Performance and features
    Support H.323
    Support MGCP RFC2705
    Support SIP RFC3261
    Support IAX2
    Support Net2phone private protocol
    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
    DHCP support , PPPoE support for ADSL or Cable modem
    Setting IP Net Phone parameters by standard web browser, 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
    Settings by HTTP web browser (IE6.0)
    Advanced settings by Telnet
    Voice prompt
    Upgrade by TFTP 
• Main technical index
    Main chip: 50Mhz
    Data storage:2MB SDRAM
    Program memory: 1MB Flash memory
    Application Network environment: 10Base-T/100Base-T
    Echo cancellation:G165 16ms
    Store quick dial number: 100
    Record phone number of missed call:80
    Power loss:2.7W(max)
    Power adapter: input AC 220V,output DC 9V 500mA
    Employing condition:
    Ambience temperature 0-40?
    Relative humidity 10-95%
    Atmosphere pressure 86-106Kpa
    Overall size:215×190×70mm(L×W×H)