Performance and features
    Support SIP,IAX2,H323 protocol
    Support two sip accounts at the same time.
    Redundancies server support.
    NAT, Firewall.
    DHCP client and server.
    Support PPPoE, (used for ADSL, cable modem connecting).
    Support major G7.xxx CODEC. VAD,CNG.
    G.711 u/a; G729, G7231 5.3/6.3 audio Codec
    G.168 compliant 32ms echo cancellation
    Tone generation and Local DTMF re-generation according with ITU-T
    E.164 dial plan and customi ed dial rules
    Hotline.
    Speed Dial
    Call Forward, Call Transfer, 3-way conference calls
    Record
    Caller ID display
    DND(Do Not Disturb),Black List,Limit List
    Upgrade firmware through FTP, TFTP or HTTP,.
    Web management.
    Telnet remote management.
    adjustable user password and super password
    IEEE 802.3 /802.3 u 10 Base T / 100Base TX
• Main technical index
    Main chip: 150MHZ
    DSP: 100MHZ
    Data storage: 16MB SDRAM
    Program memory: 2MB Flash memory
    Application Network environment: 10 Base-T/100 Base-T
    Echo cancellation:G165 16ms
    Power loss: 2.7 W (max)
    Power adapter: input AC 220V,output DC 9V 500mA
    Employing condition:
    Ambience temperature 0-40??32-104°F?
    Relative humidity 10-95%
    Atmosphere pressure 86-106Kpa
    Overall size:215×190×70mm(L×W×H)