... 1.CP-6921-C-K9= 2.VoIP phone - SCCP, SIP - 2 lines - charcoal 3.LCD display 4.Original & ... switch,Power over Ethernet (PoE) support VoIP Protocols: SCCP, SIP Voice Codecs: G.729a, G.729ab, G.711u, G ... 802.1Q (VLAN), IEEE 802.1p Network Protocols:TFTP, Cisco Discovery Protocol (CDP) Network Ports Qty:2 x Ethernet ... in Height: 6.5 in Weight: 2.2 lbs Cisco Unified IP Phone 6921 Standard - VoIP phone CP-6921 ...