Lucent Technologies Release 6 Manuel D’Utilisation
DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Test Telephones and Other Equipment
Page 6-7
Test Stratum 3 Clock
6
Test Stratum 3 Clock
This sections tests the ability of the Stratum 3 clock to correctly provide timing
and alarms to the system.
and alarms to the system.
!
CAUTION:
The following procedures are destructive to DS1 data and should not be
attempted while there are DS1 facilities in active use.
attempted while there are DS1 facilities in active use.
Check for Red LEDs
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 6-1
.
Table 6-1.
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.
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.
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
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