telecommunication

Table of Contents

References & Edit History Quick Facts & Related Topics

Images & Videos

Block diagram of a digital telecommunications system.

Basic steps in analog-to-digital conversionAn analog signal is sampled at regular intervals. The amplitude at each interval is quantized, or assigned a value, and the values are mapped into a series of binary digits, or bits. The information is transmitted as a digital signal to the receiver, where it is decoded and the analog signal reconstituted.

digital signal modulation

Analog multiplexing, as employed in the North American telephone systemIn frequency-division multiplexing (FDM), 12 separate voice signals, each of 4-kilohertz bandwidth, are modulated onto carrier waves in the 60–108-kilohertz range. These modulated signals are combined to form a single complex group signal. Groups are further combined to form a hierarchy of increasing bandwidth and voice-carrying capacity.

Digital multiplexing, as employed in the North American telephone systemIn time-division multiplexing (TDM), 24 digitized voice signals, each at 64 kilobits per second, are assigned successive time slots in a 1.544-megabits-per-second signal. Combined signals are further combined to form data streams of increasing bit-rate and voice-carrying capacity.

Learn how solar flares can affect satellites, rockets, telecommunications systems and activity on the surface of the Earth

How the telephone was invented

For Students

telecommunication summary

Read Next

Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news

Who Invented the Internet?

Human backs in auditorium on shooting of television talk-show

Why Do Television Shows Use Laugh Tracks?

Screen with https for internet security. (encryption, privacy, websites)

Inventions that Helped Shape How We Interact with Knowledge and Information

multiple exposures, depiction of deep web, internet

What’s the Difference Between the Deep Web and the Dark Web?

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

Discover

Martin Luther King, Jr.

Why We Celebrate MLK Day

Alcoholic beverages bottles at Host 2013, international exhibition of the hospitality industry on OCTOBER 18, 2013 in Milan.

Why Is Alcohol Measured by Proof?

Hemp (Cannabis sativa).

9 Mind-Altering Plants

Malayan Leaf Frog - Megophrys nasuta

9 Animals That Look Like Leaves

jeans, denim, pants, clothing

Why Do We Say “A Pair of Pants”?

Indian hijras participate in a religious procession in Gandhinagar, India, some 30 kilometers from Ahmedabad, on March 22, 2017. Hijra is a term used in South Asia which refers to transgender individuals who are born male. (gender identity, gender expression)

6 Cultures That Recognize More than Two Genders

Secret Service Agent Listens To Earpiece

Secret Service Code Names of 11 U.S. Presidents

telecommunication: Media

Videos

Learn how solar flares can affect satellites, rockets, telecommunications systems and activity on the surface of the Earth

Learn how solar flares can affect satellites, rockets, telecommunications systems and activity on the surface of the Earth

An overview of solar flares.

Video: University College Cork, Ireland (A Britannica Publishing Partner)

How the telephone was invented

How the telephone was invented

Overview of the invention of the telephone, with a focus on the work by Alexander...

Video: Contunico © ZDF Studios GmbH, Mainz; Thumbnail Gary Todd; © Georgios Kollidas/Dreamstime.com

Images

Block diagram of a digital telecommunications system.

Block diagram of a digital telecommunications system.

Encyclopædia Britannica, Inc.

Basic steps in analog-to-digital conversionAn analog signal is sampled at regular intervals. The amplitude at each interval is quantized, or assigned a value, and the values are mapped into a series of binary digits, or bits. The information is transmitted as a digital signal to the receiver, where it is decoded and the analog signal reconstituted.

Basic steps in analog-to-digital conversionAn...

Encyclopædia Britannica, Inc.

digital signal modulation

digital signal modulation

A digital signal, representing the binary digits 0 and 1 by a series of on and off...

Encyclopædia Britannica, Inc.

Analog multiplexing, as employed in the North American telephone systemIn frequency-division multiplexing (FDM), 12 separate voice signals, each of 4-kilohertz bandwidth, are modulated onto carrier waves in the 60–108-kilohertz range. These modulated signals are combined to form a single complex group signal. Groups are further combined to form a hierarchy of increasing bandwidth and voice-carrying capacity.

Analog multiplexing, as employed in the North...

Encyclopædia Britannica, Inc.

Digital multiplexing, as employed in the North American telephone systemIn time-division multiplexing (TDM), 24 digitized voice signals, each at 64 kilobits per second, are assigned successive time slots in a 1.544-megabits-per-second signal. Combined signals are further combined to form data streams of increasing bit-rate and voice-carrying capacity.

Digital multiplexing, as employed in the North...

Encyclopædia Britannica, Inc.

VIEW MORE in these related Britannica articles: