Stratum 3 Clock LED Indicators
| Card |
LED Label |
Procedure |
PAI
|
REF A
|
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.
|
PAI
|
REF B
|
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.
|
PAI
|
ST A
|
Replace the ST3 card
|
PAI
|
ST B
|
Replace the ST3 card
|
CI
|
FAIL
|
Check wiring for its associated DS1 reference and replace the circuit pack if necessary
|
ST3
|
FAIL
|
Replace the circuit pack
|
ST3
|
LOCK
|
Ignore this LED
|
ST3
|
HOLDOVER
|
Ignore this LED
|
ST3
|
FREE RUN
|
Ignore this LED
|
TOCA
|
FAIL
|
Replace the circuit pack
|
TOCA
|
PORT ALM
|
Replace the circuit pack if necessary
|
