950-734-100-01, Revision 01
Conventions Used in This DocumentFault Isolation
PLL-734 List 1
December 18, 1998
35
Help Screen
Provides information on using the PAU-710 screens and menus. The Help screen also lists the PairGain Customer
Support and Bulletin Board telephone numbers. Press
to move up a menu level, or
+
to return to the
PAU/PMU Main menu.
F
AULT
I
SOLATION
The following sections detail the fault isolation procedures. For sections that indicate a condition such as “distance
limitation exceeded”, refer to the section
“Specifications” on page 2
for the correct values.
COLU
AND
RT F
AULT
I
NDICATORS
At the CO, you can use the Craft interface to initiate a SDT to determine the cause of any of the following
problems. The SDT test performs Hazardous Potential, Foreign Voltage, Resistive Faults, Receiver Off-Hook, and
Ringers Tests. At the customer site, the following sections provide procedures for isolating faults indicated by the
COLU LEDs.
No LEDs On
•
processor in the COLU stopped
1
Remove and re-insert the COLU.
2
At the Craft interface, go to the COLU Main Screen to view the Performance
report to verify that no alarms exist. If you cannot view the COLU Main Screen,
a communication error exists indicating a faulty COLU.
3
If the LEDs do not illuminate, replace the COLU.
PWR LED Off
•
no input power
•
on-board fuse is blown on COLU
1
Check input power at COTS backplane with COLU removed.
2
If power is present at COTS backplane, replace the COLU.
(6&
&75/
5