| VoIP Protocols: SIP V2, H.323 V4 |
| Audio Codecs: g711(alaw/ulaw), g729, g723.1 |
| DTMF format: SIP INFO, RFC2833, Inband |
| Packet Loss Concealment |
| Programmable Jitter Buffer: Fixed, Dynamic, Adaptive |
| Network Connection: DHCP, PPPOE, Static IP |
| STUN Server |
| Support English, Chinese |
| Support Signaling encryption |
| Support media encryption |
| Support Media NAT Traversal |
| Support Remote control |