Grandstream GXP-2000 is a next generation enterprise IP telephone based on open industry standards. Built on innovative technologies, GXP-2000 features market leading superb audio quality, rich functionalities, and excellent manageability at affordable prices.
-Support SIP (RFC3261), TCP/IP/UDP, RTP/RTCP, HTTP, ARP, ICMP, DNS (A record and SRV), DHCP, PPPoE, TFTP, NTP .
-Support NAT traversal (STUN, etc), server fail-over, SIP presence (SIMPLE), and more.
-Multiline support of up to 11 lines indicators (expandable to a few dozen more through expansion key-module).
-Graphical LCD to display up to 8 lines and 22 characters per line.
-Dual 10/100Mbps Ethernet ports.
-Support Caller ID display or block, per call or permanent.
-Call waiting, Hold, Mute, Transfer (blind or attended), Forward, and more.
-Integrated Power-over-Ether (802.3af and Cisco style).
And many more enterprise grade features!