AALogic ST-101, User Manual

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Version 1.0.2 5
The approximate location of the Fault should also be estimated by the pair test equipment. The estimate and
the cable documentation are useful in sectioning the cable for Fault location. The physical location and the
location provided by electrical measurements may not agree.
6.3 S
ECTIONING
The fault should be isolated to as small a cable section as practical prior to attempting fault location. This will
improve the reliability of the fault indications and reduce the time needed to locate the fault. Existing practice
should be followed for sectioning.
The faulted pair being located should be isolated from the CO and any terminating (premise) equipment during
the location.
6.4 C
ONNECTIONS
The ST-101 includes a cord with pair clips. This cord is plugged into the jack on the right side. Only the pair cord
supplied with the ST-101 should be used.
Fault location depends on current flow. The black and red clips must be connected to each side of a resistive
fault as follows:
Fault Description Connections
Short Tip connected to Ring Black to Tip and Red to Ring
Ground Tip or Ring connected shield Black to sheath and Red to grounded wire
Cross Tip or Ring of one pair is connected to the Tip or
Ring of another pair Black to one of the crossed wires and Red to the
other crossed wire.
Split Tip or Ring of one pair is split with the Tip or Ring
of another pair Black to Tip of one of the split pairs and Red to
the Ring of the same pair. See 6.5 below.
6.5 S
PLIT
F
AULTS
During identification of the split, the technician must identify the two pairs involved in the split and if the tips or
rings are split. The diagram below shows a split and how to place temporary short at the end of the section.
Locating a Split
TIP
RING
R
T
TIP
RING
R
T
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
Temporary
Short
Locating a Split
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
Temporary
Short
Locating a Split
TIP
RING
R
T
TIP
RING
R
T
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
Temporary
Short
Locating a Split
TIP
RING
R
T
TIP
RING
R
T
Pair 1
Pair 2
Temporary
Short