AT&T 3.0 manual To replace a module, follow the steps below

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 Board Renumber from system programming. See System Programming for information on board renumbering.

To replace a module, follow the steps below.

1 Busy-out or reset the module, Busy-Out is recommended.

2Label 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 “Checking Unlabeled Wiring” following Step 8.

3Run a demand test by entering test mode.

4Remove the module by pushing up firmly on the tab at the bottom rear of the module and inspect the module for visible damage.

5Insert the new module. While holding the tab, bring the bottom of the module towards you and away from the carrier.

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