VoIP Features
 Support SIP 2.0 and correlative RFCs
 Codec: G.711A/u, G.7231 high/low?G.729
 Echo cancellation: Support G.168
 Voice control : Voice Gain Setting, VAD, CNG
 NAT transverse: support STUN client
 SIP support SIP domain,
 SIP authentication (none, asic, MD5), DNS name of server, Peer to Peer
 SIP support Pubic/ Private server. Can connect to
 Public SIP server and Private SIP server at the same ime
 DTMF: Support SIP info, DTMF Relay, RFC 2833
 SIP application: support Call forward
 Call control features: Flexible dial map, Hotline Empty
 calling No. reject service, Black list ,out-limit? No
 disturb/ Caller ID, IP address Peer to Peer call
 Support IAX2 Support PSTN call with PSTN line
 Default line to call: voip/ PSTN?optional