Triple-Play Service Deployment

Chapter 4: Troubleshooting the Copper Plant for IP Services
Typical Copper Pair Faults
Short
Continuity between two wires
without an external jumper or
loop back plug in place.
Cross
One or both wires in a pair cross
with one or both wires in a
second pair. Identify by use of
third pair individual wire.
Ground (Earth) Fault
One or both wires in a pair read
continuity with external ground
or shield.
Intermittent
A break or “open” which appears
and disappears as the wire or
connector is flexed. Identify by
same method as open pairs.
Open Pairs
A break or “open” fault appears.
Use a split-pair loop back plug or
individually use one wire in each
of two pairs to determine which
individual wire is open.
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