Copyright and Technical Support
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 2
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 reserved. Copyright © 2003-2008, by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech
Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the content hereof
without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.
Revisions
Revision Level Date Description
A 07/15/03 Initial release.
B 03/08/04 Added Values to each command. Added new commands.
C 09/28/04 Changed data/fax call to ATD<nb>; and voice call to ATD<nb>
Changed Autobauding is supported (operating from 2400 to 115200)
D 08/04/05 Added “Length of Phone Numbers” section to Chapter 3. Changed maximum length of
phone numbers to 60 digits. Added <mode> to +CMGF values. Added new command,
+CMMS. Removed values 2 and 4 from \N. Increased I/O ports to ten in the index value
of +WIOR and +WIOW. Added more text to +WRIM. Removed one note from +CGCONT.
Changed the font size from 10 point to 9 point; this brought the manual under 200 pages.
E 01/23/06 Added ®and ™ to products listed on the cover.
F 05/10/07 Added the +WMBS, a command that supports quad band builds. Updated the Technical
Support contact list.
G 08/24/07 Updated the +WIND command.
H 01/16/08 Updated the cover and MMCModem product name.
I 09/25/08 Updated the +ECHO commands and removed Fax commands. Removed all references to
HR (Half Rate). Added four new Phonebook commands: WCOS, WPGW, WPGR, WPGS.
Added SMS Command: WMCP. Updated to version 6.57d.
Trademarks
MultiModem, SocketModem, and the Multi-Tech logo are registered trademarks of Multi-Tech Systems, Inc.
MMCModem is a trademark of Multi-Tech Systems, Inc.
Technical Support
Country By Email By Phone
Europe, Middle East, Africa: support@multitech.co.uk +(44) 118 959 7774
U.S., Canada, all others: support@multitech.com 800-972-2439 or 763-717-5863
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: 763-785-3500 or 800-328-9717
Fax: 763-785-9874
Internet Address: http://www.multitech.com
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