Abstract: A micro-processor controlled apparatus for testing a network cabling. The apparatus is permanently installed at the network cabling site. The micro-processor controls a driver which sequentially provides a voltage carrying current to the individual conductors of each cable in the network. In this manner each conductor of each cable is tested. Hard-wiring and a shorting bar which disengages upon installation of a terminal apparatus provide the voltage carrying current with at least one current path at a remote network port. The voltage carrying current is returned from the remote network port on at least one conductor coupled to a receiver. The receiver samples a plurality of conductors, preferably for evidence of the voltage. In this manner, the receiver samples for the parallel return of a digital word. If the returned digital word agrees with an expected digital word stored in the memory of the micro-processor, an indicating device will signal proper wiring of the tested cable.