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The ESI 48 Key IPFP is an IP phone designed for use with IP enabled ESI Communications phone systems
twelve of which are programmable CO keys and the other twelve are programmable feature keys
Polycom VVX 311 IP Phone (2200-48350-025) Power:Add Power Supply and conferencingPolycom VVX 311 Gigabit Phone Description: The Polycom VVX 311 is an upgraded model of the VVX 310 including upgraded firmware and features. The Polycom VVX 311 (2200 48350 025) supports six lines and has an integrated 10 100 1000 Mbps Ethernet switch, 7KHz HD voice, PoE capabilities, a speakerphone, headset port, and so much more. The Polycom VVX 311 can be powered via Power over Ethernet or an external power supply or power injector. Polycom 2200
