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Troubleshooting
Visual Power Indicators
The 2420 telephone display provides visual indication whether the module has power. To view the power status,
select the Options softkey from the 2420 telephone Home screen, and then select the Self Test feature button.
"-" indicates that the module is not receiving power or is not operating properly. "1" indicates that a single module is
receiving power and is operating properly. "2" indicates that two modules are receiving power and are operating
properly.
Resolving Problems
If the module is not receiving power or you do not receive dial tone, refer to the following information to resolve the
problem.
PROBLEM: MODULE DOES NOT HAVE POWER
1
Verify that all cords are securely connected at both ends.
2
Verify that the line cord connecting the auxiliary supply to the telephone is an 8-wire cord.
3
Verify that the 20-type stand is connected to the 2420 telephone.
PROBLEM: THE MODULE DOES NOT HAVE DIAL TONE
1
Verify that the module has power. (Check the visual indicator on the telephone display.)
2
Verify that all cords on the module, the 20-type stand, and the auxiliary power supply are securely connected
at both ends.
3
Verify that the switches on the module are set correctly. For more information, refer to the 20-Type Stand,
200-Type Module Analog (U.S.) Adjunct Interface, and 201-Type Module Recorder Interface Installation and
Safety Instructions (555-233-132).
4
Check with your system manager to make certain that the 2420 telephone has been administered correctly.
5
Connect the affected module with another 2420 telephone that has a working module. If the module being
tested still does not work, it is faulty.
If the module being tested works with the other telephone, try the working module taken from the other
telephone and connect it to the telephone experiencing the problem. If this module does not work, the
telephone is faulty.
3
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