FV8020 is a kind of voice communication terminal which is based on wide band and independent of PC (personal computer). Voice Features *Support H323v4 and SIP synchronously (RFC3261, RFC3262, RFC3265) *Codec: G.711A/u, G.7231 high/low, G.729 *Support Voice Gain Setting, Jitter Buffer,VAD,CNG, H323 support dual GK, call forward,and Peer to Peer. *NAT transverse:support STUN client, Citron, AVS *SIP support SIP domain,SIP authentication (none,basic, MD5),DNS name of server, Peer to Peer *SIP support pubic/Private server. Can connect to ISP and Private SIP server at same time *SIP support dual public server *DTMF: Support SIP info,DTMF Relay,RFC2833 *SIP application: support Call forward/transfer/holding/waiting *Call control features: Flexible dial map, support Hotline, Empty calling No. reject service, Black list for reject authenticated call, No disturb, Caller ID. *Support T.38 Fax *No need dial again with one lifeline *Support conference and three party service Network Features *WAN/LAN: Support Bridge and Router model. *Support basic NAT and NAPT. *Support PPPoE for xDSL. *Support DHCP Client on WAN *Support DHCP Server on LAN *Support DNS Relay, SNTP Client, Firewall *Network tools in telnet server: Including ping, trace route, telnet client Maintenance and Management *Support Boot Monitor *Can upgrade firmware through boot monitor *Can config through Web, keypad, Telnet *Can upgrade firmware and configuration file through HTTP, FTP, TFTP *Support Syslog