AT&T CL4939 - Manual (Page 19)

13
Getting started
Installation options
Plug the small end of the power adapter into the POWER jack on the back
of the telephone base. Plug the large end into an electrical outlet not
controlled by a wall switch.
7.
Rotate the top of the display up or down to adjust the angle of the screen
for maximum visibility. 8.
Telephone line cord
DSL filter (not included)
is required if you have
DSL high-speed Internet
service.
Telephone wall jack Electrical outlet
not controlled by
a wall switch