AT&T CL4939 User Manual page 4

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 (page 7). 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
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 the washing machine or
work bench.
STOP!
or call
.
1 (800) 222-3111
. In Canada, dial