/mcp• SRST Reference • Connection Monitor Duration • Physical Location • Device Mobility Group • Media Resource Group List When networks span geographic locations outside the United States, you can configure device mobility groups to allow phone users to use their configured dial plan no matter where they roam. When a device is roaming but remains in the same device mobility group, Cisco Unified Communications Manager also overwrites the following device pool parameters: • AAR Group • AAR Calling Search Space • Device Calling Search Space When the phone returns to its home location, the system disassociates the roaming device pool, downloads the configuration settings for home location, and resets the device. The device registers with the home location configuration settings. Cisco Unified Communications Manager always uses the Communications Manager Group setting from the phone record. The device always registers to its home location Cisco Unified Communications Manager server even when roaming. When a phone is roaming, only network location settings such as bandwidth allocation, media resource allocation, region configuration, and AAR group get changed. Note Configuration This feature needs to be enabled at both the system-level, and at the device level. At the system level, this feature uses the following components: • Physical Location—The physical location of the device pool. During registration, the system matches the device registration location to a subnet in the Device Mobility Info in order to assign an appropriate device pool. • Device Pool—Location-specific device settings such as media resources, regions, and SRST references. For roaming devices, the system assigns the device pool that matches that device’s physical location. • Device Mobility Group—A logical group of sites with similar dialing patterns. For example, an enterprise with a worldwide network might set up groups that represent individual countries. The device mobility group setting determines whether the device is moved within the same geographical entity, primarily to allow users to keep their own dial plans. • Device Mobility Info—This info contains the subnets that the system provides for roaming devices, and the device pools that the system can assign to roaming devices that register to one of those subnets. At the device level, the feature must be turned on for devices to use this feature. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 44 Remote Worker Features Device Mobility Overview