Methods and apparatus to perform and/or analyze communication channels are
described. In one embodiment, a test signal may be generated and
transferred using a first signal route to a line-under-test in response
to line qualification mode. The first signal route may include a
compensation device to modify the test signal. In some embodiments, a
reflected signal from the line-under-test may be received in response to
the test signal. A second signal route may be utilized to route the
reflected signal in response to line qualification mode.