1. IEEE 802.3 10 Base T/100Base TX
2. Support SIP protocal ,Big LCD Screen
3. Support G.711A/U,G.723.1,G.729 /A/B/AB codec
4. Support DHCP,PPPOE DNS TELNET; HTTP,TFTP,FTP upgrade
5. Support TCP/IP, RTP RTCP, VAD/CNG
6. G.165 16ms echo cancellation
7. DTMF tone detection and generation
8.  E.164 dial plan and customize dial rules