Line Keys – 2 line keys with dual-color LED. Ethernet Connectivity – Dual switched auto-sensing 10/100 Mbps Ethernet ports, with integrated PoE. Display Type – 132 x 48 LCD display. Headset Support – RJ9 headset jack (allowing EHS with Plantronics headsets). Protocols – SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS and more. QoS – Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS. Warranty – 1 Year.