VOIP terminal telephones 400 support voice gain setting, VAD, CNG Full duplex hands-free speakerphone NAT transverse suppor

    VOIP terminal  telephones 400 

Support SIP 2.0 (RFC3261) and correlative RFCs Codec: G.711 A/U Law, G.722, G.723, G.729 Echo cancellation: Support G.168, and hands-free can support 96ms, hands free speaker phone support voice gain setting, VAD, CNG Full duplex hands-free speakerphone NAT transverse support STUN client SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, peer to Peer/IP call SIP support 2 SIP lines Can connect to SIP1 and SIP2 server at the same time DTMF: Support SIP info, DTMF Relay, RFC2833 SIP application: support call forward/transfer/holding/waiting/3 way talking/ paging and intercom/pickup/join/call/click to dial/call park Call control features: flexible dial map, hotline, empty calling reject, black list for reject authenticated call, limit call No disturb, caller ID Support phonebook 500 records Incoming calls/outgoing calls/missing calls Each support 100 records Support conference and voice record on SIP server 10 kind of ring type Support IAX2 Support SRTP

VOIP terminal telephones 400