- Support SIP 2.0 (RFC3261) - 2 SIP line (1 SIP Key) - Segment LCD display - Codec:G.711A/u, G.723.1 high/low,G.729 a/b, G.722.1,G.726 - Support HD voice (HD handset and Speaker) - 4 DSS keys - Two 10/100 BaseT Ethernet Interface - SIP application:support call forward/transfer(blind/attended)/holding/waiting/3 way talking/conference/pickup/join call/redial and unredial/ click to dial/secondary dialing automatically - Support SRTP - Support Bridge mode in LAN - Support Multi-line