The status of the cable pair.
'unknown' -- none of the following.
'terminated' -- the pair is properly terminated at the
remote end.
'notCompleted' -- the test on this pair is not completed.
'notSupported' -- the test on this pair is not supported.
'open' -- the pair is open.
'shorted' -- the pair is shorted.
'impedanceMismatch' -- the impedance of the pair is
mismatched.
'broken' -- the pair is broken.