Lucent Technologies 555-661-140 manual 13 on

MERLIN LEGEND Communications System Release 6.1	Issue 1
Installation 555-661-140	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.