SH-VP812VoIP is a kind of voice communication terminal which is based on wide band and independent of PC (personal computer). Voice Features * Support SIP RFC3261 RFC3262 RFC3265 * Codec：G.711A/u, G.7231 high/low, G.729 * Echo cancellation: Support G.168, and Hands-free can support 96ms * Full duplex hands-free speakerphone * Support Voice Gain Setting, Jitter Buffer, VAD, CNG * NAT transverse：support STUN client * SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer * Public SIP support Pubic & Private server. Can connect to ISP and Private SIP server at the same time * Public 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 conference call and voice record * English, Spanish, Czechoslovak alternative 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