A single 10/100/1000Mbps auto-sensing RJ45 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 feature automatically switches to secondary server if main server loses connection,Supports T.38 Fax for creating Faxover-IP,Supports a wide range of caller ID formats,Use with Grandstreams UCM series of IP PBXs for Zero Configruartion provisioning,Supports advanced telephony features, including call transfer, call forward, call-waiting, do not disturb, message waiting indication, multilanguage promtps, flexible dial plan and more