Profile: T S K Electronics, Inc. manufactures intercom and video surveillance equipments. Series 6000 modular master is a direct select intercom. It is of metal rugged construction with standard off the shelf modules. System capacity ranges from 6 to 96+ stations in both parallel and standard annunciation configuration. Micro 600 institutional intercom system permits the designer to integrate the intercom to a programmable logic controller (PLC) with a graphic user interface (GUI). Each controller has the capacity of up to 1600 stations and 64 masters. With multiple controllers, system capacity is unlimited.