Nortel Meridian 1 Manual page 807

11 If necessary, install a new clock controller card in CPU 0:
• Load overlay 35 and, if CPU 0 is active, switch to CPU 1:
LD 35
TCPU
SCPU
****
• Load overlay 60 and, if clock controller 0 is active, switch to clock
controller 1:
LD 60
SSCK 0
SWCK
• Make sure clock controller 1 is active, and if it is, disable clock
controller 0:
SSCK 1
DIS CC 0
SSCK 1
• Set the ENB/DIS switch on clock controller 0 to DIS. Label and
disconnect cables to the card, then remove the card. Note which slot
you removed the card from; you will install the new card in this same
slot.
• Set the ENB/DIS switch on the replacement clock controller card to
DIS and set the option switches on the replacement card (see
Table 12-6).
Note: When configuring clock controller cards, be sure to set the
switches correctly and install the card back into the slot from which you
previously removed the clock controller card. Incorrect settings or
location of the card will allow the system to operate, but may result in
unreliable or unpredictable system function. Disregard silkscreened text
("21,51,61,71") next to the switches.
• Install the replacement card and reconnect the cables. Set the
ENB/DIS switch to ENB.
Upgrade system installation Upgrading to Meridian 1 system options
Upgrades to Meridian 1 option 81
to load the program
to test the CPUs
to switch to CPU 1
to exit the program
to load the program
to get the status of clock controller 0
to switch to clock controller 1
to get the status of clock controller 1
to disable clock controller 0
to verify clock controller 1 is disabled
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