Installation guide

Symptom:
Lights behave abnormally on a 34-button deluxe voice terminal with Hands-Free
Unit. This may occur at system installation or after a power failure.
Possible Cause
Too much start-up load is being
placed on the control unit.
TROUBLE ON ONE TELEPHONE
Accessories
Recommended Action
Add a Voice Terminal Power Supply, or, each time
the power fails or the control unit is reset, do the
following:
a.
Unplug the HFU.
b. Unplug the control unit ac power cord, then
plug it in again. (For Model 820, set the
On/Off switch to Off, then to On.)
c.
Plug in the HFU.
A6-3