2rj45 voip phone GF502

Anti Block 2.5mm plug headset Support SIP,mgcp protocol Support 4 sip accounts at the same time Support multi lines conference Support Qos,Tos Support DND(Do not destrub) Dhcp server and address pool Auto-provision firmware and configuration via HTTP server Message Waiting LED and Button Large dot-matrix LCD with back light Support Call Wait,Call Hold, Call Transfer and conference Audio codec G.711,G.723,G.729,G.726 etc Set phone by HTTP web browser or Keypad DHCP support for LAN or Cable modem VAD(Voice active detect) CNG (Comfort noise generation) G.168/165 compliant 16ms echo cancellation Dynamic voice jitter buffer Full anti block,advanced encryption technology