Appendix

Troubleshooting

My caller ID features •

Caller ID is a subscription service. You must

are not working

subscribe to this service from your telephone service

properly

provider for this feature to work on your telephone.

The caller might not be calling from an area that

 

supports caller ID.

Both your and the caller’s telephone service

 

providers must use equipment compatible with

 

caller ID service.

Make sure you select ALL CALLS in CALL LOG (see

 

Feature summary on page 15) to set the telephone

 

to record caller ID information in the call history.

If you select NEW CALL FIRST in CALL LIST ORDER,

 

the telephone first shows the new (unreviewed)

 

caller ID entries then entries starting with the most

 

recent call in the call history. If you select BY TIME,

 

the telephone shows the caller ID entries starting

 

with the most recent call in the call history (see

 

Feature summary on page 15).

Make sure the area codes are set correctly in the

 

telephone (see Set home area code on page 19

 

and Set local area code on page 19).

Reset the telephone. See Common cure for

 

electronic equipment on page 58.

If you subscribe to high-speed Internet service

 

(digital subscriber line - DSL) through your

 

telephone line, you must install a DSL filter between

 

the telephone line cord and the telephone wall jack

 

(see Telephone installation on page 7). 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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Image 61
AT&T CL4939 user manual If you select NEW Call First in Call List Order, Feature summary on, Set local area code on