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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.
PROBLEM: THE 2420 TELEPHONE DOES NOT HAVE DIAL TONE
1 Make sure the analog equipment attached to your 2420 telephone is on-hook. The analog equipment
attached to your 2420 telephone may be off-hook because it does not detect the “disconnect” signal sent from
the 200-type module. You must manually turn off (that is, place on-hook) your analog equipment.
2 If there is still no dial tone, make sure the handset and line cords at your 2420 telephone are securely
connected at both ends.
3 If there is still no dial tone, check with your system manager to verify that your telephone is administered
correctly.
4 If the telephone is administered correctly but there is still not dial tone, remove power. Remove the module
and 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). If the 2420 telephone, without the
module, has dial tone, connect the module to another telephone.
a. If the module works in the new telephone, the 2420 telephone to which the module was originally
connected is faulty.
b. If the new 2420 telephone, after the module has been connected, does not work, the module is faulty.
5 If the original 2420 telephone, without the module, still does not work, find a working 2420 telephone. Unplug
this telephone from its modular wall jack. Plug your 2420 telephone into that jack and verify that it gets dial
tone.
6 If the original 2420 telephone still does not work, plug the working 2420 telephone into your modular wall jack.
If the working 2420 telephone has dial tone, your own telephone is faulty. See your system manager.