Apparatus, method and system for notifying a communications-switching center that subsequent communications directed to a wireless number associated with the wireless unit are to be routed to a destination number associated with the wireless unit. In response to a triggering event by the wireless unit through the base unit, the base unit can cause the wireless unit to transmit an SMS message to the communications-switching center. The SMS message can include a notification that subsequent communications directed to the wireless number associated with the wireless unit are to be routed to the destination number associated with the wireless unit.