Solid State Commutator Switch.

This application discloses a switching system for connecting a plurality of input signals to a plurality of selected outputs. A plurality of input signals are connected to a crosspoint matrix through a buffer circuit. The crosspoint switching matrix is comprised of a plurality of CMOS crosspoint switch integrated circuits and switching is controlled by a microprocessor which provides the desired connections for selected outputs. A built-in-test circuit BITE is provided for testing each circuit path in the switching system.