Copyright and Technical Support
Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 2
AT Commands Reference Guide
Products: MT5600BA-V92, MT5600BR-V92, MT5656ZDX, MT5656ZDX-V
PN S000273G
Copyright
All rights reserved. This publication may not be reproduced.
Copyright © 2002–2009 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 in the content hereof without
obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.
Record of Revisions
Revision Date Description
D 12/13/04 Add note to synchronous clock that Synchronous Online (&M1) must be enabled before
you can set the synchronous clock. Updated voice commands. Add V.25bis commands.
E 05/18/06 Add MT5600BR-V92 as a model covered by this command guide. Removed MT5600BL
as a model covered in this manual; for MT5600BL, use Rev. D of this manual.
F 04/18/07 Updated the Technical Support contact list.
G 10/06/09 Changed range of +VGR to 0-255 with default at 128. Added &EN5 value to &EN Modem-
Initiated Flow Control. Note that L5 is not supported by the MT5656ZDX. Rewrite the
Escape directions on page 4 and 16 (changed ATH<CR> to AT<CR>).
Trademarks
MultiModemII, Multi-Tech, and the Multi-Tech logo are trademarks or registered trademarks of Multi-Tech Systems,
Inc. Other products or brands referenced in this publication are trademarks or registered trademarks of their
respective companies or corporations.
Contacting Multi-Tech Support
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team. Get answers to your most complex questions, ranging from implementation, troubleshooting, product
configuration, firmware upgrades and much more.
To create an account and submit a Support Case on the Portal, visit support.multitech.com
Online Web Portal support.multitech.com
The Knowledge Base provides immediate answers to your questions and gives you access to support resolutions for
all Multi-Tech products. Visit our support area on the website for other support services.
Knowledge Base and Support Services www.multitech.com/en_US/SUPPORT
Technical Support
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Country By Email By Phone
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U.S., Canada, all others: support@multitech.com (800) 972-2439 or (763) 717-586 3
Warranty
To read the warranty statement for your product, please visit:
http://www.multitech.com/en_US/COMPANY/Policies/warranty/
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: 763-785-3500 or 800-328-9717
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