Support H.323 v4,compatible with most H.323 v1-v4 system and devices
    Built in H.323 proxy support to pass NAT
    Support MGCP RFC2705
    Support SIP RFC3261
    Support IAX2
    Support Net2phone private protocol
    Fast start and H.245 tunneling
    Outband DTMF transmit by H.245 user input or Q.931 keypad
    IEEE 802.3 /802.3 u 10 Base T / 100Base TX