Technical specs

VoIP Specs:

        Support SIP V2.0 and correlative RFCs

     SIP supports 2 SIP servers, pubic and private server. Can connect to public SIP server and private SIP server at the same time

     Codec:  G.711u/aLaw, G.729a/b, G.726

     G.168 Echo Cancellation

     Support Voice Gain Setting, VAD, CNG

     NAT transverse: support STUN client

     SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer/IP call

     Support choose line automatically, using private server to dial automatically when public server disconnected

     DTMF Method:  SIP INFO, RFC2833 DTMF relay, In-band

     Call features: Call transfer, Call forward, Call waiting, Call hold, Conference, flexible dial map, hotline, empty calling No. reject service, black list for reject authenticated call, limit call, no disturb, caller ID

      T.38 Fax Relay

Networking:

     WAN/LAN support Router or Bridge mode

     PPPoE,  VLAN

     DHCP server/Client

    Support IGMP Proxy/IGMP Snooping

    Support ping test with keypad-command