Communications link testing.

摘要

Apparatus for testing communications links comprises a microprocessor 20 which causes each telephone number in a range of telephone numbers to be dialled through an exchange test input port (TA1-TA4) by diallers 31-34. Adaptors 41-4N are arranged for clamping to terminal blocks of (e . g.) an exchange main distribution frame. Once the exchange has set up a call scan driver 23 causes each output port of the MDF connected to the adaptors to be pulsed in turn. Detectors 31 min -34 min monitor the input ports TA1-TA4 for pulse presence to cause interrupt of the microprocessor 20. The microprocessor reads a count from the scan driver 23 which is forwarded to a computer 1 which correlates the telephone number dialled with a physical location (equipment number) of the output port.