Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 154

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Control Unit Problems
Module Problems
!
CAUTION:
This section does not apply to the processor or power supply.
Although the system is designed so that you can remove and
replace modules without affecting call processing, partially inserting
and removing a module can cause a cold start.
Adding a 100D module or changing any of its DS1 parameters
requires that the system be idle.
When you replace a module, be sure to use the same module type.
For example, do not put a 008 MLX module in place of a 400 GS/LS
module. If a module is replaced with another type of module, or if a
module is added to the system without powering down the system
first, a cold start occurs.
If you move any module to a different slot, be sure to renumber the
modules by selecting
See System Programming for information on board renumbering.
To replace a module, follow the steps below.
Busy-out or reset the module. Busy-Out is recommended.

Label all cords (if they are not labeled already) and then unplug

them from the module.
For information on labeling trunk and cords, see Chapter 4 in Installation .
For instructions on checking poorly labeled wiring, see
Unlabeled Wiring''
Run a demand test by entering test mode.

Remove the module by pushing up firmly on the tab at the bottom

rear of the module and inspect the module for visible damage.
Insert the new module. While holding the tab, bring the bottom of

the module towards you and away from the carrier.
Board Renumber
following Step 8.
Page 4-64
from system programming.
''Checking
Issue 1
June 1997