Features：

1. Protocol support: SIP (RFC2543, ARFC3261) ，SIP2.0

2.64 groups incoming calls memory displayed stored

3.64 groups outgoing calls memory reviewed stored

4. Phone Book with 100 groups memory

5. Hand-free dialing funtion, calculate conversation time automatically

6. Outgoing calls memory reviewed deleted redialed

7. Refused to answer call function

8. Roaming function

9. Local number check

10. Pre-dial function

11. Date and time display

12. Music hold function

13. PPPOE port: Point t o Point of ethemet

14. IP address dynamic and static dual system compatible

15. Support voice code format G.711A/U G.723.1 .729A/B auto selection, VAD/CNG save band-width

16. Anti-parallel function

17. Support protocol TCP/IP (ARP/RARP BIP/ICMP UDP/TCP/IP BRTP/RTCP)

18. Support TFTP and Console function

19. IEEE 802.IP /802. IQ/ToS U 110 Base T / 100BaseTX

20. Support Domain Name (DNS)

21. Transfer calls function

22. Three -way conversation

23. Call waiting function

24. Call transferring function

25. DDNS function

26. Remote software updates/upgrades