An economical IP Phone, is suitable for home and office use, provides you with high Voice quality and professional after sale service. It Supports 2 SIP and 1 IAX2 lines, also with some business functions such as call hold, call transfer, 3 way call and call record, etc. Features Support SIP RFC3261 Codec: G. 711A/u, G. 7231 high/low, G. 729 Echo cancellation: Support G. 168, and Hands-free can support 96ms, Hand free Speaker Phone Support Voice Gain Setting, Jitter Buffer, VAD, CNG, , call forward, and IP address Peer to Peer Call NAT transverse: Support STUN client 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 the same time SIP support dual public server DTMF: Support SIP info, DTMF Relay, RFC2833 SIP application: Support Call forward/transfer/holding/waiting / Speed Dialing Call control features: Flexible dial map, Hotline, Empty calling No. Reject service, Black list for reject authenticated call, limit call, No disturb, Caller ID. Support three way conference call and voice record Support Phonebook 100 record Incoming calls / Outgoing calls / Missing calls, Each support 100 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, race route, telnet client