Installation guide

TROUBLE ON SEVERAL TELEPHONES
Lights
Voice terminal lights are dim, especially when the voice terminal T/P switch is in
Symptom:
the T position (Model 820 only).
Possible Cause
The control unit is not supplying
enough power. You may need an
Auxiliary Power Unit or a Voice
Terminal Power Supply.
Recommended Action
To supply more power to 34-button deluxe voice
terminals, use Voice Terminal Power Supplies.
Follow these steps to see if the system requires an
Auxiliary Power Unit:
1.
2.
3.
Count how many voice terminals are
connected to the control unit. Do not count
34-button deluxe voice terminals or voice
terminals that have a Voice Terminal Power
Supply.
Count how many accessories (such as Hands-
Free Units) and 34-button deluxe voice
terminals are connected to the control unit and
add the two numbers together. Do not count
voice terminals that have a Voice Terminal
Power Supply.
Add the numbers from steps 1 and 2. If the
total exceeds 28, an Auxiliary Power Unit is
recommended. If the problem occurs only at
34-button deluxe voice terminals, adding Voice
Terminal Power Supplies at those voice
terminals instead of an Auxiliary Power Unit is
recommended.
B4-3