User's Guide
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HT81x User Guide 
WELCOME 
The HT81X analog telephone adapters provides transparent connectivity for analog phones and faxes to 
the world of internet voice. Connecting to any analog phone, fax or PBX, the HT81Xare an effective and 
flexible solution for accessing internet-based telephone services and corporate intranet systems across 
established LAN and internet connections. The Grandstream Handy TonesHT81Xare a new addition to the 
popular HandyTone ATA products family. This manual will help you learn how to operate and manage your 
HT81X analog telephone adaptors and make the best use of its many upgraded features including simple 
and quick installation, 3- way conferencing, direct IP-IP Calling, and new provisioning support among other 
features. This HT81Xare very easy to manage and configure, and specifically designed to be an easy to 
use and affordable VoIP solution for both the residential user and the teleworker. 










