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Installing a
Frequency Generator
in the Power Supply
Module
4
Connect one end of the ac power cord to the connector
marked “AC INPUT” on the Power Supply Module.
5 Do not plug the power cord into the outlet at this time.
Refer to “Connecting the Control Unit to an AC
Outlet,” on page 2-90.
The Frequency Generator converts 117 VAC, 60 Hz to
105 VAC, 30 Hz ringing voltage for basic telephones.
Each carrier that has a Basic Telephone Module must have
a Frequency Generator installed in the carrier’s Power
Supply Module. Perform the following steps to install a
Frequency Generator. Refer to Figure 2-17.
WARNING:
Hazardous electrical voltages may be
present if the following steps are not performed
correctly.
1 Before installing the Frequency Generator, make sure
the power switch of the Power Supply Module is off.
2 If there is an Auxiliary Power Unit, unplug it from the
ac outlet and then unplug it from the front of the Power
Supply Module.
3 Unplug the Power Supply Module’s power cord first
from the ac outlet (or from the Auxiliary Power Unit, if
used) and then from the front of the Power Supply
Module itself.
4 Remove the Power Supply Module from the system.
At this point there should be no cords connected to the
front of the Power Supp!y Module.
Installing the Control Unit 2-67