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TDR (Time Domain Reflectometry)
A technique used to track faults in networks, such as cable breaks or loose connections. A pulse of a known shape is transmitted over the network and an echo is created when the pulse hits an obstacle or cable end. The time elapsed between the sending of the pulse and receiving the echo can be used to locate the origin of the echo and therefore the break. Sophisticated testing equipment is available to perform this test and to analyze the results.
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