... ID, call waiting, hold, transfer, for-ward, 1) SIP 2.0, TCP/IP/UDP, RTP/RTCP, ... NTP. 2)Dual 10/100mbps Ethernet ports, 2 USB (2.0) host ports, 2.5mm headset jack ... -time video codec with video band-width from 32kbps – 1Mbps. 5)5.6in TFT color LCD, 180 degrees vertical ... 7)Multi-line support, multi-party conferencing, headset enabled, intercom, AES encryption. 300 degree voip video phone with USB port