The KT-989 Voip gaterway  is a next generation IP network facility based on industry open standard SIP (Session Initiation Protocol). Built on innovative technology, VOIP Gateway features market leading superb sound quality and rich functionalities.It can use the same SIP account for 2FXS port but at that time only one of the port can be used as callee however both port can be used as caller simultaneously but when they used the different SIP account it can be used as caller or callee anytime.For the lifeline port the default is 1FXS port to be used as PSTN phone when power off.You can select any FXS port to be switched to PSTN as caller through lifeline port by dial different dial prefix.

Features

• Support two models: Bridge and Router(NAT&NAPT).
• Network Protocols: TCP/UDP/IP, ICMP, HTTP, DHCP Client     (WAN Interface), DHCP Server(LAN Interface), DNS Client, DNS Relay, SNTP, PPPoE, FTP, TFTP.
• VoIP Protocols: SIP (RFC3261, RFC3262, RFC3264, RFC3265) synchronously.
• Voice Codecs: G.711(A-law/U-law), G.723.1, G.729A/B, G.726
• NAT penetration: Support STUN client, AVS and Citron etc. Can modify SIP register port, HTTP server port, Telnet server port and RTP port.
• Support standard voice features such as numeric Caller ID Display, Call Waiting, Hold, Transfer, Do-Not-disturb, Forward, in-band and out-of-band DTMF, Hotline (off hook autodial), ban outgoing.
• Support standard encryption and authentication (DIGEST using MD5, MD5-sess).
• Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control).
  Provide easy configuration thru manual operation (Web interface and Telnet) or automated centralized configuration file via TFTP or HTTP.
• Support firmware upgrade via TFTP/FTP and HTTP.
• Support syslog, can send event of gateway to syslog server.
• Support VPN (base on L2TP) T.38Fax.And It support NATDHCPfirewall ,can be used as a simple route

VOIP PHONE Specifications

Port WAN                                       1  10/100Base T  RJ-45 for LAN
Port LAN                                         3  10/100Base T  RJ-45 for PC  
Port FXS                                         2  RJ11 for phone and FAX 
Port Life line                                    1  life line      
Adapter (Input/output/frequency)       100-240VA/12VDC/60Hz/1A  
Power  Consumption                         2.8W-4.8W
Protocol                                           SIP
SDRAM                                           128Mbits  
Flash                                               16Mbits       
Echo cancellation                             G165 16ms    
Operating Temperature                      0-50%                    
Relative Humidity                            -15-65%          
Dimensions                                     114x154x34mm (L x W x H)