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Wikipedia about telecommunications

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Etymology

Basic elements

A telecommunication system consists of three basic elements:

  • a transmitter that takes information and converts it to a signal;
  • a transmission medium that carries the signal; and,
  • a receiver that receives the signal and converts it back into usable information.

For example, in a radio broadcast the broadcast tower is the transmitter, free space is the transmission medium and the radio is the receiver. Often telecommunication systems are two-way with a single device acting as both a transmitter and receiver or transceiver. For example, a mobile phone is a transceiver.

Telecommunication over a telephone line is called point-to-point communication because it is between one transmitter and one receiver. Telecommunication through radio broadcasts is called broadcast communication because it is between one powerful transmitter and numerous receivers.

Analogue or digital

Signals can be either analogue or digital. In an analogue signal, the signal is varied continuously with respect to the information. In a digital signal, the information is encoded as a set of discrete values (for example ones and zeros). During transmission the information contained in analogue signals will be degraded by noise. Conversely, unless the noise exceeds a certain threshold, the information contained in digital signals will remain intact. This noise resistance represents a key advantage of digital signals over analogue signals.

Networks

A collection of transmitters, receivers or transceivers that communicate with each other is known as a network. Digital networks may consist of one or more routers that transmit information to the correct users. An analogue network may consist of one or more switches that establish a connection between two or more users. For both types of network, repeaters may be necessary to amplify or recreate the signal when it is being transmitted over long distances. This is to combat attenuation that can render the signal indistinguishable from noise.ATIS Telecom Glossary 2000, ATIS Committee T1A1 Performance and Signal Processing (approved by the American National Standards Institute), 28 February 2001.

Channels

A channel is a division in a transmission medium so that it can be used to send multiple streams of information. For example, a radio station may broadcast at 96.1 MHz while another radio station may broadcast at 94.5 MHz. In this case, the medium has been divided by frequency and each channel has received a separate frequency to broadcast on. Alternatively, one could allocate each channel a recurring segment of time over which to broadcastthis is known as time-division multiplexing and is sometimes used in digital communication.

Search results for Telecommunications

Telecommunications : FUJITSU

This is the information of Fujitsu telecommunication solutions for global market place: Mobile Networks, Wireless networks, 3G, Broadband, Optical networks, ...www.fujitsu.com/global/services/telecom/

telecommunication: Definition from Answers.com

telecommunication n. The science and technology of communication at a distance by electronic transmission of ... Accounting Dictionary: Telecommunications ...www.answers.com/topic/telecommunication

Telecommunications Industry Association (TIA)

Trade organization for companies which provide communications and information technology products and services.www.tiaonline.org/

ADC Telecommunications

Provider of network equipment, software, and systems integration services.www.adc.com/

Department of Commerce Home Page - Telecommunications

Minority Telecommunications Development Program "Fact Sheet" ... Implementation of the Telecommunications Act of 1996. 3G Wireless ... Telecommunications Grants ...www.commerce.gov/telecommunications.html

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News about Telecommunications

Jacada Signs Material Services Agreement with Existing Telecommunications Customer

Centre Daily TimesJacada Ltd. (Nasdaq: JCDA), a leading provider of unified desktop and process optimization solutions for customer service operations, today announced that it has signed a material services agreement with an existing customer, a large telecommunications provider. Revenue from this contract will be recognized in future quarters.http://www.centredaily.com/business/technology/story/878326....

Customs contracts for WidePoint's MTEM

UPI WASHINGTON, Oct. 3 (UPI) -- WidePoint Corp. has been contracted to support the U.S. Customs and Border Protection Agency with telecommunications services.http://www.upi.com/Security_Industry/2008/10/03/Customs_cont...

Orange looks to go green

VNU Net via Yahoo! UK & Ireland NewsTelecommunications firm Orange will undertake a new program to asses its environmental impact.http://uk.news.yahoo.com/vdunet/20081004/ttc-orange-looks-to...

Craigslist founder criticizes telecoms for 'artificial' Net neutrality debate

CNETOnline classifieds site founder Craig Newmark would like to see more transparency in Washington, D.C., from politicians and telecommunications companies.http://news.cnet.com/8301-13578_3-10057749-38.html?part=rss&...

Examine the Telecommunications Infrastructure & Fixed Network Operators in Hong Kong

Business Wire via Yahoo! Finance DUBLIN, Ireland----Research and Markets has announced the addition of the "Hong Kong - Telecommunications Infrastructure & Fixed Network Operators" report to their offering.http://biz.yahoo.com/bw/081002/20081002005455.html?.v=1

News about Telecommunications

PCCW Halts Sale Of Stake In Unit

Wall Street JournalHONG KONG -- PCCW Ltd., Hong Kong's dominant fixed-line telephone operator, has dropped plans to sell a big stake in its media and telecommunications assets after receiving bids from private-equity buyers that weren't "sufficiently attractive ... http://online.wsj.com/article/SB122381417069126501.html

Cavalier Is Named Official Provider Of Communications To Dover Air ...

dBusinessNews.comRichmond - Cavalier, trusted provider of DSL and phone service, announces its contract with the United States Air Force to provide telecommunications services to Dover Air Force Base in Delaware. RICHMOND, VA -- Cavalier, a fast growing provider of ... http://kansas.dbusinessnews.com/shownews.php?newsid=168531&t...

Thailand's prime minister rules out resigning

PR InsideThe protesters regard Somchai as a proxy of deposed Prime Minister Thaksin Shinawatra, a former telecommunications billionaire who was ousted by a 2006 military coup for alleged corruption and misuse of power. Somchai is a brother-in-law of ... http://www.pr-inside.com/thailand-s-prime-minister-rules-out...

New impeachment complaint filed vs Arroyo

ABS-CBNArroyo of betrayal of public trust after she approved the National Broadband Network (NBN) telecommunications deal with China's ZTE Corp., saying that the deal was overpriced by at least $130M. Other grounds included in the complaint are: culpable ... http://www.abs-cbnnews.com/nation/10/13/08/new-impeachment-c...

ARAB BUSINESS SEARCH

Nashra USAType [All Categories] Accounting Advertising Agency Air Cargo And Package Air Conditioning Air Lines Alarm Systems Appraisals Arab Airlines Attorneys Automobiles Bakeries Banks Beauty Salons Book Stores Bridal Broadcasting / Video / Audio Butchers ... http://www.arabmedia.com/businesssearch.html?ArabMediaSessio...

Search results for Telecommunications

Telecommunications Magazine

Technology and business publication for communication professionals, covering service provider technologies and applications worldwide.http://www.telecommagazine.com/

Welcome to the WindomNet - Windom Telecommunications

Click on the above picture to go to the FTC website) Do you receive lots of junk email messages from people you don't know? It's no surprise if you do.http://www.windomnet.com/

University of North Dakota | Telecommunications

Telecommunications is located in the lower level of the Carnegie Building. Telecommunications Contact Information. Reach us at : Carnegie Building,http://www.telecom.und.edu/

International Telecommunication Union

Access to a wide range of materials on telecommunications and related topics . ITU Global View: A comprehensive view of current telecommunications infrastructure, projects, and ... http://www.itu.int/net/home/index.aspx

telecommunications Resources | TechRepublic

White papers, case studies, technical articles, and blog posts relating to telecommunications ... TechRepublic Resources. sort by: Relevance; Date; Popularity; Batch Converter Plug ... http://search.techrepublic.com.com/search/TELECOMMUNICATIONS...
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VARIOUS: Asia's telecommunications ...

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Coca-Cola Telecommunications Exclusive DistributorThe Coca-Cola Telecommunications exclusive distributor logo.MPEG 4 - Video

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Bangladeshis Delivering $500000 Worth Of Telecommunications Equipment.Apparently, these guys make about $6/month.Flash - Video

The International Telecommunication...

The International Telecommunication UnionBrief description of the Internatinoal Telecommunication Union: Main activities in the radiocommunication, standardization and development domains. Author: itutelecommunication...Flash - Video

Shawn Herrick - Excel Telecommunica...

Shawn Herrick - Excel TelecommunicationsNateCalima.com uploads a blast from the past! From the infamous "SacXL" now "SacGlobal" team. I hope this brings back many memories from Excel Telecommunications. Company: Excel...Flash - Video

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Emtec Incorporated Receives SCC Con...

Emtec Incorporated Receives SCC Contractor Pre-Qualification To...msmedia: 2.6 MB w:320px - h:240px

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nyse_101404_100k_1.asx

nyse_101404_100k_1.asxgrowth. Click on the links below to access a webcast of the events surrounding Hutchison Telecommunications International Limited's listing on the NYSE. Windows Media Player: 300k | 100k | 56k Real Pl...msmedia: 0 MB w:240px - h:180px

PTC 2005 - The Rebirth of the Pacif...

PTC 2005 - The Rebirth of the Pacific Telecommunications Council...PTC 2005 - The Rebirth of the Pacific Telecommunications Council Copyright 2005 University of Hawaii 1 hr 0 min 27 sec - Mar 15, 2005 The Pacific Telecommunication Conference (PTC) is the Pacific he...flash: 0 MB w:320px - h:240px

Answers for Telecommunica...

vegetto1126

If you are a telecommunications company, how would you market yourselves to universities students?

vegetto1126University students are a good target group for cell phones. I would market it with cheaper phone calls between a student and a preferred group of other students.
camdog143

Describe your experiences with telecommunications network components. What do you use every day at home, work?

camdog143I have extensive experience with telecom network components. I used to work in the telecom industry. Daily? I use standard telephonic stuff, nothing fancy and no special electronics.
camdog143

what's your experiences with telecommunications network components. What do you use every day at home, work?

camdog143WOW, well I used to run a router and 3 computers I also am in amateur radio and I use a computer to talk to other computers around the world it's a digtial way, besides voice and theres many forms of ...
J C

How can I obtain a Connecticut Telecommunications Certificate?

J C
lamar211us

What are some interesting topics in telecommunications?

lamar211usBoth of the topics that you have listed sound interesting, are you able to find enough information to do a term paper? Here is a list from wikipedia, you can go there and see if you find anything tha...

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