AT&T II manual 2Specifications

Models: II

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PAGE Jack

Draws current on inner wire pair

 

Provides contact closure on outer wire pair

 

600 ohm impedance

 

 

 

SMDR Jack

1200 baud

 

8 data bits, 2 stop bits

 

No parity

 

355A or 355AF adapter required

 

 

 

Environmental

Mount on a wall at least 2 feet (0.6 meters) from the floor (wall mounting required)

Requirements—

Locate within 5 feet (1.5 meters) of the network interface jacks and an electrical outlet not

Equipment

 

controlled by a switch, using supplied 7-foot (2.1-meter) cords

Controller

Mount the Expansion Carrier at least 6“ and not more than 24” away from the Primary Carrier

 

 

Operating temperature 32° to +104°F (0° to +40°C), not in direct sunlight

 

Humidity 15%–90%, noncondensing

 

For proper ventilation and easy replacement of modules, provide at least 6” (2.34cm) clearance

 

 

at the top and sides, and 2 feet (0.6 meters) at the front and bottom of the control unit.

 

Locate in an area free of excess moisture, corrosive gases, dust, and chemicals

 

 

Electrical

10 Watts (35 BTUs/hour) per 400 module, normal and peak power consumption

Specifications

65 Watts (225 BTUs/hour) per 206 module during normal operation

 

100 Watts (350 BTUs/hour) per 206 module during peak power consumption

 

4 Amps peak current at full controller capacity (processor modules and four 206 modules)

 

4-day memory backup (96 hours)

 

 

Electrical

90–130 VAC, 50–60 Hz, 3-prong outlet separate ground, separately fused at 15 Amps

Requirements

Outlet must not be controlled by an on/off switch

 

Grounding to comply with Underwriters Laboratories (UL) 1459:

 

 

A. An insulated rounding conductor that is not smaller in size and equivalent in insulation

 

 

material and thickness to the grounded and ungrounded branch circuit supply

 

 

conductors, except that it is green with or without one or more yellow stripes, is to be

 

 

installed as part of the circuit that supplies the premises equipment.

 

 

B. The grounding conductor mentioned in item A is to be connected to ground at the service

 

 

equipment.

 

 

C. The attachment-plug receptacles in the vicinity of the premises equipment are all to be of

 

 

a grounding type, and the grounding conductors serving these receptacles are to be

 

 

connected to earth ground at the service equipment.

 

Requirements for Installation of a telephone or other standard (tip/ring) device in another building requires the

Out-of-Building

following In-Range Out-of-Building (IROB) protectors to protect the controller and device from

Extensions

electrical surges:

 

 

 

MLS-model telephone: two AT&T 503A1 or 504A1 protectors

 

Standard device: one AT&T 503A1 or 504A1 protector plus one carbon block protector

 

 

Wiring

MLS-model phones: AT&T SYSTIMAX™ or at least 2-pair (4-wire) star (“home run” not “loop”)

 

Other standard telecommunications equipment (single-line phones, fax machines, answering

 

 

machines, etc.): 1-pair (2-wire) mounting cords (AT&T D2R mounting cords recommended)

 

Bridging adapter: AT&T 267F2

 

Range: 1,000 feet (305 meters) for MLS phones; 3,000 feet (915 meters) for standard devices

 

 

 

Primary

68000 microprocessor, 64K RAM, 256K ROM

Processor

 

 

Module

 

 

Expansion

12 megahertz, 128K RAM, 64K ROM

Processor

 

 

Module

 

 

D-2Specifications

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AT&T II manual 2Specifications

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.