- Support 2.0 (RFC3261) and correlative RFCs- Support IAX2- Support 2 SIP lines- Codec:G.711A/u, G.723.1 high/low,G.729 a/b, G.722.1,G.726- Support HD voice- Soft keys programmable- Hard function key reprogrammable- 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 BLF- Two 10/100 BaseT Ethernet Interface- 128*48 FSTN graphic LCD- Support Multi-line- Support IAX2 line key- Support Open VPN and L2TP- 4 DSS keys- PoE(optional)- TR-069(optional) BRAND : ITT
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