Nortel Meridian 1 Manual page 867

• If clock controller 0 is active, switch clocks:
SWCK
• Make sure clock controller 1is active:
SSCK 1
• Disable clock controller 0:
DIS CC 0
• Set the ENB/DIS switch on clock controller 0 to DIS.
• Disconnect the NT8D74 clock controller cable.
• Label all the cables to the clock controller card, disconnect them,
and remove the card.
• Set the ENB/DIS switch to DIS on the replacement QPC471 Clock
Controller card. Set the option switches on the replacement card (see
Table 12-17).
• Connect the NT8D74 clock controller cable to the clock controller
card.
• Add together the lengths of the two clock controller to junctor
cables. Set SW4 on the replacement card according to this total
length (see Table 12-17).
Note: When configuring clock controller cards, be sure to set the
switches correctly and install the card in the slot and module indicated.
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 QPC471 Clock Controller Card, and
reconnect the cables to the card.
• Connect the NT1R04AA clock controller to junctor cable to
connector J11 on the junctor panel.
Upgrade system installation Upgrading to Meridian 1 system options
Upgrades to Meridian 1 option 81
to switch to clock controller 1
to get the status of clock controller 1
to disable clock controller 0
12-103