Grandstream Networks HT503 FXO User Manual page 10

your reference.
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This document is subject to change without notice. The latest electronic version of this user manual is
available for download from the following location:
http://www.grandstream.com/products/ht_series/ht503/documents/ht503_usermanual_english.pdf
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Reproduction or 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.
FIRMWARE VERSION 1.0.12.4
HT503 USER MANUAL
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