AT&T CL2939 user manual If you select NEW Call First in Call List, Electronic equipment on this

Appendix

Troubleshooting

	•	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).
	•	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 8). The filter prevents
		noise and caller ID problems caused by DSL
		interference. Please contact your DSL service
		provider for more information about DSL filters.
	•	Make sure the area codes are set correctly in
		the telephone (see Set home area code on
		page 16 and Set local area code on page 16).
	•	Reset the telephone. See Common cure for
		electronic equipment on this page.
The telephone does	•	Make sure you subscribe to caller ID with call
not receive caller ID or		waiting features provided by the telephone
the telephone does not		service provider.
display caller ID during	•	The caller might not be calling from an area
call waiting.		that supports caller ID.
	•	Both your and the caller’s telephone service
		providers must use equipment compatible with
		caller ID service.
Common cure for	If the telephone is not responding normally, try
electronic equipment:	resetting the telephone. Do the following in the
	order listed:
	1.	Disconnect the telephone line cord from the
		telephone base.
	2.	Remove the batteries.
	3.	Wait a few minutes before connecting the
		telephone line cord to the telephone base.
	4.	Re-install the batteries.
	5.	Wait for the telephone to synchronize its
		connection. This might take up to one minute.

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