Splice detection feature, Following functions (see, Figure b-1 – ADTRAN HDSL2 User Manual
Page 74
HDSL New Enhanced Feature Overview
HDSL2 for General Distribution Installation and Maintenance Practice
B-2
61223HDSL2L2-5B
Figure B-1. TScan Diagnostic Capabilities
NOTE
For implementation of
TScan
please contact an ADTRAN sales
representative.
Splice Detection Feature
Runtime TScan 2.0
TM
splice detection feature is an ADTRAN proprietary non-intrusive
algorithm for detection of anomalies (bad splices) in the copper pair.
Data transmission transceivers (especially echo-cancelled technologies) are subject to perfor-
mance degradations and errors in the presence of bad splices. A splice may be benign for a
period of time, allowing a circuit to behave appropriately for portions of the day. However, over
time the splice will oxidize and incur small, rapid changes in impedance. This inconsistency in
behavior makes the problem difficult to locate. Additionally, an impedance change that is
large enough to cause the transceiver trouble may still be small enough to be undetected by
test equipment utilized on the copper pairs. Therefore a non-intrusive method of identifying
these bad splices has been developed to aid the customer in troubleshooting their distribution
plant.
NOTE
The Splice Detection Feature is included with this product as an aid
to troubleshooting. Due to inconsistency in environmental condi-
tions and their effect on telecommunications plant, ADTRAN cannot
guarantee the accuracy of the measurements. Comparison to
existing engineering drawings should provide exact locations of
suspect splices indicated by ADTRAN algorithms.
C
CO
Outside Plant Facilities
R
Open on either conductor
C
R
Open on both conductors
C
R
Short between T&R
C
R
Short to ground from either
or both conductors
X
X
X