Supports 1 SIP profile through a single FXS port and a single 10/100Mbps port TLS and SRTP security encryption technology to protect calls and accounts Automated provisioning options include TR-069 and XML config files Supports 3-way voice conferencing Failover SIP server automatically switches to secondary server if main server loses connection Supports T.38 Fax for creating Fax-over-IP Supports a wide range of caller ID formats Use with Grandstream?s UCM series of IP PBXs for Zero Configuration provisioning Supports advanced telephony features, including call transfer, call forward, call-waiting, do not disturb, message waiting indication, multilanguage prompts, flexible dial plan and more