G.hs: Bridge Taps Detection and Location

As cable bundles are wired together at various distribution points, not all lead to a telephone line termination. Some wires simply T- off' at points and can continue in multiple cables. For voice-band signals, such connection do not present any significant effect. However for high frequency signals such as for xDSL, the wires act as transmission lines and signals will propagate down both directions from a T'. The line which is not terminated will create a reflection of the signal as the energy can not be absorbed which will in turn disrupt the signal quality. We propose an addition of an optional probing technique for the detection and location of these impairments.

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