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Index L-carrier

The Transcontinental Cable System or L-carrier system was developed by AT&T to create a high capacity transmission facility using coaxial cable, a fairly new medium for HF to RF signal transmission invented in 1927 by Lloyd Espenschied of Bell Telephone Laboratories for long distance communications. [1]

20 relations: AT&T, AT&T Communications, Bell System, Coaxial cable, Cold War, Command and control, Emergency power system, Fiber-optic communication, Frequency-division multiplexing, Herman Affel, Landline, Lloyd Espenschied, Microwave transmission, NTSC, Nuclear warfare, Repeater, Single-sideband modulation, Television network, United States, 12-channel carrier system.


AT&T Inc. is an American multinational conglomerate holding company headquartered at Whitacre Tower in Downtown Dallas, Texas.

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AT&T Communications

AT&T Communications, Inc., was a division of the AT&T Corporation that, through 23 subsidiaries, provided interexchange carrier and long distance telephone services.

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Bell System

The Bell System was the system of companies, led by the Bell Telephone Company and later by AT&T, which provided telephone services to much of the United States and Canada from 1877 to 1984, at various times as a monopoly.

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Coaxial cable

Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.

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Cold War

The Cold War was a state of geopolitical tension after World War II between powers in the Eastern Bloc (the Soviet Union and its satellite states) and powers in the Western Bloc (the United States, its NATO allies and others).

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Command and control

Command and control or C2 is a "set of organizational and technical attributes and processes...

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Emergency power system

An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply.

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Fiber-optic communication

Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber.

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Frequency-division multiplexing

In telecommunications, frequency-division multiplexing (FDM) is a technique by which the total bandwidth available in a communication medium is divided into a series of non-overlapping frequency bands, each of which is used to carry a separate signal.

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Herman Affel

Herman Andrew Affel (August 4, 1893 – October 13, 1972) was an American electrical engineer who invented the modern coaxial cable.

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A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) is a phone that uses a metal wire or optical fiber telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission.

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Lloyd Espenschied

Lloyd Espenschied (27 April 1889 – June 1, 1986) was an American electrical engineer who invented the modern coaxial cable with Herman Andrew Affel.

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Microwave transmission

Microwave transmission is the transmission of information or energy by microwave radio waves.

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NTSC, named after the National Television System Committee,National Television System Committee (1951–1953),, 17 v. illus., diagrs., tables.

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Nuclear warfare

Nuclear warfare (sometimes atomic warfare or thermonuclear warfare) is a military conflict or political strategy in which nuclear weaponry is used to inflict damage on the enemy.

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In telecommunications, a repeater is an electronic device that receives a signal and retransmits it.

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Single-sideband modulation

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.

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Television network

A television network is a telecommunications network for distribution of television program content, whereby a central operation provides programming to many television stations or pay television providers.

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United States

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.

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12-channel carrier system

In the U.S. telephone network, the 12-channel carrier system was an early frequency-division multiplexing system standard, used to carry multiple telephone calls on a single twisted pair of wires, mostly for short to medium distances.

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Redirects here:

L carrier, L-cxr.


[1] https://en.wikipedia.org/wiki/L-carrier

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