1. Supported protocols: SIP(RFC2543, RFC3261), TCP/UDP/IP, PPPoE, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP(Server/Client), NTP/SNTP, TFTP/FTP
2. Two 10/100M Ethernet ports, support NAT and Bridge mode
3. Voice codecs: G. 711a/u, G. 723.1, G. 729A/B, G. 726
4. Voice quality enhancement: QoS, VAD, CNG, Adaptive Jitter Buffer, G. 165 16ms Echo Cancellation
5. Support 3 SIP accounts
6. NAT traversal: STUN, Outbound proxy
7. Auto configuration and upgrade via TFTP, FTP, HTTP; Manual configuration via keypad, webpage, and Telnet
8. Extensive phone features: Caller ID, Call Waiting, Music on Hold, Call Transfer (attended/blind), Do-Not-Disturb, Call Forwarding, Dial Plans, Speed Dial, 3-Way Calling, Phonebook, Call Log, Hands-free, Call timer, Send Anonymous CID, etc.
9. User authentication
10. Signaling tone of ITU-T standard, DTMF detection and generation
11. Support T. 38 fax, VLAN, DMZ, DDNS, Mac Clone, Virtual Server, SIP Encrypt
12. Approval/Certification: FCC, CE
2. Two 10/100M Ethernet ports, support NAT and Bridge mode
3. Voice codecs: G. 711a/u, G. 723.1, G. 729A/B, G. 726
4. Voice quality enhancement: QoS, VAD, CNG, Adaptive Jitter Buffer, G. 165 16ms Echo Cancellation
5. Support 3 SIP accounts
6. NAT traversal: STUN, Outbound proxy
7. Auto configuration and upgrade via TFTP, FTP, HTTP; Manual configuration via keypad, webpage, and Telnet
8. Extensive phone features: Caller ID, Call Waiting, Music on Hold, Call Transfer (attended/blind), Do-Not-Disturb, Call Forwarding, Dial Plans, Speed Dial, 3-Way Calling, Phonebook, Call Log, Hands-free, Call timer, Send Anonymous CID, etc.
9. User authentication
10. Signaling tone of ITU-T standard, DTMF detection and generation
11. Support T. 38 fax, VLAN, DMZ, DDNS, Mac Clone, Virtual Server, SIP Encrypt
12. Approval/Certification: FCC, CE
