AT&T CL2939 - Manual (Page 4)

3
Telephone installation
Plug one end of the coiled handset cord into the handset jack on the left
side of the telephone base. Plug the other end into the handset and hang up. .
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. The filter prevents noise and
caller ID problems caused by DSL interference. Please contact your DSL service
provider for more information about DSL filters.
Follow the steps below to install the telephone.
Plug one end of the telephone line cord into the TEL LINE jack on the back
of the telephone base. Plug the other end of the telephone line cord into a
telephone wall jack.
2.
Lift the handset or press SPEAKER to check for a dial tone.
Rotate the top of the display up or down to adjust the angle of the screen
for maximum visibility.
3.
.
Handset
Coiled handset cord
DSL filter (not included)
is required if you have DSL
high-speed Internet service.
Telephone wall jack