The Control Unit - AT&T MERLIN LEGEND Installation & Maintenance Manual

Installation

The Control Unit

Use these instructions to install a basic system control unit.
Instructions for installing other equipment, such as an SMDR
printer or an ISDN 7500B Data Module, are also given in this
chapter. All connections to the CU must be made with the control
unit housing removed.
CAUTION:
The system contains components that can be damaged by
electrostatic discharge (ESD). To prevent ESD:
Properly ground yourself when working on the control
unit.
Have the customer maintain relative humidity between
20 percent and 80 percent.
Install the Basic Carrier
Place the backboard and the basic carrier by using the
instructions in Chapter 2 under "Space and Location." Mount the
basic carrier onto the plywood as far left as possible to leave
space for system expansion (up to a total of three carriers).
Follow these steps to install the basic carrier (see Figure 14):
1. Mark the screw hole locations on the backboard by using the
basic carrier as a guide. Make sure the carrier is level before
marking the holes.
2. Lay the carrier to the side.
3. Drill a pilot hole in the center of each of the four marked
mounting-hole locations.
4. Anchor the screws approximately halfway into the backboard.
5. Place the control unit housing wire clips around the molding.
for the screws on the back of the carrier.
The Control Unit
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