AT&T 3.0 manual Installing the Modules, Guidelines

Installing the Modules

Installing the Modules

CAUTION:

Use a properly grounded wrist strap to prevent damage from electrostatic discharge (ESD) when installing the modules, and avoid touching leads, connectors pins, and other components.

Guidelines

Follow these guidelines when you install modules, as indicated on the Control Unit Diagram of Form 1, System Planning:

Do not leave empty slots between modules. The system ignores modules installed beyond any empty slot.

If a phantom module (a programmed empty slot) is indicated on the Control Unit Diagram, make sure the slot remains empty and do not install any modules to the right of it. The system ignores any modules installed to the right of a programmed empty slot.

Make sure you install each module in its assigned slot. If you install a module in the wrong slot, the system will not function properly,

Be sure to place all 012 modules and all 008 OPT modules without built-in ring generators in carriers with modules that have ring generators so that the modules without ring generators can be supported.

Once you have installed the power supply and the processor in the basic carrier, use the remaining slots for the modules as follows:

—Basic carrier: slots 1 through 5

—First expansion carrier: slots 6 through 11

—Second expansion carrier: slots 12 through 17

2-32Installing the Control Unit