Bogen microprocessor module for PCM zone paging system One required per system Provides power, data and audio connections for the PCM system Connected to other PCM modules electrically through internal cables Modules mechanically joined by sliding together interlocking tabs and securing with a screw on the rear panel Designed to be wall mounted with modules side by side like books oriented so that when the blue connector blocks are on bottom, PCM TIM is far left, PCM CPU is first from left and the first PCM ZPM module is on the right Includes a set of dip switches that set the SYStem ID, a power LED, a program/run switch, a data link RCA jack used to connect to satellite systems , power in jack/terminals, and audio connections for PA, low power BGM, high power BGM, emergency/shift change trigger and auxiliary contactsBGPCMCPU