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1. Supports log three SIP servers at the same time
2. Supports NAT, Firewall
3. Supports DHCP dynamic IP address and static IP address configuration
4. Supports PPPoE protocol
5. Can be configured by Http or Ftp
6. Supports G.7XX voice coding arithmetic
7. Dynamic voice examination; CNG (Comfort Noise Generation); Dynamic voice buffer
technology
8. Accords with G.168 Echo cancellation, max. 16ms, comparative tone like ordinary phones
9. Accords with ITU-T signaling voice and DTMF creation and check
10. Supports coding dialing regular based on E.164
11. Supports DTMF, such as audio, RFC2833 and SIP info
12. Supports call one another between two FXS and PSTN port
13. Supports dial quickly, flash broken, volume adjust and phonebook
14. Call holding, call waiting, call forwarding, 3-way calling
15. Call ID display
16. Supports web browsers, consoles/telnet and voice notification/keyboard setting
17. Normal user and super user cryptogram classification management
18. Vo