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AssigneeNorthern Telecom Limited
InventorDavid D. Clegg
Estimating the term…
Telecommunications (e.g. ISDN) wiring is tested by sequentially supplying to each wire at a first location a pulse sequence identifying that wire while connecting to a common potential other wires, and detecting pulses on the wires at a second location while simultaneously providing a return path connection for the pulses to the other wires. The return path connection is provided by connecting between each wire and a local ground at the second location a resistor and a diode poled to be reverse biassed by pulses on the wire. The detected pulses are counted and the result used to drive a LED (light emitting diode) display comprising N green LEDs indicating correct wiring and N(N-1) red LEDs indicating incorrect connections, the LEDs being arranged in an N by N array with the green LEDs along one diagonal.
A method of testing wiring comprising at least two wires extending between two locations, comprising the steps of:
A method as claimed in claim 10 wherein the step of monitoring comprises cyclically counting pulses.
A method of testing telecommunications wiring comprising at least two wires extending between two locations, comprising the steps of:
Test apparatus comprising:
Test apparatus for testing telecommunications wiring comprising four wires extending between two locations, comprising a transmitter unit and a receiver unit for connection to the wires at the respective locations, the transmitter unit comprising:
Apparatus for testing telecommunications wiring comprising a plurality of N wires extending between two locations, the apparatus including means for conducting test signals between said locations via said wiring for determining interconnections via said wiring, and display means for representing said interconnections, the display means comprising an N by N array of indicators of which N are of a first color for indicating correct interconnections and N(N-1) are of a second, different, color for indicating incorrect interconnections.
Dependencies are inferred from the claim text.