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MLX Telephone Tests
5 Press each fixed-feature button that does not have an LED (Transfer,
Conf, Drop, and Hold) and each dialpad button.
When you press each one of these buttons, the
Message
LED should toggle
on and off.
6 Press the fixed-feature buttons and the dialpad buttons in the order
shown below to turn on all the LEDs.
a
Volume down
b
Volume up
c
Transfer
d
Conf
e
Drop
f Hold
g Dial
123456789*0#
The LEDs should toggle on and off.
7 If the MLX telephone does not have a display, hang up and go to Step 9;
if it does, continue with the next step.
8 To test an MLX display, press each display button.
Each button name should display in the upper-left corner as described in
Table 3-2 below.
9 If any of these tests fail, replace the MLX telephone.
10 Test the Multi-Function Module (MFM) if present.
a Connect a single-line telephone to the MFM.
b Pick up the handset on the single-line telephone.
c When you hear the system access or intercom dial tone, dial
*09
from the
single-line telephone.
This connects the diagnostic test tone to the B-channel.
d Dial
123456789*0#;
wait for silence, and then quickly press the
Recall
button to perform a switchhook flash.
You should
e Hang up.
You should
f Dial #54 to
hear a confirmation tone (three beeps).
hear a ring burst, and the Message LED should turn on.
turn off the Message LED and resume normal operations.
Telephone Problems 3–7