AT&T 3.0 manual Upgrading the Control Unit, Install any expansion carriers

Upgrading the Control Unit

Upgrading the Control Unit

1 Do not remove any of the existing carriers.

2Refer to the Control Unit Diagram on the flip side of System Planning Form 1.

If you are installing an expansion carrier, remove the rightmost module from the control unit and put it aside. See Figure 9-3.

CAUTION:

Before removing any cords from the module, make sure they are labeled first for easier replacement.

3 Install any expansion carriers.

See “Installing Expansion Carriers” in Chapter 2.

4 Install or replace any modules.

See “Installing the Modules” in Chapter 2.

5Replace the processor module. See Figure 9-3.

a Press up on the tab at the bottom rear of the old processor module.

b While the tab is unlocked, pull the processor module towards you, and then lift it straight up.

c Install a Release 3.0 processor module. See “Installing the Processor” in Chapter 2.

9-6Upgrading the System