AT&T MERLIN LEGEND Release 3.1 Installation Manual page 209

Testing the System
6 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.
7 Hang up the handset to leave test mode.
Testing MLX Display Telephones
While the MLX display telephone is in test mode, follow the steps below to test
the display buttons:
1 Press each fixed display button (Home, Menu, Inspct, and More).
The display should spell out these button labels.
2 Press the unlabeled display buttons.
The display should indicate
display button, 1 through 4.
Testing MLX Telephones with MFMs
You should test MLX telephones with MFMs for proper channel operation and
test the MFM circuitry for the TTR, the ring generator, and the Message light.
To test an MLX telephone with an MFM installed and configured as a T/R
adapter, follow the steps below:
1 Connect a working 2500-type single-line telephone with a Message light
to the MFM adapter (the 2500 telephone also must have a mechanical
ringer).
2 Pick up the handset and listen for dial tone. Dial
You should hear another dial tone.
3 Press any button.
This will deactivate the test tone.
4 Dial
You should hear a confirmation tone.
. Press the switchhook quickly.
Initializing and Testing the System
n , where n is the number of the
.
7–5