Instruction manual

Maintenance Console
9-2
Installation, SPM, Maintenance, and Troubleshooting Supplement
4400-Series Telephones Test 9
Use the following steps to check if the LEDs, ringer, buttons, switchhook, and
display are working.
1. Pick up the handset.
2. When you hear the dial tone, press *00 (the feature access code).
The telephone enters test mode. For some tests, this means the LEDs turn
on; for others, it means the telephone starts ringing.
■ This test connects a test tone to the B-channel and sends a repeated
ring burst to the telephone.
■ On 4400, 4400D, and 4406D+ telephones, and telephones with a DSS
attached, all LEDs light and the telephone rings throughout the test.
■ On 4412D+, 4424D+, and 4424LD+ telephones, the left-most column
of feature buttons that have associated LEDs light and the telephone
rings periodically.
To switch to another column of feature buttons that have associated
LEDs, press a feature button in the column you want to select.
3. Press each line/feature button (two LEDs each).
The first press turns the red and green LEDs off. Subsequent presses
should toggle the red and green LEDs on and off.
4. Press each fixed feature button that has an LED (Mute, and Speaker).
Each LED should toggle on and off.
5. Press each fixed-feature button or line/feature button that does not have an
LED, and each dialpad button.
Mute and Speaker LEDs may not toggle consistently because
they are managed by the control unit and the telephone.