IP voice gateway

KNXS-32 Technical Specification

Voice features
       Support FXS Port: 32 Extension Number
       Support SIP 2.0　(RFC3261) and SIP related rfc
       Voice code: G.711A/u, G.7231 high/low, G.729
       Echo cancellation: support G.168 standard，reach to cancellation for 128ms
       long-line transmission: Support telephone line for 10KM
       Support VAD, CNG
       SIP supports SIP domain，SIP certificate（none，basic, MD5), DNS, point to point（DIALPEER setting and IP inputting）calling
       SIP support registered 32 account in the same time;Support could make calling via any account;
       Support DTFM mode: SIP info, RFC2833
       Support Fax :T.38、VBD、BYPASS
       Support SIP application, including before the call (unconditional transfer/no answer transfer/user busy transfer), call transfer (blind turn/ask), after three calls, call hold, call waiting, call a hotline number, quickly abbreviated dial, number              replace rules, restrictions, call, don't disturb, caller id, outside threats ringing, outside threats ring, etc

Network features
     Support xDSL PPPoE and redial when out off line.
     Support VLAN（DATA VLAN and VOICE VLAN）
     WAN support DNS server function, support in DHCP mode, set dynamic DNS or static DNS address
     WAN support DHCP Client
     Support DNS Relay，SNTP Client，firewall
     Qos support TOS、DSCP

Management and maintenance

     Support serial interface mode and can be program updates via a serial port mode
     Suppor configure via website , telnet and serial port
     Support upgrade and configure the files wia HTTP and FTP