AT&T Corded Phone With Answering System CL4940 User's Manual | Page 8

3

Getting started

Installation

STOP!

Install the telephone base close to a telephone jack and a power outlet not 
controlled by a wall switch. The telephone base can be placed on a flat surface 
or vertically mounted on the wall (see pages 6-9).

If you subscribe to high-speed Internet service (DSL - digital subscriber line) through 
your telephone line, you must install a DSL filter between the telephone line cord 
and the telephone wall jack (see page 4). The filter prevents noise and caller ID 
problems caused by DSL interference. Please contact your DSL service provider for 
more information about DSL filters.

Your product may be shipped with a protective sticker covering the telephone 
base display, remove it before use.

For customer service or product information, visit our website at  

www.telephones.att.com or call 1 (800) 222-3111. In Canada, dial 

1 (866) 288-4268.

Avoid placing the telephone base too close to:

Communication devices such as television sets, VCRs, or cordless telephones.
Excessive heat sources.
Noise sources such as a window with traffic outside, motors, microwave 
ovens, refrigerators, or fluorescent lighting.
Excessive dust sources such as a workshop or garage.
Excessive moisture.
Extremely low temperature.
Mechanical vibration or shock such as on top of a washing machine or 
work bench.

•
•
•

•
•
•
•

You must install the 
power adapter before 
using the telephone.

See pages 4-5 for  
easy instructions.