Abstract: A system for identifying interconnections between individual points in a communications network of the kind in which includes a plurality of multiple conductor links, individual conductors of which are selectively terminated and interconnected at corresponding individual terminals of terminal blocks; a controller broadcasts over a test network that includes the terminal blocks an inquiry that identifies a starting individual conductor to supervisors associated with the terminal blocks; the supervisor associated with the terminal block that terminates the starting conductor applies the inquiry to the individual terminal that corresponds to the starting individual conductor for transmission on the communications network, and each supervisor reports to the controller over the test network the identitites of any one or more individual terminals of its associated terminal block that detect the inquiry; whereby interconnections between the starting conductor and one or more other individual conductors in the commun