Nortel Meridian 1 Replacement Manual page 88

Page 88 of 362 Replacing equipment
553-3001-520 Standard 16.00 April 2000
Removing equipment
1 Disable the CPU:
a In a single-CPU system, set the ENB/DIS switch to DIS on the
QPC580 CPU Interface (IF) Card. This will stop call processing.
b In a dual-CPU system, the CPU on the backplane you are replacing
must be inactive:
If you need to switch CPUs:
LD 35
TCPU
SCPU
****
Set the NORM/MAINT switch to MAINT on the active CPU
interface (IF) card. (This keeps the system from switching to the
inactive CPU.)
Set the ENB/DIS switch to DIS on the inactive interface card.
2 Software disable network equipment cards:
a Disable all network loops on the shelf by disabling the peripheral
signaling card:
LD 32
DSPS x
****
b Disable all other cards that might be in the module, such as serial
data interface (SDI) cards or primary rate interface (PRI) cards.
If the system terminal is assigned to an SDI that will be disabled,
assign it to another port before the SDI is disabled.
test CPU
switch CPU
exit LD 35
Table 4 lists the loops represented by "x"
exit LD 32
CAUTION