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