AT&T MERLIN LEGEND Installation & Maintenance Manual page 123

Installation
Note: For each 400EM module, set the dual in-line package
(DIP) switches on the module for the desired tie-trunk options
(see Figure 72 and "Tie-Trunk Signaling" in Chapter 1).
Follow these steps to remove a module:
1. Press upon the tab on the bottom of the module.
Pull the bottom of the module away from the carrier.
2.
Lift upward to disengage the module from the rod on the top
3.
of the carrier.
Provide Proper Grounding
Proper grounding of the system protects it from
lightning
power surges
power crosses on CO lines/trunks
electrostatic discharge (ESD)
WARNING:
Grounding circuit continuity is vital for safe operation. There
is a risk of electric shock if the system is not properly
grounded.
Follow these steps to properly ground the CU power supply
modules (see Figures 11 and 12):
1. Attach a #12 or #14 ground wire to the grounding screw on
each power supply module.
2. Connect the other end of each ground wire to the terminals of
the single-point ground bar on the AC outlet box.
The Control Unit 3-15