vi2003

2 SIP Lines + 1 IAX2 Line Asterisk, 3CX Compatible VoIP Phone 2 RJ 45 Ports Support VLAN,VPN (L2TP/UDP) LCD Display Support Protocol SIP (RFC3261, RFC2543) Support IAX2 protocol Support codec: G.711A/u, G.722,G.723 high/low, G.729 A/B Support G.168 echo cancellation standard, compliant 96ms echo cancellation Support voice volume adjustment, including IN/OUT of handset and speaker Support Jitter ...