/mcpIf the device moves to another location with same mobility group (for example, Richardson, USA, to Boulder, USA), the CSS information gets taken from the roaming device pool settings. With this approach, if the user is dialing PSTN destinations, the user reaches the local gateway. The following table describes the device pool parameters that the system uses for various scenarios. Table 6: Device Mobility Group Scenarios Parameters Used Scenario Roaming Device Pool: yes Location: Roaming device pool setting Region: Roaming device pool setting Media Resources Group List: Roaming device pool setting Device CSS: Roaming device pool setting (Device Mobility CSS) AAR Group: Roaming device pool setting AAR CSS: Roaming device pool setting A roaming device moves to another location in the same device mobility group. Roaming Device Pool: yes Location: Roaming device pool setting Region: Roaming device pool setting Media Resources Group List: Roaming device pool setting Device CSS: Home location settings AAR Group: Home location settings AAR CSS: Home location settings A roaming device moves to another location in a different device mobility group. Because the device is roaming, it takes the roaming device pool settings, including the Device Mobility Calling Search Space, AAR Calling Search Space, and AAR Group. A device roams, and a device mobility group does not get defined for the home or roaming device pool. Device Mobility Prerequisites • The phone must have a dynamic IP address to use device mobility. If a phone with a static IP address roams, Unified Communications Manager uses the configuration settings from its home location. • The Device Mobility feature requires you to set up device pools with site-specific settings. This chapter describes only the device pool settings that relate to device mobility. For more detailed information on configuring device pools, see the "Configure Device Pools" chapter in the System Configuration Guide for Cisco Unified Communications Manager. • Cisco Database Layer Monitor service must be running on the same node as the Cisco CallManager service. • Cisco TFTP service must be running on at least one node in the cluster. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 47 Remote Worker Features Device Mobility Prerequisites