Description ESCO 941-0004 TSC-1005C ESCO Intercom (5 Station W/Call) The TSC1005C is a 5 channel 2-way intercom with an external switch activated doorbell type call-in feature. Speakers and call buttons wire to a terminal strip located on the bottom of the intercom. The TSC1005C has an internally mounted microphone. It was designed to suit such applications as service stations, C-stores, truck stops, or fast food restaurants. The use of ESCO speakers and interconnect cable is recommended for the best voice quality reproduction.