- 1 SIP account up to 2 call appearances- TLS and SRTP security encryption technology to protect calls and accounts- 3-way audio conferencing for easy conference calls- Electronic Hook Switch (EHS) support for Plantronics headsets- Automated provisioning options include TR-069 and XML config files- Full-duplex speakerphone with HD audio to maximize audio quality and clarity- Use with Grandstreams UCM series of IP PBXs for Zero Config provisioning- Built-in PoE 802.3af to power the device and give it a netw