Sell Professional VOIP Phone (China (Mainland))

IP Call Features -CNG(Comfort Noise Generation) -DIGEST authentication and encryption using MD5and MD5-sess -Configurable via keypad or web interface -NAT-friendly remote software upgrade capability(Viatftp) even from behind firewalls/NATS -Support for redundant DNS servers -Support STUN servers User interface -Backlit LCD display -3line display-iCo.,1 line dot matrix(14characters) -26 keys -50 caller ID memories(14 characters&32 digits Max) -100 phonebook memories(14 characters&32 digits Max) -2one touch memories -Short cut key for the caller list&Phonebook searching as Nokia mobile phone -20 last number redial -3 ring melodies(1common ring and 2 polyphonic ring) -4 levels LCD contrast -Multi languages LCD menu -Digital volume control-speaker/Handset/Ringer -Name matching -On screen dialing -Auto On-Line update for clock and date -Selectable Flash time(100ms300ms,600ms) -Toggle Mute -New, speaker icon -Line in use LED indicator -Prefix IP dialing -Memories full indicator -Prefix IP dialing -Memories full indicator User name display Support Codec -G711(a-lawu-law), GSM -Dynamic negotiation of codec and voice payload length -In band and out of band DTMF Support protocols -H.323&SIP Connectors * Ethernet WAN port(RJ-45)* Ethernet PC/LAN port(RJ-45)