Testing The Power Supply To A Telephone - Nortel Modular ICS 4.0 Manual

202 / Troubleshooting
You should hear page tone through the telephone speaker at
the maximum volume. The volume returns to its previous
setting when you end the test.
Pressing any button ends the test.
ƒ°‚fi

Testing the power supply to a telephone

1. Press
display reads Power test.
2. Press TEST or
test.
You should see all the indicators on the telephone go on and
hear ringing at maximum volume. When the test has ended, the
display should briefly show Power OK.
The test lasts for five seconds or until you press a button.
Modular ICS 4.0 System Coordinator Guide
, then
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to go ahead with a power supply
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P0881591 Issue 01