... 7911G, for Channels, with one station user licenseNote: All Cisco Unified IP phones require the purchase of a phone ... Protocol SupportSupported in Cisco Unified CallManager Versions 3.3(5)SR2, 4.1(3)SR3a, 4.2(1)SR1 ... Session Initiation Protocol (SIP) with Cisco Unified CallManager Version 5.0(2) and higherCodec SupportG.711a, G.711, G ... (TFTP) serverDimensions (H x W x D)6.5 x 7 x 6 in. (20.3 x 17.67 x 15 ...