User's Guide

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HT81x User Guide

transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose

without the express written permission of Grandstream Networks, Inc. is not permitted.

The latest electronic version of this user manual is available for download here:

http://www.grandstream.com/support

Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc.

in the United States, Europe and other countries.

CAUTION

Changes or modifications to this product not expressly approved by Grandstream, or operation of this

product in any way other than as detailed by this User Manual, could void your manufacturer warranty.

WARNING

Please do not use a different power adaptor with your devices as it may cause damage to the products and

void the manufacturer warranty.