Six IC Controls ASC's, Accessory, Switch Controllers, before Lionel, each controls (4) Atlas switches. Handheld remote/ RF connected to the Command Base has switch control buttons, programming each switch with a number 1 through 24. Top picture center. Command base cable is connnected to one of the silver box, TPC's Track Power controllers. The RF signal is daisy chained, with Cat 5 wire between the 10 IC Control devices, and the command base lower right. As pictured, the system, 20 years later, still works well. Both, newer Legacy, and MTH DCS controls, never worked as well as this original control system.
