Make/Receive both VoIP and PSTN calls.

Auto-detection and auto-switch to VoIP or PSTN calls .

Support 3 user accounts.

Phone rings for all incoming VoIP and PSTN calls.

VoIP or PSTN calls selected by phone key.

Support Caller ID/Name display or block.

Support call hold, call waiting, call forwarding, call transfer and IVR.

Dial plans, dial tone, busy tone, ring back tone, alert tone can be set flexibly.

Network Features:

Support SIP 2.0 (RFC3261) protocol.

Support NAT transverse: STUN mode.

IP Assignment: Static IP/ DHCP/ PPPoE

Auto-provision and upgrade via TFTP, FTP and HTTP.

Support in-band and out-of-band DTMF transfer.