AT&T TRIMLINE TR1909 - Manual (Page 5)

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Product overview
This AT&T TR1909 Trimline® telephone with caller ID/call waiting
can be used either in desktop or wall mount position, and requires
four AA alkaline batteries (not included) for all functions. The
telephone can still operate with limited features when there are no
batteries installed.
The TR1909 telephone features a 13-number memory for fast
dialing and has a call log which can store up to 80 additional
numbers
with names . It also has a caller ID feature which supports
caller ID with call waiting service. (Caller ID services are subscriber
services available from your telephone service providers for a fee.)
This user’s manual contains detailed instructions for installing and
operating your AT&T TR1909 Trimline® telephone with caller ID/call
waiting. Please follow the instructions carefully.
Getting started