1.CP-6921-C-K9= 2.VoIP phone - SCCP, SIP - 2 lines - charcoal 3.LCD display 4.Original & brand new ... support, integrated Ethernet switch,Power over Ethernet (PoE) support VoIP Protocols: SCCP, SIP Voice Codecs: G.729a, G.729ab, G.711u, G.711a ... Lines Supported: 2 lines Quality of Service: IEEE 802.1Q (VLAN), IEEE 802.1p Network Protocols:TFTP, Cisco Discovery Protocol (CDP ...