(1) automatically IP and gateway discovery;
(2) 10M Ethernet interface supports LAN/ADSL/Cable Modem;
(3) compatible with most IP audio system and devices;
(4) Dynamic voice jitter buffer which minimize effect to the voice caused by the audio delay and jitter as a result the quality of voice is high;
(5) 112 entries for quick dial;
(6) 40 entries each for missed call, answered call and dialed call;
(7) 16 entries for voice message;
(8) set by keystroke;
(9) provide direct IP address to IP address call mode;
(10) direct PSTN call by a voice gateway;
(11) support config by Telnet/ Web browser;
(12) build-in H323 proxy supports to pass NAT;
(13) upgrade firmware by TFTP;
(14) display caller ID;
(15) support H323,SIP and MGCP;
(16) 110/240v auto sense for power;
(17) a build-in switch(differnet from sigle-port);
(18) dimension: 225mm(L) x 225mm(W) x 95mm(H).