AT&T Trimline 240 - Manual (Page 5)

2
Battery Installation
This telephone requires three AA alkaline batteries
in order for Caller ID, Memory, and the New Call
light to work.
NOTE: This telephone retains memory without
charged batteries for 5 minutes. If battery power
is lost for more than 5 minutes, the call history,
memory numbers and all feature settings will
be lost.
1 Press on battery
compartment tab
to open.
INSTALLATION
2 Install three AA
alkaline batteries
(not included)
in the compartment
as shown, and
replace the cover.
Battery compartment
cover
Battery
compartment
tab
0240_Book_1ATTa_rev 3/25/02 9:27 AM Page 2