800-357-104-01, Revision 01
Troubleshooting and System Testing
HMS-357 List 4 and List 5
September 29, 2000
67
T
ROUBLESHOOTING
AND
S
YSTEM
T
ESTING
shows system loopbacks and test access points. You can do additional system tests through test cards
(see
“Installing a Test Card (HTC) (Optional)” on page 69
). You can route multiplexer output to provide local
access to any DS1 or E1 channel on the DS3 transport at an electrical DSX-1 or E1 cross-connect point using
cut-through Cards (see
Figure 37.
System Loopbacks and Test Access
Removal and replacement of line units should not be your first approach to troubleshooting.
You will lose important performance management information which may help you resolve a
line problem. Before making a call to Product Support, read the Performance Management
history and conduct voltmeter tests for leakage to determine if the source of trouble is a
marginal line or a facility problem.
