An N-way radio frequency dividercombiner is formed as a combination including an input port electrically coupled to a first 2-way dividercombiner and a second 2-way dividercombiner. The output servers may transmit messages of topical interest to a subset of the subscribers, concurrently. The inspection system also has an inductive sensor positioned within the electromagnetic shield. This signal is received from a location monitor that had received the RF signal from the emergency call transmitter.