Using the Sharing Mappings feature, the station name and the station mapping information can be shared across multiple Communication Manager. When you call into a PBX other than your own, the called station displays your name and number as administered on your own PBX. Extension to Cellular users can be recognized on another PBX where they are not administered. When the PBX acquires the shared information, it creates a temporary mapping to associate the shared cell phone number with the shared extension and the station name. Any calls with a calling number matching a temporary mapping use the shared station name and displays the extension for incoming call.