Features:

01)Support SIP/IAX2

02)call hold

03)call waiting and per call-waiting blocking

04)call forward (Always, busy, no answer, power off)

05)voip speed dial

06)VoIP digital map

07)E.164 dial plan and customize dial rules

08)caller number/name display

09)voice promote

10)configurable jitter buffer size

11)configurable audio frame

12)Support T.38 Fax model

13)Life-Line function

14)Support Bridge and Router model

15)data features

16)Static/Dynamic WAN-IP-Addressingatures

Specifications:

01.Support two models: Bridge and Router(NAT&NAPT)

02.Network Protocols: TCP/UDP/IP, ICMP, HTTP, DHCP Client(WAN Interface), DHCP Server(LAN Interface), DNS Client, DNS Relay, SNTP, PPPoE, FTP, TFTP

03.VoIP Protocols: SIP (RFC2976,RFC3261, RFC3262, RFC3264, RFC3265,RFC3515,RFC3581)

04.Voice Codecs: G.711(A-law/U-law, G.729A/B, G.726

05.Redundancy SIP server (or Gate Keeper): Can auto swap address between two servers address

06.NAT transversal: Support STUN client. Can modify SIP register port, HTTP server port, Telnet server port and RTP port

07.Support two SIP server synchronously: Can register two different SIP server, and can make a call by either proxy

08.Support standard voice features such as numeric Caller ID Display, Call Waiting, Hold, Transfer, Do-Not-disturb, Call Forward, in-band and out-of-band DTMF, Hotline (off hook autodial), ban outgoing

09.Support standard encryption and authentication (DIGEST using MD5, MD5-sess)

10.Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control

11.Provide easy configuration thru manual operation (Web interface or Telnet) or automated centralized configuration file via TFTP or HTTP.

12.Support firmware upgrade via TFTP/FTP and HTTP