Copyright © 1991 AT&T

AT&T 518-455-330

All Rights Reserved

Issue 1

Printed in U.S.A.

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.

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AT&T II Copyright 1991 AT&T All Rights Reserved Issue November, Warranty, Ordering Information, Support Telephone Numbers

II specifications

AT&T II, a pivotal case in the landscape of telecommunications regulation, emerged from the expansive antitrust actions against the American Telephone and Telegraph Company (AT&T). Following World War II, AT&T had established itself as a telecommunications behemoth, monopolizing the market. The ramifications of this dominance spurred a significant shift in regulatory measures, leading to the dissolution of the Bell System in 1984, which consisted of AT&T and its regional operating companies.

One key feature of AT&T II is its emphasis on promoting competition in the telecommunications sector. The court's decision aimed to dismantle the monopolistic practices that had stifled innovation and restricted consumer choice. By encouraging competition among various service providers, the ruling paved the way for an environment where new technologies could flourish.

The technologies that emerged post-AT&T II significantly transformed the telecommunications landscape. The introduction of new digital switching systems allowed for improved call quality and increased network efficiency. The evolution of fiber-optic technology also played a crucial role, enabling faster transmission speeds and greater data capacity. Moreover, innovative services, such as mobile telephony and broadband internet, proliferated as competition increased.

Another characteristic of AT&T II is its focus on accessibility and consumer protection. The ruling mandated that telecommunications services be available to a broader swath of the population, ensuring that underserved communities had access to essential communication services. This shift not only democratized access but also laid the groundwork for the modern internet revolution, fostering the growth of the digital economy.

The impact of AT&T II can also be seen in the regulatory frameworks that followed. The Federal Communications Commission (FCC) adopted policies aimed at enhancing market transparency and ensuring fair practices among competitors. These regulatory changes helped to create a more equitable playing field, allowing smaller companies to compete against established giants.

In summary, AT&T II marked a turning point in telecommunications history, characterized by a focus on competition, technological advancements, and consumer protection. The dissolution of AT&T's monopoly allowed for the rapid evolution of technology and services, ultimately benefiting consumers and fostering an environment ripe for innovation. This ruling not only redefined the telecommunications industry but also set a precedent for how markets are regulated in the United States.