Nortel Meridian SL-1 Supplementary Manual page 42

2- 34 Upgrading LE, A, M, MS to Option 21
Shelf upgrades to Meridian 1 553-3001-253
• Connect a NT8D77AC floppy disk interface cable from the
connector on the faceplate of the QPC742 circuit pack to the
connector on the front of the NT8D68AA FDU.
• Set the switch on the QPC687 circuit pack to NORM.
• Set the AC INP circuit breaker on the -48 V rectifier in the
QCA109 cabinet to ON.
• Set the CAB INP circuit breaker on the QSP43 power shelf to ON.
11 Insert the floppy disks into disk drives. A system reload (SYSLOAD)
should occur. Wait for the SYSLOAD to be completed.
12 Reestablish normal service on the system as soon as it is determined
that trunk connections can be made to an attendant console or other
suitable telephone. To restore normal service, set the line transfer
switch on the QPC84 circuit packs to OFF or 0.
• Using the appropriate overlay programs, obtain printouts of all TN
assignments and system features and compare with the printouts
obtained before converting.
13 Set the ENB/DIS switch on all the QPC84 circuit packs to ENB.
14 If required, remove the tape unit or the QMM38 Mass Storage Unit (if
equipped) and shelf from the cabinet.
15 Install cabinet covers or doors and dispose of surplus equipment.