Performance and features
    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
    Major G.7XX and gsm610 audio codec
    Caller ID send and receive by Q.931
    Provide direct IP address to IP address call mode, direct PSTN call by a voice gatewayE.164 phone number call under the mode of GK
    Automatically gatekeeper discovery in LAN
    Call PSTN by ITSP's prepaid card (eTalk,italk,ringtec etc)
    DHCP support for automatically assign IP address and others relevant parameters
    PPPoE support for ADSL or Cable modem
    Setting IP Net Phone parameters by standard web browser (such as IE6.0), phone keypad or standard telnet
    Upgrade program by FTP mode
    Support G.723.1 5.3k/6.3k,G.729,G.711 A-Law\μ-Law audio codec algorithm
    Dynamic voice detection Echo cancellation Comfort noise generation
    Dynamic voice jitter buffer which minimize effect to the voice caused by the audio delay and jitter and as a result the quality of voice is high
    Tone generation and Local DTMF generation and detection according with ITU-T
    E.164 dial plan and customized dial rules
    40 entries each for missed call, answered call and dialed call
    112 entries for quick dial
    16 entries for voice message
    LCD display dial data\caller name \caller number and so on
    Working status indicating Lamps(red\yellow and green) and keypad jacklight
    Independently digit adjust the volume of handset \hand free
    14 function keys for operating and setting phone besides standard keys 0-9,#
    Speed dialing
    Adjustable volume for both handset and speaker
    16 function keys, background LED and states indicating lights
    Settings by HTTP web browser (IE6.0)
    Advanced settings by Telnet
    Voice prompt
    Upgrade by TFTP