Black Box TS590A User Manual page 35

SOHO TESTER
S P
PLIT AIR
A split pair is an error in the twisting of the
wires together within the cable. The cables
are generally made up of eight wires
twisted together in four pairs. These four
pairs are designated as pairs by the wiring
standards and are intended to carry a
signal and its return. 1&2, 3&6, 4&5, and
7&8 are the pairs designated by T568A/B
for an RJ-45 jack or plug. A cable can be
wired with correct continuity but not with
correct pairing. This most often happens
when the cable is terminated consistently
at both ends, but in the wrong order. If the
only error is a split pair error, the cable has
correct continuity. If crosstalk is not a
concern (as in flat satin cable), the cable is
good if the only error is the split pair error.
The SPLIT icon and the pin numbers on
32