VOIP Gateway with 1 FXS and 1PSTN

key Features

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

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

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

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

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

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

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

8.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

9.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

 Hardware Specification

The table below describes the hardware specification

voip gateway