Qpc471, Qpc775 Clock Controller Card - Nortel Meridian 1 Replacement Manual

QPC471, QPC775 Clock Controller Card

Use this procedure to replace a clock controller (CC) card.
Note: The QPC775 Clock Controller is used in Canadian and
International applications. QPC775 and QPC471 cards cannot be
combined in one system.
See the Option 11C ISDN BRI Hardware Installation and Maintenance
(553-3011-311) for a description of all maintenance commands, and the X11
System Messages Guide (553-3001-411) for interpreting system messages.
Module covers are not hinged; do not let go of the cover. Lift the cover
away from the module and set it out of your work area.
Removing equipment
1 The clock controller card must be on the inactive CPU. If you need to
switch the active CPU:
LD 135 (for Options 51C, 61C, 81, and 81C)
SCPU
****
2 Disable the clock controller card:
— The card you are removing must be inactive:
LD 60
— In a single-CPU system:
Disable the clock controller card.
DIS CC x
— In a dual-CPU system:
Check the status of the clock controller card you are removing.
SSCK x
If the clock is active, switch clocks.
SWCK
Replacing equipment
WARNING
"x" is the card number—0 or 1
"x" is the card number—0 or 1
switch system clock from active to standby
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Hardware replacement