Voice features
SIP supports 4 SIP servers
Support SIP 2.0 (RFC3261) and correlative RFCs
Codec: G.711A/u, G.723, G.729, G.722.1, G.726-32
Echo cancellation: G.168 Compliance in LEC, additional acoustic echo
cancellation(AEC) can reach 96ms max filter length in hands-free mode
Support Voice Gain Setting, VAD, CNG
Support full duplex hands-free
Support multi line/HD Voice
SIP support SIP domain, SIP authentication(none basic, MD5), DNS name
of server, Peer to Peer/ IP call