| http://www.w3.org/ns/prov#value | - Operably connected to the subnet 110 are a plurality of network devices including one or more VoIP communication devices 102, an IP PBX 104, and a switching device such as a bridge or router adapted to perform layer 2 and/or layer 3 switching operations as defined in the OSI network model. [0019] The VoIP device in the preferred embodiment is an IP phone that operates in cooperation with the IP PB
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