VOIP (Voip internet phone)

Function Feature:
Support Voice Recorder;
Support Caller ID display or block, per call or permanent;
Call waiting, hold, Mute, Transfer,Forward;
Multi-party conferencing;
Integrated Power -over -Ether(802.3af and Cisco style)
Many more enterprise grade features.
Hardware:
Size:105*65*6mm
WAN interface: 1 RJ-45 Ethernet ports
LAN interface:1 RJ-45 Ethernet ports
Power adaptor: Universal Switching power adaptor
Indication: 1 LAN Status LED, 1 Call status LED.
System feature:
Support SIP(RFC3261)
TCP/IP/UDP,RTP/RTCP,HTTP,ARP,ICMP,DNS
Support NAT traversal (STUN),server fail-over, SIP presence;
Support firmware upgrade Via TFTP,FTP and HTTP.