All Telephones Dead: No Dial Tone Or Lights; Multiple Telephones Dead: No Dial Tone Or Lights - Avaya PARTNER Advanced Communications System Installation And Use Manual

If the green LEDs on the modules are out, go to Possible Cause 2 in "All Telephones Dead: No
Dial Tone or Lights" below.
If any green LEDs on the modules are flashing, call the helpline number listed on the front,
inside cover.
CAUTION:
The settings retained in the 1600 DSL module's flash memory become the active settings
when Restore Programming has been run or when the power is turned off and back on.

All Telephones Dead: No Dial Tone or Lights

Possible Cause 1: Control unit is not receiving power.
What to do: Make sure the control unit's power cord is plugged securely into the wall outlet. Also
make sure the on/off switch is in the "ON" position ("O") if you have a five-slot carrier.
If the green LEDs on the modules are lit and the trouble is gone, the problem is corrected.
If the green LEDs on the modules are lit but the trouble remains, call the helpline number listed
on the front, inside cover.
If the green LEDs on the modules are out, go to Possible Cause 2.
If any green LEDs on the modules are flashing, call the helpline number listed on the front,
inside cover.
Possible Cause 2: The power outlet is faulty.
What to do: Test the outlet by plugging in an appliance, like a lamp or radio.
If the appliance does not work, the outlet is faulty. If possible, plug the control unit into a
different outlet. Then check the fuse box or call an electrician.
If the appliance works, call the helpline number listed on the front, inside cover.

Multiple Telephones Dead: No Dial Tone or Lights

Possible Cause 1: The LED on one system module is out.
What to do: If the green LED on the front of a module is out, try reseating the module in the control
unit.
If the LED lights, the problem is corrected.
If the problem remains, call the helpline number listed on the front, inside cover.
Troubleshooting
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System Problems
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