AT&T CL4939 user manual Telephone installation

Getting started

Telephone installation

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.

1.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.

Handset

Coiled handset cord

2.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.

3.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.

Electrical outlet	Telephone wall jack
not controlled by
a wall switch

Telephone line cord

DSL filter (not included) is required if you have DSL high-speed Internet service.