Dual RJ45 IP Phone With LCD & Router

1) Support two models: Bridge and Router (NAT&NAPT);2) Network Protocols: TCP/UDP/IP, ICMP, HTTP, DHCP Client (WAN 3). Interface), DHCP Server(LAN Interface), DNS Client, DNS Relay, SNTP, PPPoE, FTP, TFTP;4) VOIP Protocols: Support H323 (V4)&SIP (RFC3261, RFC3262, RFC3264, RFC3265) synchronously;5) Voice Codecs: G.711(A-law/U-law), G.723.1, G.729A/B, G.726, and G.722;6) Redundancy SIP server (or Gate Keeper): Can auto swap address between two servers address;7) NAT transversal: Support STUN client, AVS and Citron etc. Can modify SIP register port, HTTP server port, Telnet server port and RTP port;8) Support two SIP server synchronously: Can register two different SIP server, and can make a call by either proxy;9) 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), auto answer, ban outgoing;10) Full duplex hands-free speakerphone, redial, call log, volume control, voice record with indicator;11) Support standard encryption and authentication (DIGEST using MD5, MD5-sess);12) Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control);13) Provide easy configuration thru manual operation (phone keypad, Web interface and Telnet) or automated centralized configuration file via TFTP or HTTP.14) Support firmware upgrade via TFTP/FTP and HTTP;15) Support syslog, can send event of phone to syslog server.