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
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
WARNING: Hazardous electrical voltages may be present if the following steps are not performed correctly.
1Before installing the Frequency Generator, make sure the power switch of the Power Supply Module is off.
2If there is an Auxiliary Power Unit, unplug it from the ac outlet and then unplug it from the front of the Power Supply Module.
3Unplug 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.
4Remove 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.
