• Make/Receive both VoIP calls and regular PSTN calls
• Auto-detection and auto-switch to VoIP or PSTN calls
• Phone rings for all incoming VoIP and PSTN calls
• VoIP or PSTN calls selected by phone key (**)
• Supports SIP 2.0(RFC 3261), PPPoE, STUN, DHCP(both client
and server) etc.
• Built-in router, NAT, gateway, LAN pass and DMZ port
• Support various voice codec including G.711U, G.711A,
• Support Caller ID/Name display or block.
• Support call hold, call waiting, call forwarding, and
• Support in-band and out-of-band DTMF transfer.
• Dial plans, dial tone ,busy tone, ring back tone, alert
tone can be set flexible.
• Support silence suppression, VAD, CNG, line echo
cancellation (G.168), AGC, and QoS.
• Support standard encryption and authentication (DIGEST
using MD5 and MD5-sess).
• Support automated NAT traversal without manual
manipulation of firewall/NAT.
• Support firmware upgrade via TFTP, FTP and HTTP.