Physical locations support the Device Mobility feature. Physical locations provide a means of distinguishing the parameters that relate to a specific geographical location from other parameters. For example, a media resources server may serve a specific office or campus within the enterprise. When a device roams to another office or campus and reregisters with Cisco Unified Communications Manager, you want to have the media resources server at the roaming location serve the device. By defining the physical location according to availability of media services, you can assure efficient and cost-effective reassignment of services as devices move from one physical location to another. Depending upon the network structure and allocation of services, you may define physical locations based upon a city, enterprise campus, or building.
Refer to Device Mobility in the Cisco Unified Communications Manager Features and Services Guide for more information on the device mobility feature.