Task List: Test Stratum 3 Clock; Check For Red Leds - Avaya MCC1 Installation And Upgrades

Test Telephones and Other Equipment

Task List: Test Stratum 3 Clock

These procedures test the ability of the Stratum 3 clock to correctly provide timing and alarms to the
system.
CAUTION:
The following procedures are destructive to DS1 data and should not be attempted while
DS1 facilities are active.
Task List: Test Stratum 3 Clock
1

Check for Red LEDs

2
Verify Timing to the System
Check for Red LEDs
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1
Turn on the Stratum 3 clock and wait 40-50 seconds to allow the system to complete the on-board
diagnostics before checking LEDs.
2
If there are any red LEDs, follow the procedures in
Table 32: Stratum 3 Clock LED Indicators
Card LED Label
PAI REF A
PAI REF B
PAI ST A
PAI ST B
CI FAIL
ST3 FAIL
ST3 LOCK
ST3 HOLDOVER
ST3 FREE RUN
TOCA FAIL
TOCA PORT ALM
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738
on page 738
on page 739
Procedure
Check that the CI circuit pack on the left is inserted properly. Check wiring for DS1 in
carrier "A" which connects the system to the CSU and the External Synchronization
Clock at the MDF through a Y-cable assembly. If all else fails to clear the LED then
replace the circuit pack.
Check that the CI circuit pack on the right is inserted properly. Check wiring for DS1
in carrier B which connects the system to the CSU and the External Synchronization
Clock at the MDF through a Y-cable assembly. If all else fails to clear the LED then
replace the circuit pack.
Replace the ST3 card
Replace the ST3 card
Check wiring for its associated DS1 reference and replace the circuit pack if necessary
Replace the circuit pack
Ignore this LED
Ignore this LED
Ignore this LED
Replace the circuit pack
Replace the circuit pack if necessary
Table 32.
SI Installation and Upgrades
June 2004