AT&T MERLIN LEGEND Release 2.0 Installation Section page 302

Initializing and Testing the System
4. To test a fixed-feature button with one LED, press the button.
The Feature and HFAl LEDs should turn off. The first press of
Speaker should turn off the Mute LED. The second press of Speaker
should turn off the Speaker LED.
NOTE:
If Mute is pressed before Speaker, the Mute LED cannot
be turned off; it will wink.
The Mute and Speaker LEDs remain steady during test
mode.
The pressing of the Mute button is processed within the
telephone.
When the telephone test is originated from Speaker, every
second press of the Mute button causes the Mute LED to
flash off momentarily.
Also, both the Mute and Speaker LEDs may occasionally
remain on after disconnecting with Speaker.
Press the fixed-feature buttons repeatedly to toggle the
LEDs on and off.
5. To test the red Message light, press a fixed-feature button without an
LED (such as Transfer, Conf, or Drop ) or any dialpad button.
The Message light should turn off.
6. Verify that all features are working properly.
7. If any features are not working properly, verify the system
programming.
Testing the System
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