AT&T 3.0 manual Installing the Control Unit Housing Release 2.1 and Earlier

Modifying a Release 2.1 or Earlier

Processor for Key Mode

4On the exposed portion of the processor board, find the header marked HDR4; it is in the upper-left area.

A shunt is attached to one of the pins on the HDR4 header.

5Remove the shunt from the single header pin; then reinsert it so that it covers both pins on the header.

6Take the KF label from the Jack Numbering Labels Sheet, which is packaged with the feature module, and fasten it to the wire manager at the base of the module.

Installing the Control Unit Housing

(Release 2.1 and Earlier)

To install the control unit’s housing, follow the steps below.

1 Lay the front panel(s) face down.

2If you are housing more than one carrier, connect the front panels together.

a Line up the arrows.

b Slide the panels until the semicircles form a complete circle. See Figure E-2.

3Connect the side panels to the front panel(s) in the same way.

4Pick up the housing and place it on the control unit. If the system has more than one carrier, make sure you hold the housing only from the basic carrier side; otherwise, the housing can disassemble.

a Line up the wire clips that are attached to the carrier with the recesses on the outside of the side panels.

b Push back the panels until the clips hook over the tabs and rest in the recesses.

Maintenance and Troubleshooting E–3