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MERLIN LEGEND Communications System Release 6.1
Installation
555-661-140
Issue 1
August 1998
Installing the Control Unit
Page 2-42
Replacing a Module
To remove and replace a module, follow the steps below. Refer to
Figure 2-13 on page 2-43
.
!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 about labeling trunk and extension cords, see Chapter 3,
“Installing Telephones and Adjuncts” and Chapter 4, “Connecting the
Control Unit to the Network Interface.” For instructions on checking
unlabeled wiring, see “Checking Unlabeled Wiring” in Chapter 3 of the
Maintenance and Troubleshooting
guide.
!Run a demand test by entering the test mode.
!Power down the system, if required. See “Powering Down the
System,” later in this chapter, for instructions.
!Remove the module by pushing up firmly on the tab at the bottom
rear of the module.
!While holding up the tab, swing the bottom of the module towards
you and away from the carrier.
!Lift up the module to disengage it from the rod on the top of the
carrier.
!Inspect the module for visible damage.
!Insert the new module. See Figure 2–10.
! Restore the module. Refer to Chapter 7, “Initializing and Testing the
System,” for instructions.
! Connect the trunk and extension cords.
! Attach a tag, error printout, and any information that will help
identify any visible problems or failure symptoms.