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Copyright © 1991 AT&T
All Rights Reserved
Printed in U.S.A.
AT&T 518-455-330
Issue 1
November 1991
Notice
Every effort was made to ensure that the information in this book was complete and accurate at the
time of printing. However, information is subject to change.
Federal Communications Commission (FCC) Interference Notice
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of FCC rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which case
the user will have to correct the interference at his or her own expense. For additional FCC
interference, registration, and repair information, see Appendix E of this book.
Trademarks
MLS-34D, MLS-12D, MLS-12, MLS-6, MLC-6, and SYSTIMAX are trademarks of AT&T.
PARTNER, Magic on Hold, MERLIN, and PagePac6 are registered trademarks of AT&T.
ESSX is a registered trademark of Bell South Corporation.
CENTRON is a registered trademark of U S West, Inc.
Plexar is a registered trademark of Southwestern Bell Telephone.
Warranty
AT&T provides a limited warranty to this product. Refer to “AT&T Limited Warranty and Limitation of
Liability” in Appendix C.
Ordering Information
The order number for this book is 518-455-330. To order copies of this book, call 1 800 432-6600 in
the U.S. and 1 800 255-1242 in Canada. For more information on how to order this and other system
reference materials, see “Reference Materials” in “About This Guide.” For information on ordering
replacement parts, accessories, and other compatible equipment, refer to “Product Ordering
Information” in Appendix C.
Support Telephone Numbers
In the U.S., AT&T provides a toll-free customer helpline 24 hours a day. Call the AT&T Helpline at
1 800 628-2888 if you need assistance when installing, programming, or using your premises
equipment.
For assistance in Canada, contact your local AT&T authorized dealer.