Upgrading From Sl-1 Xn To Meridian 1 Option 71 - Nortel Meridian SL-1 Supplementary Manual

8-4 Upgrading from SL-1 XN (QCA55 cabinet) to Option 71

Upgrading from SL-1 XN to Meridian 1 Option 71

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 Set ENB/DIS switch on all Power Monitor cards to DIS.
• Load overlay program 35 and STAT CPU to determine which
CPU is active. If necessary switch CPU's (SCPU) to ensure that
system is operating in CPU 0.
• Disable memory associated with CPU 1 (10, 11, 12, and so on).
• Disable CMA 1.
• Set ENB/DIS faceplate switches on the QPC215 SBE associated
with CPU 1 to DIS.
• Load overlay program 39 and STAT SCG to determine which
SCG is active. If necessary switch SCG's (SCLK) to ensure that
system clock 0 is active.
• Set Maintenance/Normal switch on CPU 0 to Maintenance.
4 Set CPU 1 breaker on the QBL21 power distribution box to OFF.
5 Disconnect cables from connectors A, B and C on the end of the
CPU 1 (QSD17 shelf).
6 Tag and disconnect the power monitor connector (connector D) and
power connector from the cabinet power wiring harness to the end of
the CPU 1 (QSD17 shelf).
• Tag and disconnect cables from connectors on faceplates of circuit
packs on CPU 1 (QSD17 shelf).
• Remove all circuit packs from CPU 1 (QSD17 shelf).
Note: The QPC215 SBE, QPC775 CC (or QPC471 CC) and the 5/12
V CONV circuit packs are required for the new CPU/MEM shelf. The
remaining packs removed should be packed and stored.