AT&T DLP73450 Complete User's Manual page 160

Appendix
Troubleshooting
Do not install this phone near a microwave oven or on the same electrical
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outlet. You may experience decreased performance while the microwave
oven is operating.
If your phone is plugged in with a modem or a surge protector, plug the
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phone (or modem/surge protector) into a different location. If this doesn't
solve the problem, relocate your phone or modem farther apart from one
another, or use a different surge protector.
Relocate your phone to a higher location. The phone may have better
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reception when installed in a high area.
Disconnect the telephone base from the telephone wall jack and plug in a
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working telephone. If the other phones in your home are having the same
problem, the problem is in your wiring or telephone service. Contact your
telephone service provider (charges may apply).
The charge light is off.
Make sure the power and line cords are plugged in correctly and securely.
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Unplug the electrical power. Wait for 15 seconds, then plug it back in. Allow up
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to one minute for the handset and telephone base to reset.
Clean the handset and telephone base charging contacts each month using
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a pencil eraser or cloth.
My caller ID isn't working.
Caller ID is a subscription service. You must subscribe to this service from
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your telephone service provider for this feature to work on your phone.
The caller may not be calling from an area that supports caller ID.
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Both your telephone service provider and your caller's telephone service
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provider must use caller ID compatible equipment.
If you subscribe to high-speed Internet service (digital subscriber line - DSL)
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through your telephone lines, you must install a DSL filter between the
telephone line cord and the telephone wall jack (see page 13). The filter
prevents noise and caller ID problems caused by DSL interference. Please
contact your DSL service provider for more information about DSL filters.
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