Nortel Meridian 1 Hardware Replacement Manual page 226

Page 226 of 250
553-3001-520 Standard 17.00 January 2002
Replacing equipment
See Option 11C ISDN BRI Hardware Installation and Maintenance
(553-3011-311) for a description of all maintenance commands, and System
Messages Guide (553-3001-411) for interpreting system messages.
DANGER
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
Make sure the card you are removing is disabled and the other
clock controller card is active and in free run mode.
SSCK x
TRCK FRUN
Disable the clock controller card you are removing.
DIS CC x
"x" is the card number—0 or 1
"x" is the card number—0 or 1
switch system clock from active to standby
"x" is the card number—0 or 1