Premises Equipment

Figure 1-3 shows an equipment controller and MLS- and MLC-model telephones connected to it. A brief description of each component follows the figure.

EQUIPMENT CONTROLLER (covers not shown)

206Module

Circuit Breakers

Primary

 

Expansion

 

Carrier

Main Circuit

Carrier

Main Circuit

 

Breaker

 

Breaker

206Modules

400Modules

Primary

Expansion

 

Processor

 

Processor Module

Module

 

Line Jacks

Line Jacks

 

Power Indicators

 

 

(LEDs)

PAGE Jack

 

 

 

Extension Jacks

SMDR Jack

 

(206 modules only)

 

 

MUSIC ON HOLD Jack

 

 

(for RCA phono plug)

 

 

 

Expansion

 

 

Cable

Power Indicators

 

 

(LEDs)

PHONES

MLS-34D

Display Phone

MLS-12D

Display Phone

MLS-12

Phone

MLS-6

Phone

Wall Jacks

MLC-6

Cordless Phone

Figure 1-3. Equipment Controller and MLS/MLC-Model Telephones

Overview 1-7

Page 18
Image 18
AT&T II manual Premises Equipment, Equipment Controller and MLS/MLC-Model Telephones

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.