AT&T MERLIN LEGEND Installation & Maintenance Manual page 112

Installation
8. Position the expansion carrier on the screws and slide it to the
left, reconnecting the card extender on the expansion carrier
to the connector on the already mounted carrier. Make sure
the connection is secure.
Check to see that the carrier is level and that the housing
9.
clips extend as far as possible from the right side of the
carrier. Tighten the screws.
Install the Power Supply Modules
W A R N I N G
Do not attach any cables or power cords to the power
supply module until it is installed in the carrier. Do not apply
power to the CU until all the modules and power equipment
are installed. Once they are installed, follow the procedures
under "Turn the Power On" in this chapter. Failure to comply
can result in shock hazard or damage to the equipment.
If a ring generator is needed, install it in the power supply
module before the power supply module is installed in the
carrier (see "Install a Ring Generator in the Power Supply
Module" in this chapter).
CAUTION:
To prevent damage from electrostatic discharge (ESD),
avoid touching leads, connectors, pins, and other
components. Use a properly grounded wrist strap.
CAUTION:
Remove the protective cover from each module's gold-
finger connector before installing the module into the
carrier.
3-4 The Control Unit