages to GSM 07.07. 6 NO DIALTONE Connection cannot be set up. 7 BUSY Distant station busy

10 CONNECT 2400 Connection at 2400 bit/s 30 CONNECT 4800 Connection at 4800 bit/s 32 CONNECT 9600 Connection at 9600 bit/s

Please note:

In both cases, result codes are made up of ASCII characters. Long result codes must begin and end with <CR> and <LF> characters. Short result codes only end with a <CR> character.

A/ - Repeat previous command line

The A/ command allows you to reissue the previous command line in its entir ety. This is the only command that is not preceded by AT and that does not have to end with <CR> (Enter). A/ is mainly used when the line was busy or the call was not answer ed. In this case, the GSM module repeats the dial command.

Example:

Enter: AT D 01999341 GSM module: BUSY

Enter: A/ GSM module: Reissues the command (= D 01999341).

Technical reference section

Setting up and clearing down connections

Once you have read through this section, y ou will be able to use y our GSM module together with your communication program to perform the following functions:

• Interrupt a connection using the escape command.

• Go off-hook.

• Set up a connection by manually dialing the telephone number.

• Store a telephone number.

• Dial a stored telephone number.

• Answer a call.

• Switch to auto-answer.

Operating modes

The GSM module operates in two different modes:

• Command mode

• Transparent mode

Command mode

When you switch on y our sy stem, the GSM module is in command mode and is ready to receive and execute your commands. All characters that the GSM module receives via the COM interface in this mode are interpreted as commands and, if a phone connection is present, are not transferred to the distant station.

Transparent mode

In transparent mode, the GSM module transf ers e v ery c har acter sent and recei ved via the COM interface just as it is.

Escape command

Befo re attempting to dial your firs t call, y ou must kno w ho w to inter rupt or disconnect a call at any time. This involves the following two steps:

•Enter

• Disconnect the call by entering ATH.

Example:

Situation: The GSM module is operating in transparent mode, i.e. a connection is set up to a distant station.

Change to command mode:

• Do not press any key for at least one second.

• Press the

• Do not press another key for at least one second. The GSM module switches to command mode, i.e. it interrupts the flow of data and

 to switch to command mode.

 key three times in rapid succession (within one second).

Technical reference section

returns the result code OK. The connection is not y et cleared do wn. T he pause before and after the "+" c har acters ensur es that the GSM module will interpr et this command as the escape command in transparent mode and will then switc h to command mode.

Going on-hook

• Disconnect the call by entering ATH (see next section).

ATH - Go on-hook

In command mode, the ATH command causes the GSM module to disconnect an existing call. The call is also disconnected if the distant station goes on-hook or the radio connection in the GSM network is interrupted.

ATOn - Return to transparent mode

If you wish to interrupt the data flow only briefly, you can use the ATOn command to return your GSM module to transparent mode, i.e. the data flows once again.

ATOn [n=0] Option Result ATO0 Switches the GSM module back to transparent mode when it was previ-

ously switched to command mode.

Setting the transfer rate

The GSM module supports the following tr ansfer rates:

Transfer rates Rate

Bit/s

Bearer service

Corresponding modem types

2400 24 Analog modems conforming to V.22bis,

ISDN adapter to V.110 ISDN

4800 25 Analog modemso conforming to V.32 with

fallback, ISDN adapter to V.110 ISDN

9600 26 Analog modems conforming to V.32,

ISDN adapter to V.110 ISDN

To change and permanently set the rate for the radio link, use the ATBn command.

Technical reference section

Example:

Your PC is set to 19200 baud, i.e. higher than the maximum GSM transfer rate of 9600 bit/s. This means that the GSM module receives more data from the PC than it can transfer to the GSM network. In order to pr e vent a data o verflo w, the module must be able to interrupt the data flow from the PC. T his is accomplished b y means of the R TS/ CTS hardware data flow control.

ATBn - Select GSM module’s operating mode

The ATBn command also allows y ou to set the GSM module’s operating mode permanently for all connections.

ATBn [n=7,11,13,25,27,29,70,99]

Result

Option

ATB99 Automatically sets the mode to match

ATB 7 2400 Asynchronous V.22bis ATB11 4800 Asynchronous V.32

Bit/s Synchronism Dist ant station

the baud rate set for the PC. Factory configuration

ATB13 9600 Asynchronous V.32 ATB25 2400 Asynchronous V.110 ISDN ATB27 4800 Asynchronous V.110 ISDN ATB29 9600 Asynchronous V.110 ISDN ATB70 9600 Asynchronous Fax Group 3

Example:

Enter: ATB13 GSM module: Permanently switches the mode to 9600 bit/s with the result that

all radio connections are permanently set to a transfer rate of 9600 bit/s.

Enter: ATB99 GSM module Automatically changes to the rate of the COM interface.

Technical reference section

ATD - Dial a telephone number

In order to dial a telephone number, enter the ATD command followed by the number.

Example:

Enter: ATD 0199341 GSM module Dials the telephone number 0199341. and returns: CONNECT 2400

As soon as the module detects the carrier for the distant station, it returns the CONNECT result code. Data transfer can now begin.

Valid dial strings

• A dial string comprises digits from "0" to "9" (the telephone number), letters "A" to "C" and the special dialing characters "i","+" and ";".

i This character must be located between the ATD command and the

telephone number (ATDix) and causes the GSM module to switch to ISDN mode for this call.

+ This character must be located at the beginning of a dial string and

serves to access the international exchange of a GSM network.

Example:

You are in Sweden and wish to set up a connection to Munich. Dial: ATD+4989<telephone number>

• A dial string must contain no more than 30 characters. A longer string will not be dialed.

• A command line including the dial string must not exceed 39 characters. Although longer command lines are displayed, they are rejected in their entirety.

Example:

ATD0045890235168338 This dial string comprises 1 6 c har acter s. T he command line on the screen contains 19 characters.

Technical reference section

ATDL - Redial last telephone number used

This command allows you to redial the last telephone number that you dialed, regardless of whether the last dialing attempt was successful.

Example:

Enter: ATD123456789 GSM module dials 123456789 GSM module: BUSY T he number is busy.

Enter: ATDL GSM module: Redials 123456789.

AT%Dn - Automatic dialing with DTR

The AT%Dn command allows you to activate and deactivate automatic dialing of the telephone number stored in telephone number memory "0". The number is dialed if the computer sets the DTR control line connected to the COM interface to ON.

AT%Dn [n=0..1] Option Result AT%D0 Deactivates automatic DTR dialing. AT%D1 Activates automatic DTR dialing if DTR switc hes fr om OFF to ON;

dials the telephone number "x" that was stored in telephone number memory "0" by means of the AT&Z0=x command.

Example:

Enter: AT&Z0=123456789 Stores the telephone no. "123456789"

in telephone number memory "0".

GSM Data_Module: OK Telephone number has been stored. Enter: AT%D1 Activates DTR dialing.

GSM module: OK Command has been executed.

DTR is OFF DTR switches ON "123456789" is dialed automatically. DTR switches OFF GSM module goes on-hook.

Technical reference section

ATA - Answer a call

The GSM module does not automatically answer calls after you switc h on your computer. In accordance with the factory configuration, it does not go off-hook. The ATA command causes your GSM module to go off-hook when the phone rings. You determine whether or not you wish to answer.

ATS0=n - A uto-answer mode

The ATS0=n command allows you to configure your GSM module so that it will automatically answer calls. "n" represents the number of ringing signals before the call is answered. Permissible values are from "0" to "5".

ATS0=n [n=0..5] Option Result ATS0=0 No auto-answer: incoming calls are ignored. ATS0=1 The GSM module goes off-hook after the first ringing signal. ... etc. ATS0=5 The GSM module goes off-hook after the fifth ringing signal.

You can use the ATA command to answer calls at any time, regardless of these settings.

Displaying and storing a configuration

The GSM module works with a set of parameters that determine its functioning. This set of parameters is called the active configuration profile. V alues f or these parameters are predefined in a factory configur ation that you can use at any time when you load it using the AT&F command. The GSM Module M1 allows you to modify the active configuration profile by means of AT or S-register commands. These options will be described in subsequent sections. When you switch off the GSM module, any changes you made to the active configuration pr ofile ar e lost. W hen you switch it on again, the active configuration profile once again corresponds to the factory configuration. However, the GSM module has two non volatile memory bloc ks in whic h y ou can st ore configuration profiles (AT&Wn command, page 29). These blocks ar e user pr ofiles "0" and "1". When you switch on y our s y stem, the GSM module loads the user profile that y ou set by means of the AT&Yn command. For more information, see the section entitled “AT&Yn - Configuration at power-up”.

Please note: When the module is supplied, both user memories contain the factory profile.

Technical reference section

AT&F - Load factory profile

This command allows you to load the factory profile that was supplied with the GSM module.

AT&F Option Result AT&F If your GSM module stops functioning due to a faulty configuration,

this command resets the module to the factory configuration.

AT&V - Display configuration

The A T&V0 comman d allows yo u to display the activ e configuration prof ile on the screen. Enter: AT&V The GSM module then transfers the inf ormation to the computer, which displays it on

the screen.

Example:

You have a GSM module and have loaded the factory configuration by means of the AT&F command. Now enter the AT&V command. The following is displayed on the screen:

AT&V ACTIVE PROFILE: B99 E1 L2 M1 Q0 V1 X4 Y0 %D0 &C1 &D2 &G0 &Y0 S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:060 S08:002 S09:006 S10:007 S12:050 S14:6AH S16:00H S18:000 S21:30H S22:46H S23:1CH S25:005 S26:001 S27:00H

STORED PROFILE 0: B99 E1 L2 M1 Q0 V1 X4 Y0 &C1 &D2 &G0 S00:000 S14:6AH S18:000 S21:30H S22:46H S23:1CH S25:005 S26:001 S27:00H

x S27:00H

STORED PROFILE 1: B99 E1 L2 M1 Q0 V1 X4 Y0 &C1 &D2 &G0 S00:000 S14:6AH S18:000 S21:30H S22:46H S23:1CH S25:005 S26:001 S27:00H

x S27:00H

TELEPHONE NUMBERS: &Z0= &Z1= &Z2= &Z3=

Technical reference section

Configuring the module using AT commands

This section describes the standard AT commands that allow you to configure your GSM module. These commands are grouped according to subject area.

Screen outputs

Limits of screen outputs

When you receive data that is r eproduced on the screen (data ec ho), the text is usually shifted upward when the edge of the screen is reached. When you generate screen outputs using A T commands (e.g. AT&V), a maximum of 30 lines is display ed for each command. If, for example, you enter the AT&V command several times on the same line (AT&V&V&V), a maximum of 30 lines is displayed.

ATEn - Command echo

The A TEn command af f ects the echo of c haracters that the GSM module receiv es from your computer when the GSM module is in command mode.

ATEn [n=0,1] Option Result ATE0 Command echo off: Select the ATE0 setting when the computer itself is

echoing keyboar d entries on the scr een and no command ec ho is expected from the GSM module. Please note: If you enter the ATE0 command and your computer is expecting char acter echo, the computer will no longer display the entered characters on the screen. You are then working blind.

ATE1 Command echo on: Select the ATE1 setting when your computer is con-

figured to expect the characters received by your GSM module to be returned. Factory configuration.

ATQn - Activate and deactivate result codes

The A TQn command allo ws you to control the transmission of r esult codes as ackno wledgments to AT commands (e.g. OK, ERROR, RING).

ATQn [n=0,1] Option Result ATQ0 Outputs result codes. ATQ1 Suppresses result codes. Important for unattended operation.

Technical reference section

ATXn - Extended connect message

ATXn [n=0..4] Option Result A TX0 The GSM module returns only the CONNECT code as soon as a satisfac-

tory connection has been set up. A busy signal is ignored.

A TX1 The GSM module transmits an extended connect message with transfer

rate information (CONNECT xxxx) as soon as a satisfactory connection has been set up. For more information on extended result codes, see the AT V1

command. A busy signal is ignored. ATX2 Same as ATX1. A TX3 As in the case of ATX1, the GSM module transmits an extended connect

message. A bus y signal is detected and, if applicable, the BUSY code is

returned. A TX4 As in the case of ATX1, the GSM module transmits an extended connect

message. A bus y signal is detected and, if applicable, the BUSY code is

returned.

Control line options

AT&Cn - Data Carrier Detect (DCD) options

This command affects the DCD line connected to the computer’ s serial interface.

AT&Cn [n=0, 1] Option Result AT&C0 The GSM module sets the DCD control line connected to the computer’s

serial interface to ON regardless of the data carrier status of the distant station.

AT&C1 DCD specifies the data carrier status of the distant station. DCD ON

indicates that a connection exists.

Technical reference section

AT&Dn - Data Terminal Ready (DTR) options

AT&Dn [n=0..3] Option Result AT&D0 The GSM module ignores the status of the DTR control line connected

to the COM interface.

A T&D1 When the DTR line switches from ON to OFF, the GSM module changes

to command mode. The existing connection to the distant station is not cleared down.

AT&D2 When the DTR line switches from ON to OFF, the GSM module sets up

a connection to the distant station, switches to command mode and deactivates auto-answer mode. Auto-answer can be reactivated by resetting DTR to ON.

A T&D3 The transition of DTR to OFF has the same effect as an AT&F command,

i.e. the factory configuration is loaded. An existing connection to the distant station is cleared down.

Data flow control

Even if your PC is set, for example, to 19200 baud, the maximum GSM rate that can be used is 9600 bit/s. A higher setting causes the GSM module to receive more data from the PC than it can transfer to the GSM network. In order to prevent a data overflow, it must be able to interrupt the data flow from the PC. This is accomplished by means of the RTS/CTS hardware data flow control, which switches over the COM interface so as to interrupt the RTS (computer) and CTS (GSM module) control lines.

Memory commands

The GSM module is equipped with a 128-byte nonvolatile RAM in whic h the values of the modifiable S-registers and other values are stored. This section describes the values, how to store them and how to use them.

Technical reference section

AT&Zn=x - Store telephone number

The user memory can hold 4 telephone numbers. The AT&Zn= command allows you to store a dial string in telephone number memory "n" (n represents a value fr om "0" to "3").

Example:

Enter: AT&Z0 = 01999341 GSM module: OK

The A T&Zn= command sav es only digits and special character s ("i", "+"). It ignores punctuation, spaces and all meaningless characters. The dial string must contain no more than 20 characters. If you enter a longer dial string, it is not stored and the ERROR code is displayed on the screen. The AT&Zn= command itself is not stored with the dial string.

ATDS=n - Dial stored telephone number

The ATDS=n command allows y ou to dial the "n"-th stored telephone number (n r epr esents a value from "0" to "3"). This command dials the dial string as though it were a telephone number entered directly via the keyboard.

Example:

Enter: ATDS=0 GSM module: 01999341 and initiates the dialing procedure.

AT&Wn - Store configuration

When you modify the active configuration profile using AT or S-register commands, these modifications exist only in the RAM and are deleted when you switch off your GSM module. When switched on again, the GSM module loads the configuration from a nonvolatile memory. The AT&Wn command allows y ou to store y our modifications in this nonvolatile memory. Two separate memory areas are available for this purpose.

AT&Wn [n=0,1] Option Result AT&W0 Stores the active configuration profile in user memory "0". AT&W1 Stores the active configuration profile in user memory "1".

Consequently, you alwa ys have two differ ent user pr ofiles in your GSM module ready to be called up.

Technical reference section

AT&Yn - Configuration at power-up

The A T&Yn command allows you to determine whic h user profile ("0" or "1") will be loaded at power-up.

AT&Yn [n=0,1] Option Result AT&Y0 The profile in user memory "0" will be loaded at power-up.

Factory configuration

AT&Y1 The profile in user memory "1" will be loaded at power-up.

Please note:

When the module is supplied, both user memories contain the factory configuration.

ATZn - Load user profile

Regardless of how your active configuration profile is currently set up, the ATZn command allows you to reload your own user profile at any time. Any existing connection is cleared down.

ATZn [n=0,1] Option Result ATZ0 Load user profile "0". ATZ1 Load user profile "1".

AT+C commands for GSM

Special AT commands are used for contr olling GSM-r elated functions of the GSM Module M1 such as PIN entry, network selection and IMEI output and f or controlling the short message service. These commands start with A T+C and are specified in the Technical Specifications (TS) GSM 07.07 for the general part and GSM 07.05 for SMS from the ETSI (European Telecommunications Standards Institute). Standardization is not yet complete. Some of the commands implemented in the GSM Module M1 may still be changed within the framew ork of the standardization process. F or the purpose of fut ure compatibility, these commands are always prefix ed by +CXX.

Example:

Enter: AT+CXXSN = ? GSM module +CXXSN: 1=voice/FAX

The implementation of the AT+C commands for GSM-related functions of the GSM Module M1 is based on TS GSM 07.07 Version 0.1.0.

Technical reference section

AT+CGMI - Request manufacturer ID

This command provides you with the name of the module manufacturer.

AT+CGMI Option Result AT+CGMI Displays manufacturer.

Example:

Enter: AT+CGMI GSM module: +CGMI: SIEMENS

AT+CGMM - Request model ID

This command provides you with the name of the module.

AT+CGMM Option Result AT+CGMM Displays module name.

Example:

Enter: AT+CGMM Response: +CGMM: M1

AT+CGMR - Request revision ID

This command provides you with the v ersion of the GSM module and the sof tw are creation date.

AT+CGMR Option Result AT+CGMR Displays the version number and creation date.

Example:

Enter: AT+CGMR GSM module: +CGMR: Ver.02.001 10.08.95

Technical reference section

AT+CGSN - Request product serial number ID

This command provides you with the serial number of the GSM module. The serial number has the GSM format.

AT+CGSN Option Result AT+CGSN Displays the serial number. In GSM, each mobile telephone is

assigned a unique number, known as the IMEI (International Mobile Equipment Identity).

Example:

Enter: AT+CGSN GSM module: IMEI: 445199518750

AT+CHUP - Hangup call

This command allows you to terminate all calls.

AT+CHUP Option Result AT+CHUP Terminate all calls.

Example:

Enter: AT+CHUP GSM module: OK

AT+CEER - Extended error report

This command allows you to q uery the reason why the last call w as disconnected. The information ret urned can be useful if ther e were problems with connection setup or if a connection was interrupted.

AT+CEER Option Result AT+CEER Displays reason last call was disconnected.

Technical reference section

Example:

Enter: AT+CEER GSM module: +CEER: 10,08

AT+CMEE - Report mobile equipment error

If an error occurs while you are processing a command b y means of A T+C, the problem may be located in the data or GSM section of the M1. For example, if a data connection is set up, the phonebook cannot be accessed at the same time. Or is the problem in the SIM card? Is it inserted or has the PIN been omitted? Extended error messages help you isolate errors more easily. However, you must first enable these messages from the PC using this command.

AT+CMEE Option Result AT+CMEE=<mode n> Resets the mode. AT+CMEE? Displays the way in which error messages are reported

to the PC.

A T+CMEE=? Displays the modes supported by the M1 in the form of

a complete list of the values that can be assumed by <mode n>.

<mode n> n= [0..2]

0 The error messages are not interpreted but, generally, only an ERROR

code is returned.

1 When an error occurs, an extended message to the PC is gener ated that

specifies the cause of error as a number.

2 Same as “1“ except that the error is output as text.

Technical reference section

Possible error messages in response to an AT+C command 0 Phone failure 1 No connection to phone (transceiver part of M1) 2 Transceiver-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 20 Memory full 21 Invalid index 22 Not found 23 Memory failure 24 Text string too long(+CPBW) 25 Invalid characters in te xt string 26 Dial string too long 27 Invalid characters in dial string 30 No network service 31 Network timeout 100 Unknown

Example:

Enter: AT+CREG? GSM module: +CME ERROR: 10

Technical reference section

AT+CREG - Network registr ati on

Data transmission is possible only if the GSM module is register ed in the network. This command provides you with information on the module’s registration status in the network.

AT+CREG Option Result AT+CREG? Displays mode n and the

registration status < CREG STATUS n>. AT+CREG=? Displays a list of the modes supported. AT+CREG=<mode n> Selects a new mode.

AT+CREG? Command AT+CREG? Result code +CREG: <mode n>, <CREG status>

<mode n> n= [0] 0 Changes in registration status are not forwarded to the PC.

<CREG status> status= [0..3] STATUS n Meaning Explanation 0 Not registered;

ME is not searching for a new oper-

No network operator found; the GSM module cannot register, nor is it searching for a new operator.

ator.

1 Registered The GSM module has successfully registered in

the network and all services are available.

2 Not registered,

but ME is searching for a new operator.

3 Registration

denied.

The M1 is not registered but is searching for a new network operator. See AT+COPS, commands relating to network operator selection.

The selected network cannot be accessed at this time.

4 Unknown The current status in relation to the network

cannot be determined at this time.

Technical reference section

Example:

Enter: AT+CREG? GSM module: +CREG: 0,0 => not registered

AT+COPS - Operator selection

These commands allow you to read out the current network operator, display a list of available network operator s or select a operator directly. Various command extensions are availabl e.

AT+COPS Command Result AT+COPS? Displays current network operator. AT+COPS=? Displa ys a list of network operators that are curr ently

available via radio.

AT+COPS=<mode n>, <format f>,

Allows you to instruct the GSM module to use a specific network operator.

AT+COPS? - Display current network operator

This command displays the network operator that is currently selected. It also pro vides you with information on whether the radio modem has selected this network operator automatically or whether you manually instructed it to select this operator.

A result code with the follo wing format is ret urned in response to the AT+COPS? command:

AT+COPS? Command AT+COPS? Result code +COPS: <mode n>, <format f>, <operator>

Technical reference section

< mode n> n= [0...3] Mode n Meaning Explanation 0 Automatic Network operator is selected automatically. 1 Manual Network operator is selected manually. 2 Sign off of network The GSM-M1 is signed off of the network. 3 Sets format f only. You can select the format for displaying the

network operator. This is true only of the read command AT+COPS?.

<format f> n= [0..2]

0 Long, alphanumeric

format

The operator is displayed in 16-character alphanumeric format.

2 Numeric format The operator is displayed in numeric format.

Operator Network operator The network operator is displayed in

format f.

Example:

Enter: AT+COPS? GSM module: +COPS: 0, 0, " Operator Name "

AT+COPS=? - Display list of available network operators

This command instructs the module to display a list of av ailable network operator s. The list must first be generated. That process can take up to 60 seconds.

AT+COPS=? Command AT+COPS=? Result code +COPS: List with (<STATUS n>,

<operator, alphanumeric format>, <operator, numeric format>)

Technical reference section

Evaluate the result code using the following table:

<+COPS status n> n= [0..3] STATUS n M eaning Explanation 0 Unknown Status unknown 1 Available Netw o rk operator is available. 2 Current This network operator is the one currently in use. 3 Forbidden This network operator is forbidden.

Operator Network

operator

Displays the network oper ator in te xt format and numeric format.

Example:

Enter: AT+COPS=? GSM module: +COPS: (2, “ D1 TELEKOM “, “26201“),

+COPS: (3, “ D2 PRIVAT “, “26202“) OK

AT+COPS= .., .. - Use this network operator

This command allows you to select a netw ork oper ator manually or to activate the automatic selection of a network operator . It is recommended that you first display a list of available network operators.

AT+COPS= <mode n>, <format f>, <operator>

Mode n Mode n specifies how the new network operator is to be selected.

The meaning is the same as for the AT+COPS? read command.

Format f <format f> specifies the format to be used for displaying the operator.

The GSM M1 supports only the numeric format for selection.

Operator The network operator to be used (numeric format).

Example:

Enter: AT+COPS=0 The M1 automatically searches for a operator. M1: OK

Enter: AT+COPS=1, 2, “26201“ GSM module: OK

Technical reference section

Please note:

The GSM module must not register when you select a forbidden operator manually! Otherwise, you will not be able to set up any mor e connections. Display the list to find out which operators are f orbidden and which are allo wed. Use the A T+CREG command to find out whether or not the GSM module is registered. You will also be unable to set up any connections if you have set mode n to “2” (sign off of network).

AT+CPIN - Enter PIN and query blocks

The PIN (personal identification number) is provided to pre vent unauthorized use of the GSM module. The PIN is usually a 4-position secret code. If this block is activ ated, y ou must enter your PIN befor e you can use the module’s full range of functions. When you query the status, the syst em displays result codes r elating to the chip card and tells you either that you must enter a PIN or that the chip card has already been read, in which case PIN entry is unnecessary.

AT+CPIN Command Result AT+CPIN? Queries the PIN that must be entered. AT+CPIN=<PIN>[,

<new PIN>]

PIN entry . The PIN can comprise up to 8 positions. If a PUK must be entered, the PIN is entered at the same time. It will then be stored as a new PIN.

AT+CPIN? Result code Meaning +CPIN: READY M1 expects no further password. All blocks are released

and services are available without restriction. +CPIN: SIM PIN M1 expects the PIN for the SIM card. +CPIN: SIM PUK M1 expects the PUK for the SIM card, including a PIN. +CPIN: PH-SIM PIN M1 expects a device code. +CPIN: PH-SIM

PUK

M1 expects the device PUK, including a PIN that is stored

as a device code.

Technical reference section

Example:

You enter the correct PIN: Enter: AT+CPIN=“1234“

GSM module: OK You enter an incorrect PIN: Enter: AT+CPIN=“1234“

GSM module: +CME: ERROR: WRONG PASSWORD

AT+CPIN2 - Enter PIN2 and query PIN2 blocks

Phase 2 includes SIM cards with an FDN phonebook. You can activate a block on the card in order to restrict the telephone numbers that can be called to those contained in this directory. To modify these entries, you must enter PIN2 with the aid of the AT+CPIN2 command. All entries are similar to those for the AT+CPIN command. This command is accepted only if the card also supports this functionality.

Please note: PIN2 protects the FDN phonebook. In order to modify the FDN phonebook by means of the A T+CPB W=... command, y ou must first enter PIN2. If you hav e not yet done so, an error message is returned. After entering PIN2, you can read or write any number of directory entries without having to enter PIN2 each time. As soon as y ou use a command that is not related to the phonebook, PIN2 is “forgotten”. It is also forgotten if you do not access the phonebook for a period of 5 minutes.

AT+CPIN2 Command Result AT+CPIN2? Queries whether PIN2 has already been entered, must still

be entered or is blocked. AT+CPIN2=<PIN>[,

<new PIN>]

PIN2 entry. PIN2 can comprise up to 8 positions.

If PUK2 must be entered, PIN2 is entered at the same time.

It is then stored as a new PIN2.

AT+CPIN2? Result code Meaning +CPIN: READY M1 does not expect PIN2; it has already been entered. +CPIN: SIM PIN2 M1 expects PIN2 for the SIM card. +CPIN: SIM PUK2 M1 expects PUK2 for the SIM card, including PIN2.

Technical reference section

Example:

You enter the correct PIN2: Enter: AT+CPIN2=“1234“

GSM module: OK You enter an incorrect PIN2: Enter: AT+CPIN2=“1234“

GSM module: +CME: ERROR: WRONG PASSWORD

AT+CPWD - Change password

This command allows you to c hange the passw ord. Since more than one passwor d will be available f or futur e uses, you must specify the name of the passw ord upon entering it.

AT+CPWD Command Result AT+CPWD=? Displays a list of the passwords supported. These cur-

rently include the PIN, device code and PIN2.

AT+CPWD=<name>, <old password>, <new password>

This command instructs the GSM module to change the relevant password. When changing the password, you must enter both the old and new passw ord . Th is ensures that changes can be made only if access is authorized.

Example:

Enter: AT+CPWD=? Requests the list of passwords (SC = SIM,

PS = device code, P2 = PIN2)

GSM module: +CPWD: (“SC,8“,“PS,8“, “P2,8“)

Enter: AT+CPWD= “sc“,“1234“,“4321“ GSM module: OK Password was successfully ch anged.

The following result code is returned if the old PIN you enter is incorrect: Enter: AT+CPWD= “sc“,“0123“,“4321“

GSM module: +CME ERROR: INCORRECT PASSWORD

The password was not changed because the old PIN was incorrect.

Technical reference section

AT+CSQ - Signal quality

The quality of the radio connection between the GSM module and the base station varies depending on environmental conditions. T his command provides you with inf ormation on the current reception quality.

AT+CSQ Command Result AT+CSQ Displays current receive values. AT+CSQ=? Displays a list of values representing receive levels and

receive errors.

AT+CSQ, AT+CSQ=?

Command AT+CSQ

Result code +CSQ: <receive level>, <receive errors>

<receive level> 0 -113 dBm or less 1 -111 dBm

2...30 -109... -53 dBm 31 -51 dBm or greater 99 Unknown or cannot be detected

(As a percentage): See GSM 05.08, section 8.2.4, Range of Parameter.

99 Unknown or cannot be detected

Example:

Enter: AT+CSQ GSM module: +CSQ: 10, 1

Technical reference section

AT+CKPD - Keypad control

This command allows you to simulate k ey strok es on the GSM mobile telephone. Input corresponds to the actuation of keys on the Siemens S3COM.

AT+CKPD Command Result AT+CKPD=<key> Instructs the GSM module to simulate the key <key>. AT+CKPD=? Displays a list of keys that are supported.

AT+CKPD=? Command AT+CKPD=? Result code +CKPD: “0123456789*#CDEISUXYZ[]“ <key> Meaning of the keys 0-9, *,# Key 0 - 9, “*“, “#“ “C“ or “c“ Clears the display. “E“ or “e“ Simulates the End key. “I“ or “i“ Simulates the Info key. “S“ or “s“ Simulates the Start key. “X“ or “x“ Phonebook key “Y“ or “y“ Deletes the last character. “Z“ or “z“ Exits menu. [ Simulates the left softkey. ] Simulates the right softkey.

Example:

You would like to enter the key combination “*#06#“: Enter: AT+CKPD=*#06#

GSM module: OK

Technical reference section

AT+CXXSN - Single-numbering parameterization

Some GSM network operators support single-numbering and some support multinumbering. Y ou can determine which f orm of numbering is supported by your operator from whether your chip card has one number or more than one number at which it can be called for multiple voice or data services.

Example:

• You apply for the 9600 bit/s data and fax transmission services from your network operator and receive 2 telephone numbers with your chip card, one for when you wish to be called via the 9600 bit/s data service and one so that you can be reached via the fax service. This means that your network operator supports multinumbering.

• You have received only one telephone number for the 9600 bit/s data and fax services. This means that your network operator supports single-numbering. (Singlenumbering is not supported in Germany.) When another party wishes to reach you, your telephone must decide which service will answer the call before it rings. If you set your GSM module to fax, all incoming calls will be answered by the FAX service.

AT+CXXSN Command Result AT+CXXSN Displays the value currently set for +CXXSN. AT+CXXSN=<SN mode> Sets the single-numbering receive mode to the rele-

vant mode.

A T+CXXSN=? Displays a list of values for single-numbering r eceive

modes.

Technical reference section

AT+CXXSN=? Command AT+CXXSN=? Result code +CXXSN: <0,1,2> <SN mode> Meaning of the mode 0 The next incoming call will be answered by the voice service

(TS11).

1 The next incoming call will be answered by the voice/fax service.

This is required if your network operator supports only TS61 and not TS62.

2 The next call will be answered by the fax or data service, depend-

ing on the active application on your PC. If a fax application is active, the module answers the call as a fax call.

Example:

You wish to set the SN mode to fax/data: Enter: AT+CXXSN=2

GSM module: OK

Technical reference section

AT+CXXMOC - Parameterize for outgoing calls

The following services are available for fax transmission in GSM:

• Teleservice 61 (TS61) Combined voice and fax This service exists as an imitation of combination fax machines and allows you to change from a voice connection to fax transmission.

• Teleservice 62 (TS62) Automatic fax This service is purely for faxing.

If your network operator supports only one of these services, you can use this command to configure your GSM module accordingly. You must do this in networks that support only TS61 if you are to be able to send or receive faxes at all.

AT+CXXMOC Command Result AT+ CXXMOC Displays value currently set for + CXXMOC. AT+ CXXMOC <MOC mode> Sets the single-numbering receive mode to the

relevant mode. AT+ CXXMOC =? Displays a list of values for MOC modes.

AT+ CXXMOC =? Command AT+CXXMOC=? Result code +CXXMOC: <0,1> <MOC mode> Meaning of the mode 0 Fax calls to the radio network are set up using

TS62.

1 All outgoing fax calls are set up using TS61 fax/

voice, but calls are terminated when the fax transmission is terminated.

Example:

You wish to set the MOC mode to TS61: Enter: AT+CXXMOC=1

GSM module: OK

Technical reference section

AT+CPBS - Select phonebook memory storage

When reading or writing a phonebook entry, you must tell the M1 which phonebook memory will be aff e cted b y the subsequent re ad/write jobs. T he f ollo wing phonebook memories are supported in the M1:

• Phonebook on the SIM card

• Last number redial memory

• Own telephone numbers

• FDN phonebook (if this is also supported by the SIM card)

AT+CPBS Command R e su lt AT+ CPBS= dir. Selects a new phonebook. AT+ CPBS? Provides you with information on which phonebook is cur-

rently activated.

AT+ CPBS=? Displays a list of all the telephone directories supported.

AT+CPBS=? Command AT+CPBS=? Result code +CPBS: “MD“ , “SM“ , “OW“ , “FD“

Meaning

MD Last number redial memory; displays the last telephone num-

bers that you dialed.

SM SIM card; this is the standard phonebook containing the

entries.

OW Own telephone number; this phonebook contains your own

telephone numbers under which you can be reached. Normally, you only need to read this directory since you cannot call your own number and it does not change.

FD Fixed dialing number; this is a second phonebook. If the rele-

vant block is set, only the numbers fr om this FDN phonebook can be called. This phonebook and the block are protected by PIN2.

Technical reference section

AT+CPBR - Read phonebook entries

This command allows you to read the phonebook that was selected by means of the AT+CPBS command. You must also enter the number of the relevant position or a range of numbers.

AT+CPBR Command Result A T+CPBR=index1[,inde x2] Reads the phonebook entry with the number index1.

If you also enter a second index, reads the phonebook from index1 to index2.

AT+CPBR=? Provides you with information on the maximum

number of entries that can be contained in the directory and the maximum size of these entries.

The test command provides you with information on the f ormat of the phonebook t hat was selected by means of AT+CPBS.

AT+CPBR=? Command AT+CPBR=? Result code +CPBR: <index>, <number length>, <text

length>

Meaning Index Maximum number of entries in the phonebook Number length Length of a telephone number Text length Length of a telephone number name

Technical reference section

AT+CPBW - Write phonebook entry

This command allows you to write an entry to the phonebook. You have the option of entering the telephone number with or without a name.

AT+CPBW= [index][,number, [type], [text]]

Meaning

Index Stores the entry with the position number “index” in the phonebook.

If you omit the index, an available position is sought; otherwise, the entry is written to the specified position, regardless of whether this position is already being used. If you specify only an index without a

number or text, this means that you wish to delete the relevant entry. Number Number to be written to the phonebook Type International 145

Other 129

Type of number; can be omitted.

If no type is specified, the type is automatically generated from the

telephone number.

A “+“ character at the beginning of the telephone number means that

its type is international. Text Name to be stored with this number

Technical reference section

AT+CBST - Select bearer service type

This command selects the bearer service with data rate and the connection element to be used when data calls are originated.

AT+CBST Command Result AT+CBST=[<speed>

Selects new speed, name and ce

[,<name>[,<ce>]]] AT+CBST? Displays speed, name and ce AT+CBST=? Displays list of supported speed, list of supported

name and list of supported ce (Connection Elements)

<speed n> n=[0,4,6,7,68,70,71] 0 autobauding 4 2400 bps (V.22bis) 6 4800 bps (V.32) 7 9600 bps (V.32)

68 2400 bps (V.110) 70 4800 bps (V.110) 71 9600 bps (V.110)

<name n> n=[0]

0 asynchronous modem

<ce n> n=[0]

0 transparent

Technical reference section

AT+CRC - Cellular result code

This command controls whether or not the extended f ormat of incoming call indi cation is used. When enabled, an incoming call is indicated with unsolicited result code + CRING: <type> instead of the normal RING.

AT+CRC Command Result AT+CRC? Displays mode n AT+CRC=? Displays a list of supported modes AT+CRC=<mode n> Selects a new mode

AT+CRC? Command AT+CRC? Rsult Code +CRC: <mode n>

<mode n> n=[0,1] 1 enables extendet format 0 disables extendet format

+CRING: <type>

<type> Meaning

ASYNC asynchronous transparent

FAX facsimile

Technical reference section

AT+CLIP - Calling line identification presentation

This command refers to the GSM supplementary service CLIP (Calling Line Identification Presentation) that enables a called subscriber to get the calling line identity (CLI) when receiving a call.

The set command + CMP=<n> enables or disables the presentation of the CLI at the M1. It has no effect on the ex ecution of the service CLIP in the network. When enabled +CLIP: <number>,<type> response is returned after every RING result code.

The read command +CLIP? gives the status of mode n and also triggers an interrogation of the provision status of CLIP in the network.

AT+CLIP Command Result AT+CLIP? Displays mode n, mode m AT+CLIP=? Displays a list of supported modes n AT+CLIP=<mode n> Selects new mode

AT+CLIP? Command AT+CLIP? Result Code +CLIP: <mode n>,<mode m>

<mode n> n=[0,1] 1 enables extendet format 0 disables extendet format

<mode m> m=[0,1,2] 0 CLIP not provisioned 1 CLIP provisioned 2 unknown

Technical reference section

AT+CPAS - Phone activity status

This command returns the activity status of the GSM module M1. It can be used to interrogate the M1 before requesting action.

AT+CPAS Command Result AT+CPAS Displays status AT+CPAS=? Displays a list of supported stati

AT+CPAS=? Command AT+CPAS=? Result Code +CPAS: 0 1 2 3 4 5

0ready 1 unavailable 2 unknown 3 ringing 4 call in progress 5 asleep

Technical reference section

AT+FCLASS - Select mode

This command puts the M1 into a particular mode of operation (data, fax).

AT+FCLASS Command Result AT+FCLASS? Displays mode n AT+FCLASS=? Displays a list of supported modes AT+FCLASS=<mode n> Selects new mode

AT+FCLASS? Command AT+FCLASS=? Result Code 0, 2

0data 2fax

Important

Example: The customer has a D2 card and uses M1 with the follo wing default set tings: +FCLASS=0, B99, +CRC=0 When he receives a call (MTC), "RING" is displayed on his PC. The call can now be ac-

cepted by means of "ATA". The DSA in the M1 accepts the call as a data call proper irrespective of whether it is a data or fax call. T he r eason for this is that B99 causes the incoming service identifier to be ignored. With fax calls, this causes problems of man y kinds because the user does not know which service is being used.

The command "AT+CRC=1" allows the M1 to also indicate the service identifier for incoming calls so that the user what service is being used.

T o ensur e that all units involved in the call accept the call in the proper manner, the user should select the correct service using AT+FCLASS before accepting the call.

Technical reference section

AT+CXXCID - Card identification

Execution of this command displays the SIM number.

AT+CXXCID Command Result AT+CXXCID Displays SIM number AT+CXXCID=? OK

AT+C commands for the short message service (SMS)

The module supports several of the AT+C commands specified in TS GSM 07.05 for using the short message service with the M1. In order to provide an application on the connected computer with complete information on the short messages, the M1 supports PDU mode. A PDU (protocol data unit) contains almost all the information relating to a short message that is transferred in the GSM netw ork. For a more detailed description of the various PDUs, see TS GSM 03.40, which describes the implementation of the short message service.

The implementation of AT+C commands for SMS is based on TS GSM 07.05 Version 4.4.0.

Technical reference section

AT+CSMS - Select message service

This command allows you to select the short message service.

Parameter command syntax

Command Possible response(s) +CSMS=<service> +CSMS: <mt>,<mo>, <bm>

ERROR

+CSMS +CSMS? +CSMS: <service>,<mt>,<mo>, <bm> +CSMS=? +CSMS: (list of supported <service>s)

V a lues im plem ent ed

<service>: 0 GSM 03.40 and 03.41 <mt>,<mo>, <bm> 0 Type not supported 1 Type supported

AT+CPMS - Preferred message storage

This command allows you to select the memory to be used f or read and write operations .

Parameter command syntax

: <err>

Command Possible response(s) +CPMS=<mem1> [,<mem2>] +CPMS: <used1>, <total1>, <used2>, <total2>

ERROR

+CMS +CPMS? +CPMS: <mem1>,<used1>,<total1>,

+CPMS=? +CPMS: (list of supported <mem1>s),

V a lues im plem ent ed

<mem1> String type; memory from which messages are read and deleted

“SM“ SIM message storage

<mem2> String type; memory to which commands are written and sent

“SM“ SIM message storage <total1> Integer type; total number of message locations in <mem1> <total2> Integer type; total number of message locations in <mem2> <used1> Integer type; number of messages currently in <mem1> <used2> Integer type; number of messages currently in <mem2>

: <err>

<mem2>,<used2>,<total2>,

(list of supported <mem2>s)

Technical reference section

AT+CMGF - Message format

This command allows y ou to define the inpu t and output f o rmat of the short message.

Parameter command syntax

Command Possible response(s) +CMGF=[<mode>] +CMGF? +CMGF: <mode> +CMGF=? +CMGF: (list of supported <mode>s)

V a lues im plem ent ed

<mode>: 0 PDU mode

AT+CSCA - Service center address

This command allows y ou to set the SMSC addr ess vi a whic h outgoing short messages are sent.

Parameter command syntax

Command Possible response(s) +CSCA=<sca>[,<tosca>] +CSCA? +CSCA: <sca>,<tosca> +CSCA=?

<sca> GSM 04.11 RP SC address: Address value field in string format <tosca> GSM 04.11 RP SC address: Type-of-address octet in integer

format

Technical reference section

AT+CMGR - Read message

This command allows you to display the short message addressed by <index>.

Action command syntax

Command Possible respons e(s) +CMGR= <index> If PDU mode (+CMGF=0) and command successful:

+CMGR: <stat>, <length><CR><LF><pdu>

Otherwise:

ERROR

+CMS

+CMGR=?

<index> Integer type; value in the range of location numbers supported by

the associated memory

<stat> Integer type in PDU mode; indicates the status of message in memory.

0 Received, unread message (i.e. new message) 1 Received, read message 2 Stored, unsent message 3 Stored, sent message 4 All messages

: <err>

AT+CMGS - Send message

This command allows you to send a short message from the TE to the network. If the short message is successfully sent, the message reference <mr> is returned to the TE.

Action command syntax

Command Possible r esponse(s)

If PDU mode (+CMGF=0):

+CMGS= <length><CR>PDU is given<ctrl-Z/ESC>

+CMGS=?

<mr> GSM 03.40 TP message reference in integer format

If send is successful:

+CMGS:<mr>,

If send fails:

+CMS

ERROR

: <err>

Technical reference section

AT+CMGW - Write message to memory

This command allows you to store a short message in the memory <mem2>. The memory location is returned in <index>.

Action command syntax

Command Possible response(s) If PDU mode (+CMGF=0):

+CMGW= <length> [,<stat>]<CR>PDU

is given

+CMGW=?

AT+CMGD - Delete message

This command allows you to delete a short message from <mem1> at the location <index>.

Action command syntax

Command Possible response(s) +CMGD= <index> +CMS +CMGD=?

AT+CNMI - New message indications

This command allows you to determine ho w the TE wi ll be notified when a short message is received from the network, when the TE is activated.

Parameter Command Syntax

Command Possible response(s) +CNMI=[<mode>[,<mt>[,<bm>[,<ds>

[,<bfr>]]]]]

<ctrl-Z/ESC>

+CMS

ERROR

+CMGW: <index>, +CMS

ERROR

: <err>

+CNMI? +CNMI: <mode>,<bm>,<ds>, <bfr> +CNMI=? +CNMI: (list of supported <mode>s),

(list of supported <mt>s) , (list of supported <bm>s) , (list of supported <ds>s) , (list of supported <bfr>s)

<ds> Sets result code indication routing for SMS-STATUS-REPORTS. <bfr> Defines the handling method for buffered result codes when

<mode> 1,2 or 3 is enabled.

Technical reference section

AT+CMGL - List messages

This command allows you to display the short message with the status <stat> from memory <mem1>.

Action command syntax

Command Possible response(s) +CMGL=[ <stat>] If PDU mode (+CMGF=0) and command successful:

+CMGL:<index>, <stat>, <length><CR><LF><pdu> [<CR><LF>+CMGL:<index>,<stat>,<length><CR><LF>

<pdu>[....]]

Otherwise:

ERROR

+CMS

+CMGL=? +CMGL: (list of supported <stat>s)

AT+CMS ERROR - message service failure result codes

V alue defin itions

<err> Values used by common messaging commands

0...127 Values from GSM 04.11 Annex E-2

128...255 Values from GSM 03.40, section 9.2.3.22 300 ME failure 301 SMS service of ME reserved 302 Operation not allowed 303 Operation not supported 304 Invalid PDU mode parameter 310 SIM not inserted 311 SIM PIN necessary 312 PH-SIM PIN necessary 313 SIM failure 314 SIM busy 315 SIM wrong 320 Memory failure 321 Invalid memory index 322 Memory full 330 SMSC address unknown 331 No network service 332 Network timeout 500 Unknown error

: <err>

Technical reference section

Fax operation conforming to TR-29.2

The GSM module functionally supports the follo wing commands as per th e fut ure EIA/ TIA 592 standard or acknowledges them with OK. For more inf ormation contact: EIAssociation, 2001 Eye Street, N. W., Washington, D. C. 20006, USA, Tel.: (1)-202-4574900 and specify "PN 2388".

Commands and result codes: Prompts AT+FDT= AT+FET= AT+FDR

Commands and result codes: Messages AT+FDCS: AT+FDIS:AT+FDTC:AT+FCFR AT+FTSI: AT+FCSI: AT+FCIG:AT+FHT:AT+FHR: AT+FCON AT+FET: AT+FPTS:AT+FHNG:

Setting parameters AT+FCLASS AT+FMFR?AT+FMDL?AT+FREV? AT+FDCC= AT+FDIS=AT+FDCS=AT+FLID= AT+FPTS= AT+FBUG=

Setting additional parameters AT+FCR= AT+FAAAT+FBUF?AT+FBOR

The S-registers

The active configuration profile for the GSM M1 module is stored in S-registers. Each register is 8 bits long. A number of S-registers are reserv ed and must not be modified! The other registers can be read b y means of the ATSn? command or ov erwrit ten using the ATSn= command. You can modify some S-register values using AT commands. This saves you from having to access the values directly in the S-register, i.e. you do not have to f amiliarize your self with the actual values and meanings of the individual bit positions within the S-register. This section provides an overview of the S-registers. The factory configuration is printed in bold type.

Technical reference section

ATSn? - Read an S-register

The A TSn? command allo ws y ou to read the "n"-th S-r egister. P arameter "n" must be an integer and designate an S-register.

Example:

Enter: ATS0? GSM module: 003

Enter: ATS0?S7? GSM module: 003

030 OK

In response to the ATSn? command, the GSM module displays the register contents as a three-digit decimal number . If more than one register is read on one command line, the GSM module displays the register contents in the order in which the registers appear in the command string. The GSM module transmits a <CR> and <LF> character after eac h set of register contents is display ed. If the command s yntax is incorrect, the GSM module returns ERROR.

ATSn=x - Write to an S-register

The ATSn=x command allows you to instruct your GSM module to store the value "x" in register "n". "n" and "x" must be integers and decimal numbers.

• n must designate an S-register.

• x must be from "0" to "255".

Example:

Enter: ATS0=3 GSM module: OK

This command sets register S0 to the value "3", i.e. the GSM module automatically answers a call af ter 3 ringing signals. T he GSM module acknowledges the command with OK to indicate that the command was executed and a new command can be processed.

Technical reference section

Binary and decimal values in S-registers

Although you enter values f or S-registers as decimal number s, like all other v alues that are stored in PCs they are stored in the registers in binary format:

Bit # 7 6 5 43210 Binary 11111111 Decimal 128 64 32 16 8 4 2 1

The value of the register is obtained by adding together the values of all enabled bits. In the example, all bits are enabled ("1") and the result is the number 255. Since all bits can also be disabled ("0"), a total of 256 statuses can be stored in these 8 bit positions. This means that more than one parameter can be stored in one register.

Example:

Decimal Binary

3 00000011

43 00101011

100 01 100100 If a command applies only to bits 3, 4 and 5 of an S-registers, up to 8 diff erent statuses

can be defined:

Option Bit 5 Bit 4 Bit 3 Dec.

00000 10018 201016 301124 410032 510140 611048 711156

Technical reference section

Bit position registers

Registers in which a number of par ameter v a lues are stor ed ar e called bit position registers. If you wish to modify the parameter va lues in these register s directly, y ou must add up the decimal values of all the bits to be set and enter the result using the A TSn=x command. Since calculating such values is somewhat complicated, we r ecommend that you use AT commands to modify the values and do not write dir ectly to the r egister. However, here is an example of how to do so:

Example:

S-register S22 Bit 7: Reserved, value is "0".

Bits 6, 5 and 4: Connection messages (ATXn command). Bits 3 to 0: Reserved, value is "0".

You wish to enter the following parameter values:

Bit 7: Reserved, value is "0",

Isolated value: binary "0" = decimal "0", Positioned value: binary "0 x x x x x x x" = decimal "0".

Bits 6, 5 and 4: Extended connect message,

ignore busy signal (ATX2), Isolated value: binary "0 1 0" = decimal "2", Positioned value: binary "x 0 1 0 x x x x" = decimal "32".

Bits 3 to 0: Reserved, value is "0",

Isolated value: binary "0 0 0 0" = decimal "0", Positioned v a lue: binary "x x x x 0 0 0 0" = decimal "0".

Decimal input and binary storage:

Bit # 7 6 5 43210 Binary 00100000 Decimal (128) (64) 32 (16) (8) (4) (2) (1)

Enter the decimal total for 0+0+32+0+0+0+0+0=32. Command: ATS22=32

Technical reference section

Overview of the S-registers

Please note:

The tables below do not include the reserved register s. Making entries in these unlisted, reserved registers can cause the GSM module to malfunction.

Sx Meaning S0 Number of ringing signals after which the s ystem w ill answ er automatically,

i.e. the GSM module goes off-hook after the "n"-th ringing signal. Entering a value for n from "1" to "5" activates auto-answer. The maximum value is 5 ringing signals. The value "0" deactiv ates auto-ans w er. The factory setting is "0".

S1 Internal counter for ringing signals. Each incoming ringing signal increments

the register contents by one. If the call was answered, the register is reset to "0" after a preset interv al. This is a read-only register.

S2 ASCII value of the escape command characters. The factory setting for all

countries is "43", which corresponds to the ASCII characters +++. S2 can be set to any value from "1" to "127". If "0" or a value greater than "127" is set, the escape command character is deleted. When the &D1, &D2 and &D3 options are enabled, the GSM module returns to command mode as soon as it detects that the level of the DTR signal has changed from ON to OFF.

S3 ASCII value of the <CR> character. The factory setting for all countries is

"13". <CR> terminates command lines and initiates their execution, as well as terminating result codes. Permissible values are from "0" to "127".

S4 ASCII value of the <LF> character. The factory setting for all countries is

"10". For long, alphanumeric result codes, <LF> is output after the <CR> character. Permissible values are from "0" to "127".

S5 ASCII value of the Backspace character. The factory setting is "8". Permissi-

ble values are from "33" to "127".

S7 Wait time for connection after dialing. If no connection is detected within

the specified period of time, the GSM module goes on-hook. Permissible values are from "0" to "60".

S12 Wait time for AT commands in 50ths of a second. The period of time speci-

fied here must elapse before and after the escape sequence is entered so that the GSM module can recognize it as a command. The factory setting for all countries is "50" (= 1.0 s). Do not set too short of a wait time. Permissible values are from "0" to "255". As a r ule, this v alue should be no less than "20".

Technical reference section

S14: Command echo, result codes Bit Options Values

0 Reserved 0 1 Command echo (ATEn) 01Echo off

Echo on

2 Result codes (ATQn) 01Display result codes

Suppress result codes

3 Short format mode (ATVn) 01Result codes as digits

Result codes as text 4 Reserved 0 5 Reserved 0 6 Reserved 0 7 Reserved 0

S21: DTR and DCD options Bit Options Values

0 Reserved 0 1 Automatic dialing when

DTR OFF -> ON (At%Dn)

2 Reserved 0

DTR options (AT&Dn)

5 DCD options (AT&Cn)

6 Reserved 0 7 Reserved 0

01Automatic DTR dialing on

Automatic DTR dialing off

Ignore DTR

GSM module changes to command

mode when it detects falling edge at

DTR (ON -> OFF)

Same as 1 but also disconnects call.

GSM module is initialized when it

detects falling edge at DTR

(ON -> OFF)

01DCD always ON

DCD with valid carrier

Technical reference section

S22: Result codes Bit Options Values

0 Reserved 0 1 Reserved 0 2 Reserved 0 3 Reserved 0

4 56Result code options (ATXn)

7 Reserved 0

S23: Bit rate and parity

1 2 3 4 5 6 7

Same as ATX0

Reserved

Same as ATX1

Same as ATX2

Same as ATX3

Same as ATX4

Bit Options Values

0 Reserved 0

Transfer rate at the

COM interface

1 2 3 4 5 6 7

Parity

0 1 2

3 6 Reserved 0 7 Reserved 0

Reserved Reserved Reserved 2400 bit/s 4800 bit/s 9600 bit/s 19200 bit/s Reserved

Reserved None Reserved Reserved

Technical reference section

AT&Tn - Test functions

Software test loops If you can still address your GSM module with your communication program, check

module functioning using the softw are test loops. Eac h test is initiated by means of an AT command. Be sure to perform the tests in the sequence described.

AT&T0 - Terminate an active test

You can terminate an active test at any time: Step 1: Enter the escape command “+++“. The GSM module

switches to command mode. Step 2: Enter the AT&T0 command. The test is terminated. Any commands that follow the AT&T0 command on the command line are ignored.

AT&T1 - Initiate local digital test loop

This test loop checks your GSM module and the mobile telephone. If this test is not successfully completed, the problem is located in your GSM module or in a cable connection. Start the test loop and enter a random test message via the keyboard. The GSM module does not send this message to the distant station but, instead, receives it itself. It r et urns the mes sage to the computer, where it is displa y ed on the scr een. If the GSM module correctly echoes the test message to the computer, the module has successfully completed the local digital test.

Please note:

You can initiate this test only if no connection is set up; otherwise, the GSM module returns ERROR.

Situation: Command mode, no connection. Example: Enter: AT&T1

GSM module: OK Enter: ABC

GSM module: ABC You can enter additional test data and check the echo. Terminate this test by entering the following: Enter: +++ Escape command

GSM module: OK Acknowledges escape command Enter: AT&T0 Terminate test.

GSM module: OK Test terminated.

Technical reference section

ATIn - Display GSM module I-data

The ATIn command provides you with information that you should keep ready in case you need to consult your dealer or the manufacturer.

ATIn [n=0,1,2,8,9] Option Result ATI0 Displays GSM module product code. The GSM module transmits the

product code as a 3-digit ASCII string with the format 24x followed by <CR> and <LF>.

ATI1 Displays firmware checksum. The GSM module transmits 3 numeric

ASCII characters followed by <CR> and <LF>.

A TI2 Checks firmware chec ksums. A s the res ult, the GSM module r et urns the

OK or ERROR result code followed by <CR> and <LF>.

ATI8 Displays GSM module’s operating modes:

7 GSM 2400 bit/s duplex asynchronous transparent (V.22bis) 11 GSM 4800 bit/s duplex asynchronous transparent (V.32) 13 GSM 9600 bit/s duplex asynchronous transparent (V.32) 25 GSM 2400 bit/s asynchronous transparent (V.110 ISDN) 27 GSM 4800 bit/s asynchronous transparent (V.110 ISDN) 29 GSM 9600 bit/s asynchronous transparent (V.110 ISDN) 70 GSM Fax transparent, 2400/4800/7200/9600 bit/s (G3) 99 Automatically adapts to PC baud rate

ATI9 Displays GSM module’s version ID. The GSM module transmits its ID.

Technical data

General

Type: M1 Housing: Plastic Dimensions: 116 x 67 x 30 mm Weight: 157 g Memory: Flash EPROM Input voltage: +8 V to +24 V DC Nominal voltage: 13,2 V DC Input current: Max. 500 mA Class of protection: III Temperature range: -20 °C to +55 °C (operating)

-40 °C to +70 °C (storage)

V.24 interface

Connector: 9-pin DSUB (female) to DIN 41652 Pin assignment:

PIN DIN EIA CCITT Designation 1 M5 DCD 109 Data Carrier Detect 2 D2 RX 104 Receive Data (out) 3 D1 TD 103 Transmit Data (in) 4 S1.2 DTR 108.2 Data Terminal Ready 5 E2 – 102 Signal Ground 6 M1 DSR 10 7 Data Set Ready 7 S2 RTS 105 Request To Send 8 M2 CTS 106 Clear To Send 9 M3 RI 125 Ring Indicator

Logic: V.24 asynchronous Baud rates: 2400 - 19200 baud, autobauding Parity: None Character format: 8 data bits Stop bits: 1 Level: To CCITT Recommendation V.28

Technical data

Hybrid connector (manufacturer-specific)

Pin assignment:

Meaning of pins:

PIN Name Used Meaning 1 Power X 8 V - 24 V DC 2 Reserved 3 BF-Bus Reserved 4 NF Ext Reserved 5 TX_E Reserved 6 RX_E Reserved 7 Ignition X Activ at e/deactivate 0 - 24 V 8 Antenna Ext Reserved 9 AUDO_1 Reserved 10 AUDO_2 Reserved 11 HF_MICRO Reserved 12 GNDA Reserved 13 GND X Ground 14 GND Ground

Antenna: Impedance 50 ohms

Technical data

GSM modes

Fax

CCITT Rec.: CCITT T.30, T.4 Routes: MOC and MTC Info.transf.mode: FAX G3 Clock mode: Synchronous Connection elem.: Transparent Structure: Unstructured Radio channel: Full rate Intermed. rate: 8 or 16 kbit/s User rate: 2400, 4800 or 9600 bit/s Teleservice: TS 61, TS 62

Data

GSM Rec.: GSM 7.01, 7.02, 4.21 Routes: MOC and MTC Info.transf.mode: 3.1 Khz audio ex PLMN (analog) or

UDI/V.110 (ISDN) Clock mode: Asynchronous Connection elem.: Transparent Structure: Unstructured Layer 2 protocol: NAV Data bits: 8 Parity bits: None Bits/char. Always 10 bits/char. Stop bits: 1 Radio channel: Full rate Intermed. rate: 8 or 16 kbit/s User rate: 2400, 4800 or 9600 bit/s Modem type: V.22bis, V.32 Bearer service: BS 24, BS 25, BS 26

SMS

GSM Rec.: GSM 03.40, 07.05 Routes: SMS MO and MT Mode: PDU mode Teleservice: TS22, TS21

GSM documentation

GSM reference documents

The following GSM reference documents are recommended: GSM 03.40

GSM 03.45 GSM 04.11 GSM 04.21 GSM 05.08 GSM 07.01 GSM 07.02 GSM 07.05 GSM 07.07

ETSI contact

The Technical Specifications can be ordered from the following address:

European Telecommunications Standards Institute

ETSI Secretariat Postal Address: F-06921 Sophia Antipolis CEDEX - FRANCE Office Address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat Internet: secretariat@etsi.fr Tel.: +33 92 94 42 0 0 - Fax: +33 93 65 47 16

General information

CE-Sign

The GSM Module M1 with its IMEI number is approved f or operation in GSM networks. This device also conforms to the following EU guidelines:

– 89/336/EWG “Electromagnetic Compatibility” – 91/263/EWG CTR5 and CTR 9 – ETS 300342-1

as confirmed by the CE mark.

Service

The current version of this manual and of the M1 sof twar e can be found in the f ollowing mailbox:

Mailbox telephone number: +49 89 722 46555

General information

Issued by Private Communication Systems Group Hofmannstraße 51 D-81359 Munich

Siemens Aktiengesellschaft

Subject to availability Right of modification reserved

Order No.: A24859-N4000-A100-1-7677 Printed in Germany (02/96)

Particularly environmentally friendly paper

50% recycled

50% chlorine bleached

Siemens M1 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual