Patent ID: 9664496
Date: 2017-05-30
CPC Classifications: G01B,H04B

Claim:
1. A method of determining a cable length, comprising: in a network device comprising a transceiver: transmitting a first series of pulses of a first pulse width onto a cable; receiving reflections of the first series of pulses, the receiving comprising: dividing a period of time for receiving the reflections of the first series of pulses into a plurality of segments; dividing the first series of pulses into a plurality of groups of pulses, each corresponding to a distinct segment; and integrating the reflections of each group of pulses during a corresponding segment; transmitting a second series of pulses of a second pulse width onto the cable, wherein the second pulse width is wider than the first pulse width; receiving reflections of the second series of pulses; determining if the reflections of the first series of pulses satisfy a criterion; and calculating the cable length using either the reflections of the first series of pulses or the reflections of the second series of pulses, based at least in part on the reflections of the first series of pulses satisfying the criterion.