AT&T MERLIN Plus System Manual page 186

SYMPTOM: A voice terminal rings constantly.
Possible Cause 1: Voice terminal T/P switch isn't in the center position.
D This
O
Check T/P switch position.
SYMPTOM: All voice terminal lights are out; none has a dial tone.
Possible Cause 1: Control unit is not receiving power.
Do This
Set the control unit power
switch to Off and then back
to On. Doing so resets the
control unit.
Possible Cause 2: Switch-controlled power outlet.
Do This
Make sure the control unit
is not plugged into an outlet
controlled by a wall switch.
If
It is set at either T or P
The T/P switch is in the
center position
If
The green power light on
the control unit is on and
the trouble remains
The green power light is on
and the trouble is gone
The green power light is off
The red warning light on
the control unit is on
If
The control unit is not
plugged into a switch-
controlled outlset
Troubleshooting Procedures
Then
Slide it to the center
position
Your voice terminal is
faulty. Unplug it from the
modular jack and contact
your equipment supplier for
assistance.
Then
Call your equipment supplier
for assistance.
The problem was corrected
when you reset the control
unit.
Go to Possible Cause 3.
Go to Possible Cause 4.
Then
Go to Possible Cause 3.
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