Abstract: A cable pair to telephone verification system including a processor interfaced wtih pairs of subscriber lines and a trunk connected to automatic number identification (ANI) electronic switching means. The process is programmed to select pairs of subscriber lines in sequence and to connect a line pair which is not busy to the processor for testing. The processor generates a special access code on receipt of a dialing tone from a non-busy line pair, the ANI switching means being responsive to this special access code to send the associated subscriber telephone number to the processor via the trunk. The processor is also programmed to provide a data read out of information relating to the line pairs under test and whether or not faults are present.