yuxin IP phone and gateway is a Business Services product. Key specs — Origin: China (Mainland).
Product Description
Performance and features
nbsp; SIP v1 (RFC2543), v2(RFC3261)
nbsp; Support Route,Two 10/100Mbps MACs
nbsp; Support T.38(Doing)
nbsp; IP/TCP/UDP/RTP/RTCP
nbsp; IP/ICMP/ARP/RARP/SNTP
nbsp; TFTP Client/DHCP Client/ PPPoE Client
nbsp; Telnet/Server
nbsp; DNS Client
nbsp; NAT/DHCP Server
nbsp; Support G.723.1 5.3k/6.3k,G.729,G.711 A-Law,μ-Law audio codec algorithm
nbsp; Dynamic voice detection Echo cancellation Comfort noise generation
nbsp; Tone generation and Local DTMF generation and detection according with ITU-T
nbsp; Settings by web browser (IE6.0)
nbsp; Advanced settings by Telnet
nbsp; Voice prompt
nbsp; Upgrade by TFTP 
nbsp; 2RJ45 Ports,Built-in Router,conference.Auto-provision or updating by ,FTP or TFTP.
nbsp; For each YWH600A,It can be register 3-SIP account,all can used as callee at also can be slected among these 3-SIP account as caller by dial different dial prefix.
nbsp; For each YWH600B,it can have 3-SIP account and one PSTN phone number,that means each phone own 4 phone numbers,all can be used as callee at the caller,these 4 account can be selected by dial different relevant prefix(including switch to PSTN as an ordinary PSTN phone)
nbsp; YWH600B has a real FXO port to support router call from PSTN to VOIP or VOIP to PSTN.
