This manual will help you learn how to operate and manage your HandyTone-502 Analog Telephone Adaptor and make the best use of its many upgraded features including simple and quick installation, 3- way conferencing, and direct IP-IP Calling. This HT–502 is very easy to manage and configure, and is specifically designed to be an easy to use and affordable VoIP solution for both the residential user and the tele-worker.