1. Support all VoIP communication protocols such as H. 323, MGCP, SIP, IAX2, WP, Net2phone and so on.
2. Support audio codec G. 711, G. 723, G. 729, G. 731
3. DHCP support for LAN or Cable modem
4. PPPoE support for ADSL or Cable modem
5. Set phone by HTTP web browser (IE6. 0) or Telnet
6. Upgrade by FTP
7. VAD(Voice active detect)
8. CNG (Comfort noise generation)
9. Dynamic voice jitter buffer
10. G. 168/165 compliant 16ms echo cancellation
11. Tone generation and Local DTMF re-generation according with ITU-T
12. E. 164 dial plan and customized dial rules
13. 100 entries for quick dial
14. 80 entries each for missed calls, answered calls and dialed calls
15 Adjustable volume for both handset and speaker