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Wireless GSM/GPRS Modems
®
MultiModem GPRS (MTCBA-G)
MMCModem™ GPRS (MTMMC-G)
®
SocketModem GPRS (MTSMC-G)
AT Commands
Reference Guide
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Copyright and Technical Support AT Commands for Wireless GSM/GPRS Modems Reference Guide These Commands Apply to the Following Products: MultiModem® GPRS (MTCBA-G) MultiModem® GPRS-USB (MTCBA-G-U) MultiModem® GPRS with Ethernet Interface (MTCBA-G-EN) MMCModem™ GPRS (MTMMC-G) SocketModem® GPRS (MTSMC-G) PN S000293I, Revision I Copyright This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-Tech Systems, Inc. All rights
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Table of Contents Contents Chapter 1 – Introduction ................................................................................................................................................ 9 Scope of This Document ............................................................................................................................................ 9 Related Documents .............................................................................................................
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Table of Contents Chapter 6 – Network Service Commands .................................................................................................................. 31 Signal Quality +CSQ ............................................................................................................................................... 31 Operator Selection +COPS ...............................................................................................................................
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Table of Contents Cell Broadcast Message Identifiers +WCBM .......................................................................................................... 75 Message Status Modification +WMSC ................................................................................................................... 75 Message Overwriting +WMGO ............................................................................................................................... 76 Change or
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Table of Contents Display Configuration &V ..................................................................................................................................... 105 Request Identification Information I ...................................................................................................................... 105 Multiplexing Mode +WMUX .............................................................................................................................
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Table of Contents Chapter 15 – GPRS commands ................................................................................................................................ 149 Define PDP Context +CGDCONT ........................................................................................................................ 149 Quality of Service Profile Requested +CGQREQ .................................................................................................. 151 Quality of S
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Table of Contents Supplementary Services Commands ..................................................................................................................... 195 Data Commands .................................................................................................................................................... 195 V24-V25 Commands ...........................................................................................................................................
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Chapter 1 – Introduction Chapter 1 – Introduction Scope of This Document This document describes the AT-command based messages exchanged between an application and the Multi-Tech Systems, Inc. products in order to manage GSM-related events or services. Related Documents This interface specification is based on the following recommendations: [1] ETSI GSM 07.05: Digital cellular telecommunications system (Phase 2); Use of DTE-DCE interface for Short Message Service (SMS) and Cell Bro
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Chapter 2 – AT Command Features Chapter 2 – AT Command Features Line Settings A serial link handler is set with the following default values (factory settings): • Autobaud • 8 bits data • 1 stop bit • no parity • RTS/CTS flow control Please use the +IPR, +IFC and +ICF commands to change these settings. Command Line Commands always start with AT (which means ATtention) and finish with a character. Information Responses and Result Codes Responses start and end with
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Chapter 3 – General Behaviors Chapter 3 – General Behaviors SIM Card Insertion and Removal Procedures SIM card Insertion and Removal procedures are supported. Software functions rely on positive reading of the hardware SIM detect pin. This pin state (open/closed) is permanently monitored. When the SIM detect pin indicates that a card is present in the SIM connector, the product tries to set up a logical SIM session. The logical SIM session will be set up or not depending on whether the d
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Chapter 3 – General Behaviors Since the maximum length for the numbers in the ADN, FDN, and LND phonebooks is 60 digits: • if the user tries to dial a number that exceeds 60 digits: +CME: 3 Before the user can perform a call, the number of free records in the EF is checked for availability of free space to EXT1 store this number. • If there are free records left, the call is setup. • Otherwise, +CME: 20 error is returned (Memory Full). See Recommendation 3GPP 11.11 for more details.
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Chapter 4 – General AT Commands Chapter 4 – General AT Commands Manufacturer Identification +CGMI Description: Displays the manufacturer identification. Values: No parameters Syntax: AT+CGMI Command Possible responses AT+CGMI WAVECOM MODEM OK Note: Get manufacturer identification Note: Command valid, Wavecom modem Request Model Identification +CGMM Description: Displays the supported frequency bands. With multi-band products the response may be a combination of differe
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Chapter 4 – General AT Commands Product Serial Number +CGSN Description: Allows the user application to get the IMEI (Interrnational Mobile Equipment Identity, 15-digit number) of the product. Values: No parameters Syntax: AT+CGSN Command Possible responses AT+CGSN 012345678901234 OK Note: Get the IMEI Note: IMEI read from EEPROM AT+CGSN +CME ERROR: 22 Note: Get the IMEI Note: IMEI not found in EEPROM Select TE Character Set +CSCS Description: Informs the modem which
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Chapter 4 – General AT Commands Request IMSI +CIMI Description: Reads and identifies the IMSI (International Mobile Subscriber Identity) of the SIM card. The PIN may need to be entered before reading the IMSI. Values: No parameters Syntax: AT+CIMI Command Possible responses AT+CIMI 208200120320598 Note: Read the IMSI OK Note: IMSI value (15 digits), starting with MCC (3 digits) / MNC (2 digits, 3 for PCS 1900) Card Identification +CCID Description: Orders the product to
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Chapter 4 – General AT Commands Power Off +CPOF Description: Stops the GSM software stack as well as the hardware layer or modem activity. The AT+CFUN=0 command is equivalent to +CPOF. Values: No parameters Syntax: AT+CPOF[=1] Command Possible responses AT+CPOF OK Note: Stop GSM stack Note: Command valid AT+CPOF=1 OK Note: Stop the modem Note: Command valid Note: After AT+CPOF[=1], the modem will not respond to AT commands. To reset it, use the hard reset. Note: I n autobaud
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Chapter 4 – General AT Commands Phone Activity Status +CPAS Description: Returns the activity status of the mobile equipment. Values: 0 ready (allow commands from TA/TE) 1 unavailable (does not allow commands) 2 unknown 3 ringing (ringer is active) 4 call in progress 5 asleep (low functionality) Syntax: AT+CPAS Command Possible responses AT+CPAS +CPAS: Note: Current activity status OK Report Mobile Equipment Errors +CMEE Description: Disables or enabl
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Chapter 4 – General AT Commands Clock Management +CCLK Description: Sets or gets the current date and time of the ME real-time clock. Values: String format for date/time is “yy/MM/dd,hh:mm:ss” Note: Valid years are 98 (for 1998) to 97 (for 2097). The second field is not mandatory. Default st date/time is “98/01/01,00:00:00” (January 1 , 1998 / midnight). Syntax: AT+CCLK= Command Possible responses AT+CCLK=”00/06/09,17:33:00” OK Note:
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Chapter 5 – Call Control Commands Chapter 5 – Call Control Commands Dial Command D Description: The ATD command sets a voice or data call. As per GSM 02.30, the dial command also controls supplementary services. Data Calls For a data call, the application sends the following ASCII string to the product (the bearer must be previously selected with the +CBST command): ATD where is the destination phone number. Note: If a GPRS PPP session is already running, the setting of
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Chapter 5 – Call Control Commands Direct Dialing from a Phonebook (stored in the SIM card) can be performed with the following commands: ATD> ; to call from the selected phonebook (by the +CPBS command) ATD> “BILL”; to call “BILL” from the selected phonebook ATD> mem allows direct dialing from a phonebook number is SM, LD, MC, ME, RC, MT or SN. See +CPBS command Syntax: ATD[][;] ATD>[][][;] ATD>[][][;] Command Pos
