Support 5 navigation/menu/volume keys, 13 dedicated function keys for: HOLD, SPEAKERPHONE, SEND/REDIAL, MUTE, TRANSFER,CONFERENCE, and MESSAGE(with message indicator),LINE1,LINE2,DND,INTERCOM,PHONE BOOK,PICK UP.
Support SIP 2.0 (RFC 3261), TCP/UDP/IP, RTP/RTCP, ICMP,ARP/RARP, DNS, DHCP, NTP, PPPoE, STUN, UPNP, etc
2 line appearances with LED and 2 independent SIP accounts
80*39mm LCD with blacklight,support 4 lines with 16 characters every...