Replace the clock controller
Task summary list
The following is a summary of the tasks in this section:
Replace the clock controller
. Refer to
Replacing the clock controller on page 81.
Caution:
Firmly touch the metal frame of the cabinet to discharge static electricity from your body
before handling circuit packs.
Caution:
Do not deviate from this procedure. Deviation will not cause the system to SYSLOAD or
initialize, but will stop call processing.
Replacing the clock controller
1.
Make sure that the clock controller card being replaced is associated with an
inactive CPU. Switch, if necessary, using:
LD 35
SCPU
2. Disable the clock controller card being replaced using:
LD 60
DIS CC x
3. On the clock controller card being replaced, set the ENB/DIS switch to DIS.
4. Disconnect cables from clock-controller card being replaced.
5. Remove card from shelf.
6. Set the ENB/DIS switch to DIS on the clock-controller card being added.
7. Make sure that the switch settings are correct.
8. Install new clock-controller card in same slot as the defective card.
9. Reconnect cable(s) to clock-controller faceplate.
10. Set ENB/DIS switch on new clock controller to ENB.
11. Enable new clock-controller card using:
LD 60
Replace the clock controller
ISDN Primary Rate Interface Maintenance November 2011 81
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