1. IEEE 802.3 10 Base T
2. SIP protocal
3. Support G.711A/U,G.723.1,G.729 /A/B/AB and GSM610 codec
4. Support DHCP,PPPOE DNS TELNET; HTTP,TFTP,FTP upgrade
5. Sopport TCP/IP, RTP RTCP, VAD/CNG
6. Support Bridge and Router model
7. One WAN, one LAN, support router ; 1 FXO,1FXS port