Nortel Meridian SL-1 Supplementary Manual page 139

Upgrading from SL-1 SN (QCA141 CE cabinet) to Meridian 1
Option 21
1 Obtain printouts of all the characteristics (TN, loop, telephones and all
other assignments and features) of the existing system. Retain these
printouts for an after conversion check.
2 Using overlay program 43, perform a data dump to the existing disks.
3 Remove the front and rear covers from the CE cabinet.
4 Designate (but do not disconnect) all the cables connected to the front
of the QPC45 (if equipped), QPC139 (if equipped), QPC425 and
QPC376 circuit packs.
5 Unseat both disks from the disk drives.
Note: The following steps will interrupt system service and
emergency service (if provided) will be connected.
6 Switch line transfer switch on the QUAA3 power unit to ON or 1.
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7 Tag and disconnect the wires from the five lugs and connector J1 on
the CE shelf backplane (Figure 11-1).
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8 Position the new QPC700 CE backplane in the space vacated by the
removed CE shelf backplane and secure with the nuts and washers
removed from the old shelf. To ensure that the backplane is properly
aligned with the plastic circuit pack guides, insert a circuit pack in the
shelf from the front of the cabinet. Adjust the backplane if necessary.
9 Reconnect the power wiring and connector J1 previously disconnected
from the old backplane as shown in Figure 11-1.
Set the CAB INP breaker on the QUX19 unit to OFF.
Disconnect the cables from front of all circuit packs on CE shelf.
Remove all circuit packs from the CE shelf.
Remove the nuts securing the CE shelf backplane to the rear of
the cabinet frame and remove the backplane from the cabinet.
Upgrading from SL-1 SN to Option 21 11-3
Shelf upgrades to Meridian 1 553-3001-253