Upgrading From Sl-1 N (Qca58 Ce Cabinet) To Meridian 1 - Nortel Meridian SL-1 Supplementary Manual

6-4 Upgrading from SL-1 N (QCA58 cabinet) to Option 61

Upgrading from SL-1 N (QCA58 CE cabinet) to Meridian 1

Option 61
Shelf upgrades to Meridian 1 553-3001-253
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.
3 Remove the covers from the CE cabinet.
4 Invoke emergency line transfer by setting the line transfer switch on
all QPC84 Power Monitor circuit packs to ON or 1.
• Set the -48 V cabinet input breaker located on the power control
shelf or power distribution box in the CE cabinet to OFF.
• Tag and disconnect the cables from all the faceplate connectors of
circuit packs located on the QSP41 CPU/MEM shelf.
• Remove all circuit packs from the CPU/MEM shelf.
• Tag and disconnect cables A, B, C and D from the end of the
CPU/MEM shelf.
• Tag and disconnect the four power and ground leads connected to
the lugs on the end of the shelf backplane.
5 Remove mounting screws securing CPU/MEM shelf to cabinet frame
and remove shelf from cabinet.
• Position new QSD60 CPU/MEM shelf in the position vacated by
the QSP41 CPU/MEM shelf and secure to cabinet frame with four
mounting screws.
6 Connect:
• the four power and ground leads from cabinet power wiring
harness to the -48V 0, -48V 1, -48V GND and L GND lugs on the
end of the new CPU/MEM shelf backplane (Figure 6-1).
• cables A, B, C and D to the connectors on the end of the shelf
(Figure 6-2).