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Mobile phone

A mobile phone (also known as a cellular phone, cell phone and a hand phone) is a device that can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station.

1973 introductions Mobile phones New media Telephony Mobile telecommunications Videotelephony Embedded systems Mobile telecommunication services

The telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice"), colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other.

Italian inventions Canadian inventions 1876 introductions Telephony Scottish inventions Discovery and invention controversies Telecommunications equipment American inventions Office equipment
Voice over IP

Voice over IP (VoIP, or voice over Internet Protocol) commonly refers to the communication protocols, technologies, methodologies, and transmission techniques involved in the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone.

Voice over IP Telecommunications terms Broadband Videotelephony Audio network protocols
Bell Labs

Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) is the research and development subsidiary of the French-owned Alcatel-Lucent and previously of the American Telephone & Telegraph Company (AT&T), half-owned through its Western Electric manufacturing subsidiary. Bell Laboratories operates its headquarters at Murray Hill, New Jersey, United States, and has research and development facilities throughout the world.

Computer science research organizations Communications in New Jersey AT&T Computer science institutes in the United States Bell System National Medal of Technology recipients Bell Labs Alcatel-Lucent Research and development organizations
BT Group

BT Group plc is a British multinational telecommunications services company headquartered in London, United Kingdom. It is one of the largest telecommunications services companies in the world and has operations in over 170 countries. Through its BT Global Services division it is a major supplier of telecoms services to corporate and government customers worldwide.

British Royal Warrant holders Companies listed on the London Stock Exchange Telecommunications companies of the United Kingdom Internet service providers of the United Kingdom BT Group 1981 establishments in the United Kingdom Organisations based in the City of London Companies established in 1981

A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from light emitting diodes to radio.

1958 introductions Modems Bulletin board systems Logical link control Physical layer protocols

The TARDIS (is a time machine and spacecraft in the British science fiction television programme Doctor Who and its associated spin-offs. A TARDIS is a product of the advanced technology of the Time Lords, an extraterrestrial civilization to which the programme's central character, the Doctor belongs. A properly maintained and piloted TARDIS can transport its occupants to any point in time and any place in the universe.

Acronyms Bioships Doctor Who devices Time travel devices
Telephone exchange

In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central office (CO) is the physical building used to house inside plant equipment including telephone switches, which make telephone calls "work" in the sense of making connections and relaying the speech information.

Telephone exchanges Hungarian inventions
Sprint Nextel

Sprint Nextel Corporation provides wireless and wireline voice and data telecommunications services to customers in the United States, Puerto Rico and the U.S. Virgin Islands. Sprint Nextel offers retail services under the Sprint, Nextel, Boost Mobile, Virgin Mobile, and Assurance Wireless brands and provides wholesale wireless access to a number of Mobile Virtual Network Operators in the United States.

Mobile phone companies of the United States Companies based in Overland Park, Kansas Sprint Nextel Companies based in the Kansas City metropolitan area Tier 1 networks Telecommunications companies of the United States Companies established in 2005 Companies listed on the New York Stock Exchange Companies established in 1938

Brantford, is a city located on the Grand River in Southern Ontario, Canada. While geographically surrounded by the County of Brant, the city is politically independent. However Brantford and the County of Brant are grouped in the same census division. Brantford is connected to Woodstock in the west and Hamilton in the east by Highway 403 and to Cambridge to the north and Simcoe to the south by Highway 24.

Populated places established in 1877 Brantford
Signals intelligence

Signals intelligence (often contracted to SIGINT) is intelligence-gathering by interception of signals, whether between people ("communications intelligence"—COMINT), whether involving electronic signals not directly used in communication ("electronic intelligence"—ELINT), or combinations of the two. As sensitive information is often encrypted, signals intelligence often involves the use of cryptanalysis.

Intelligence gathering disciplines Cyberwarfare Signals intelligence Military acronyms Intelligence (information gathering) Cryptography Military intelligence
Universal Mobile Telecommunications System

Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular technology for networks based on the GSM standard. Developed by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology.

Universal Mobile Telecommunications System Videotelephony 2002 introductions 3rd Generation Partnership Project standards

Ericsson (Telefonaktiebolaget L. M. Ericsson), one of Sweden's largest companies, is a provider of telecommunications equipment and data communication systems, and related services, covering a range of technologies, including especially mobile networks. Ericsson is currently the world's largest mobile telecommunications equipment vendor with a market share of 35%. Directly and through subsidiaries, Ericsson also has a major role in mobile devices and cable TV and IPTV systems.

Networking hardware companies Mobile phone manufacturers Companies related to the Wallenberg family Companies formerly listed on the London Stock Exchange Swedish brands Telecommunications equipment vendors Electronics companies Companies of Sweden Ericsson Companies established in 1876
Public switched telephone network

The public switched telephone network (PSTN) is the network of the world's public circuit-switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by switching centers, thus allowing any telephone in the world to communicate with any other.

Telephony Telecommunications systems

The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU); it coordinates standards for telecommunications. The standardization work of ITU dates back to 1865, with the birth of the International Telegraph Union.

International Telecommunication Union Standards organizations
Bell Canada

Bell Canada (commonly referred to as Bell) is a Canadian telecommunications and media company headquartered in Montreal, Quebec. Including its subsidiaries such as Bell Aliant, Northwestel, Télébec, and NorthernTel, it is the incumbent local exchange carrier for telephone and DSL Internet services in most of Canada east of Manitoba and in the northern territories, and a major competitive local exchange carrier for enterprise customers in the western provinces.

Bell Canada Companies based in Montreal Bell System S&P/TSX 60 Index Companies listed on the Toronto Stock Exchange S&P/TSX Composite Index Companies established in 1880 Telecommunications companies of Canada 1880 in Canada

9-1-1 is the emergency telephone number for the North American Numbering Plan (NANP), one of eight N11 codes. The use of this number is for emergency circumstances only, and to use it for any other purpose (including non-emergency situations and prank calls) can be a crime.

Three-digit telephone numbers Article Feedback 5 1968 introductions Emergency telephone numbers
Telephone tapping

Telephone tapping (also wire tapping or wiretapping in American English) is the monitoring of telephone and Internet conversations by a third party, often by covert means. The wire tap received its name because, historically, the monitoring connection was an actual electrical tap on the telephone line. Legal wiretapping by a government agency is also called lawful interception. Passive wiretapping monitors or records the traffic, while active wiretapping alters or otherwise affects it.

Telephone tapping
Radio masts and towers

Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. They are among the tallest man-made structures. Similar structures include electricity pylons and towers for wind turbines. Masts are sometimes named after the broadcasting organisations that use them, or after a nearby city or town.

Radio masts Radio Broadcast transmitters Telecommunications infrastructure Telecommunications equipment Broadcast engineering Antennas (radio) Communication towers

Alcatel-Lucent is a global telecommunications equipment corporation, headquartered in the 7th arrondissement of Paris, France. It provides telecommunications solutions to service providers, enterprises, and governments around the world, enabling these customers to deliver voice, data, and video services. The company focuses on fixed, mobile, and converged networking hardware, IP technologies, software, and services.

Companies established in 2006 Telecommunications equipment vendors Companies formerly listed on the Tokyo Stock Exchange Telecommunications companies of the United States Alcatel-Lucent Telecommunications companies of France 2006 establishments in France
Coaxial cable

Coaxial cable, or coax, has an inner conductor surrounded by a flexible, tubular insulating layer, surrounded by a tubular conducting shield. The term coaxial comes from the inner conductor and the outer shield sharing the same geometric axis. Coaxial cable was invented by English engineer and mathematician Oliver Heaviside, who patented the design in 1880.

Article Feedback 5 Antennas (radio) Signal cables Television terminology
Orange (telecommunications)

Orange, formerly Orange plc, is a telecommunications corporation of British origin that became a subsidiary of Mannesmann in 1999 and subsequently, in 2000, of the France Telecom group. Orange is the flagship brand of the France Telecom group for mobile, landline and Internet businesses, with 226 million customers as of December 2011 and, under the brand Orange Business Services, is one of the world leaders in providing telecommunication services to multinational companies.

Companies formerly listed on the London Stock Exchange Companies established in 1994 Internet service providers of the United Kingdom France Télécom Orange (telecommunications) Internet service providers of France Mobile phone companies of France
Submarine communications cable

1 - Polyethylene 2 - Mylar tape 3 - Stranded steel wires 4 - Aluminium water barrier 5 - Polycarbonate 6 - Copper or aluminium tube 7 - Petroleum jelly 8 - Optical fibers]] A submarine communications cable is a cable laid on the sea bed between land-based stations to carry telecommunication signals across stretches of ocean. The first submarine communications cables carried telegraphy traffic. Subsequent generations of cables carried telephony traffic, then data communications traffic.

Submarine communications cables Telecommunications equipment History of telecommunications Coastal construction
Telecommunications network

A telecommunications network is a collection of terminals, links and nodes which connect to enable telecommunication between users of the terminals. Networks may use circuit switching or message switching. Each terminal in the network must have a unique address so messages or connections can be routed to the correct recipients. The collection of addresses in the network is called the address space.

Telecommunications engineering Network architecture Telecommunications infrastructure

In telecommunications, telephony encompasses the general use of equipment to provide communication over distances, specifically by connecting telephones to each other. The technology is associated with the electronic transmission of voice, fax, or other information between distant parties using systems historically associated with the telephone, a hand-held device containing both a speaker or transmitter and a receiver.

Telephony History of telecommunications

A ringtone or ring tone is the sound made by a telephone to indicate an incoming call or text message. Not literally a tone nor an actual (bell-like) ring anymore, the term is most often used today to refer to customizable sounds used on mobile phones.

Telephony signals Mobile phone culture 1996 introductions

A landline telephone (also known as land line, land-line, main line, and fixed-line) refers to a phone which uses a solid medium telephone line such as a metal wire or fiber optic cable for transmission as distinguished from a mobile cellular line which uses radio waves for transmission. In 2003, the CIA reported approximately 1.263 billion main telephone lines worldwide. China had more than any other country at 350 million and the United States was second with 268 million.

Telephony Local loop
Telephone company

A telephone company, also known as a telco, telephone service provider, or telecommunications operator, is a kind of communications service provider (CSP) (more precisely a telecommunications service provider or TSP) that provides telecommunications services such as telephony and data communications access. Many telephone companies were at one time government agencies or privately owned but state-regulated monopolies.

Telecommunications companies Public utilities
Call centre

A call centre or call center is a centralised office used for the purpose of receiving and transmitting a large volume of requests by telephone. A call centre is operated by a company to administer incoming product support or information inquiries from consumers. Outgoing calls for telemarketing, clientele, product services, and debt collection are also made. In addition to a call centre, collective handling of letters, faxes, live chat, and e-mails at one location is known as a contact centre.

Telephony Computer telephony integration Marketing

Field research

Field research The term "field research", is used by many industries as a generic reference to collecting or creating new information outside of a laboratory or typical workplace. Biologists prefer fieldwork to captive studies because it gives them a chance to let the animals interact with items in their environments.

Research methods Evaluation methods Methods in sociology Marketing
ITT Corporation

ITT Corporation is a global diversified manufacturing company based in the United States. ITT participates in global markets including water and fluids management, defense and security, and motion and flow control. Forbes. com named ITT Corporation to its list of "America's Best Managed Companies" for 2008, and awarded the company the top spot in the conglomerates category.

ITT Corporation Defense companies of the United States Conglomerate companies Companies established in 1920 Defunct telecommunications companies of the United States Companies based in White Plains, New York
Bell System

The Bell System was the American Bell Telephone Company and then, subsequently, AT&T–led system which provided telephone services to much of the United States and Canada from 1877 to 1984, at various times as a monopoly. In 1984, the company was broken up into separate companies, by a U.S. Justice Department mandate.

Monopolies AT&T Companies established in 1921 Defunct companies based in New York City Bell System Alexander Graham Bell Companies disestablished in 1984 Defunct telecommunications companies of the United States

Not to be confused with marathon (television). 50x40px This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. A telethon is a fundraising event broadcast on television that lasts many hours or even days, the purpose of which is to raise money for a charitable, political, or other allegedly worthy causes.

Philanthropy Charity fundraisers Telethons Television terminology
Cellular network

A cellular network or mobile network is a radio network distributed over land areas called cells, each served by at least one fixed-location transceiver, known as a cell site or base station. When joined together these cells provide radio coverage over a wide geographic area.

Radio resource management Mobile telecommunications Telecommunications infrastructure

A transceiver is a device comprising both a transmitter and a receiver which are combined and share common circuitry or a single housing. When no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s. Technically, transceivers must combine a significant amount of the transmitter and receiver handling circuitry. Similar devices include transponders, transverters, and repeaters.

Telecommunications terms Networking hardware Electronics terms Radio terminology Telephony equipment
Plain old telephone service

Plain old telephone service (POTS) is the voice-grade telephone service that remains the basic form of residential and small business service connection to the telephone network in many parts of the world. The name is a retronym, and is a reflection of the telephone service still available after the advent of more advanced forms of telephony such as ISDN, mobile phones and VoIP.

Telephone services

GTE Corporation, formerly General Telephone & Electronics Corporation (1959-1982) was the largest independent telephone company in the United States during the days of the Bell System. Originally founded in 1929 as Associated Telephone Utilities, it went bankrupt in 1933 during the Great Depression, and reorganized as General Telephone in 1934. In 1991 it acquired the third largest independent, Continental Telephone (ConTel).

Companies disestablished in 2000 Verizon Communications Defunct companies based in Texas Companies based in Irving, Texas Companies established in 1918 Companies formerly listed on the Tokyo Stock Exchange
Bharat Sanchar Nigam Limited

Bharat Sanchar Nigam Limited (abbreviated BSNL) is an Indian state-owned telecommunications company headquartered in New Delhi, India. It is the largest provider of fixed telephony and fourth largest mobile telephony provider in India, and is also a provider of broadband services. However, in recent years the company's revenue and market share plunged into heavy losses due to intense competition in Indian telecommunications sector.

Members of the Conexus Mobile Alliance Internet service providers of India Mobile phone companies of India Telecommunications companies of India Companies based in New Delhi Government-owned companies of India
Telephone number

A telephone number or phone number is a sequence of digits used to call from one telephone line to another in a public switched telephone network. When telephone numbers were invented, they were short — as few as one, two or three digits — and were given orally to a switchboard operator. As phone systems have grown and interconnected to encompass the world, telephone numbers have become longer. In addition to telephones, they now access other devices, such as computers and fax machines.

Telephone numbers Identifiers
Toll-free telephone number

A toll-free, Freecall, Freephone, 800, 0800 or 1-800 number is a special telephone number which is free to the calling party, and instead the telephone carrier charges the called party the cost of the call. A toll-free number is assigned from a special dialing prefix range (also known as area code) such as 1-800.

Telephone numbers Area codes in the United States

A repeater is an electronic device that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances.

Electronics terms Radio terminology Physical layer protocols
North American Numbering Plan

The North American Numbering Plan (NANP) is an integrated telephone numbering plan administered by NeuStar which encompasses 24 countries and territories, including the United States and its territories, Canada, Bermuda, and 17 nations of the Caribbean. The term is also used, by metonymy, to refer to the geographic area in which that plan has been implemented.

Telephone numbers North American Numbering Plan
Sahrawi Arab Democratic Republic

The Sahrawi Arab Democratic Republic (SADR), is a partially recognised state that claims sovereignty over the entire territory of Western Sahara, a former Spanish colony. SADR was proclaimed by the Polisario Front on February 27, 1976, in Bir Lehlu, Western Sahara. The SADR government controls about 20-25% of the territory it claims. It calls the territories under its control the Liberated Territories or the Free Zone.

Polisario Front Territorial disputes of Morocco Secession in Morocco Sahrawi Arab Democratic Republic Member states of the African Union Single-party states Governments in exile Former Spanish colonies States and territories established in 1976 Socialist states Arab republics Unrecognized or largely unrecognized states Disputed territories in Africa
Twisted pair

Twisted pair cabling is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of canceling out electromagnetic interference (EMI) from external sources; for instance, electromagnetic radiation from unshielded twisted pair (UTP) cables, and crosstalk between neighboring pairs. It was invented by Alexander Graham Bell.

Video hardware Cables Electromagnetic compatibility Communication circuits

BellSouth Corporation is an American telecommunications holding company based in Atlanta, Georgia. BellSouth was one of the seven original Regional Bell Operating Companies after the U.S. Department of Justice forced the American Telephone & Telegraph Company to divest itself of its regional telephone companies on January 1, 1984. In a merger announced on March 5, 2006 and executed on December 29, 2006, AT&T Inc.

AT&T Companies based in Atlanta, Georgia Bell System Telecommunications companies of the United States Companies established in 1983
Mobile app

A mobile app (short for mobile application), is a software application designed to run on smartphones, tablet computers and other mobile devices. They are available through application distribution platforms, which are typically operated by the owner of the mobile operating system, such as the Apple App Store, Google Play, Windows Phone Marketplace and BlackBerry App World. Some apps are free, and others have a price.

Telephone line

A telephone line or telephone circuit (or just line or circuit within the industry) is a single-user circuit on a telephone communication system. Typically this refers to the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network, and usually also implies a single telephone number for billing purposes reserved for that user.

Local loop
Telephone numbering plan

A telephone numbering plan is a type of numbering scheme used in telecommunications to allocate telephone numbers to subscribers and to route telephone calls in a telephone network. A closed numbering plan, such as found in North America, imposes a fixed total length to numbers. An open numbering plan features variance in the length of telephone numbers. A dial plan establishes the expected number and pattern of digits for a telephone number.

Telephone numbers ITU-T recommendations Identifiers
Utility pole

A utility pole is a pole used to support overhead power lines and various other public utilities, such as cable, fibre optic cable, and related equipment such as transformers and street lights. It can be referred to as a telephone pole, power pole, hydro pole, telegraph pole, or telegraph post, depending on its application. A stobie pole is a multi-purpose pole made of two steel joists held apart by a slab of concrete in the middle, generally found in South Australia.

Pylons Electric power infrastructure Telecommunications infrastructure Street furniture Electric power distribution Telecommunications equipment Telephony equipment

CenturyLink, Inc. is a global broadband and telecommunications company headquartered in Monroe, Louisiana. The company, founded as Central Telephone & Electronics Corporation in 1968, later changed its name to Century Telephone Enterprises, Inc. in 1971, and then was called CenturyTel, Inc. from 1999 to 2010. A member of the S&P 500 index, the company operates as a local exchange carrier and Internet service provider in U.S.

Pay telephone operators of the United States Companies listed on NASDAQ Internet service providers of the United States CenturyLink Companies established in 1968 Telecommunications companies of the United States Companies based in Louisiana

A pager (often called a beeper) is a simple personal telecommunications device for short messages. A one-way numeric pager can only receive a message consisting of a few digits, typically a phone number that the user is then requested to call. Alphanumeric pagers are available, as well as two-way pagers that have the ability to send and receive email, numeric pages, and SMS messages. The first practical pager was introduced in 1950 by physicians in the New York City area.

Consumer electronics Pagers Telecommunications equipment Radio paging Mobile technology
Prank call

A prank call (also known as a crank call) is a form of practical joke done over the telephone. Prank phone calls began to gain an America-wide following over a period of many years, as they gradually became a staple of the obscure and amusing cassette tapes traded amongst musicians, sound engineers, and media traders beginning in the late 1970s. Among the most famous and earliest recorded prank calls are the Tube Bar prank calls tapes, which centered around Louis "Red" Deutsch.

Telephone crimes Podcasting Practical jokes Comedy Prank calling
Call center


An invoice or bill is a commercial document issued by a seller to the buyer, indicating the products, quantities, and agreed prices for products or services the seller has provided the buyer. An invoice indicates the buyer must pay the seller, according to the payment terms. The buyer has a maximum amount of days to pay for these goods and is sometimes offered a discount if paid before the due date.

Accounting source documents Business terms
NSA warrantless surveillance controversy

The NSA warrantless surveillance controversy (AKA "Warrantless Wiretapping") concerns surveillance of persons within the United States during the collection of foreign intelligence by the U.S. National Security Agency (NSA) as part of the war on terror.

Counter-terrorism policy of the United States Espionage George W. Bush administration controversies Privacy of telecommunications National Security Agency Mass surveillance United States national security policy Surveillance scandals Emergency laws
Nippon Telegraph and Telephone

, commonly known as NTT, is a Japanese telecommunications company headquartered in Tokyo, Japan. Ranked the 31st in Fortune Global 500, NTT is the largest telecommunications company in Asia, and the second-largest in the world in terms of revenue. The company is incorporated pursuant to the NTT Law (Law Concerning Nippon Telegraph and Telephone Corporation, Etc.).

Companies established in 1985 Nippon Telegraph and Telephone Telecommunications companies of Japan Companies listed on the Osaka Securities Exchange Companies based in Tokyo Telecommunications companies
Telephone directory

A telephone directory (also called a telephone book, phone book and white/yellow pages) is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by name and address to be found.

Telephone numbers Directories History of the telephone
Reliance Communications

Reliance Communications Ltd. (commonly called RCOM) is an Indian broadband and telecommunications company headquartered in Navi Mumbai, India. RCOM is the world's 16th largest mobile phone operator with over 150 million subscribers. Established on 2004, a subsidiary of the Reliance Group.

Companies based in Mumbai S&P CNX Nifty Private equity portfolio companies Internet service providers of India Companies established in 2004 Mobile phone companies of India Telecommunications companies of India

Alltel Wireless is a wireless service provider, primarily based in the United States. Before an acquisition by Verizon Wireless, it served 34 states. After the merger, Alltel continues to serve six states, mostly in rural areas. Following the merger, Alltel is the ninth largest wireless telecommunications company in the United States, with approximately 800,000 customers.

Texas Pacific Group companies Companies based in Little Rock, Arkansas Verizon Communications Defunct mobile phone companies of the United States Companies based in Arkansas Companies established in 1943 Alltel
Telephone booth

A telephone booth, telephone kiosk, telephone call box or telephone box is a small structure furnished with a payphone and designed for a telephone user's convenience. In the USA and Canada, "telephone booth" is used, while in the United Kingdom, Australia and the rest of the Commonwealth of Nations it is a "telephone box" or "phone box". Such a booth usually has a door to provide privacy and a window to let others know if the booth is in use.

Public phones Street furniture

Televoting, telephone voting or phone voting is a method of decision making and opinion polling conducted by telephone. Televoting can also extend to voting by SMS text message via a mobile cell phone.

Eurovision Song Contest Deliberative methods Types of polling

A payphone is a public telephone, often located in a phone booth or a privacy hood, with pre-payment by inserting money, a credit or debit card, or a telephone card. Payphones are often found in public places, transportation hubs such as airports or train stations, convenience stores, malls, casinos, and on street corners. By agreement with the landlord, either the phone company pays rent for the location and keeps the revenue, or the landlord pays rent for the phone and shares the revenue.

American inventions Public phones Vending Street furniture
Telephone call

"Phone Call" redirects here. For the OmPuff album, see Phone Call (album). A telephone call is a connection over a telephone network between the calling party and the called party.

Oral communication Teletraffic
Long-distance calling

In telecommunications, a long-distance call is a telephone call made outside a certain area, usually characterized by an area code outside of a local call area (known in the United States as a Local Access and Transport Area or LATA). Long-distance calls usually carry long-distance charges that, within certain nations, vary between phone companies and are the subject of much competition. International calls are calls made between different countries, and usually carry much higher charges.

Telephone services
TRS connector

A TRS connector (tip, ring, sleeve) is a common family of connector typically used for analog signals including audio. It is cylindrical in shape, typically with three contacts, although sometimes with two (a TS connector) or four (a TRRS connector). It is also termed an audio jack, phone jack, phone plug, and jack plug. Specific models are termed stereo plug, mini-jack, mini-stereo, headphone jack, tiny telephone connector and bantam plug.

Audiovisual connectors Computer connectors DC power connectors Audio engineering Telephone connectors

Telemarketing (sometimes known as inside sales, or telesales in the UK and Ireland) is a method of direct marketing in which a salesperson solicits prospective customers to buy products or services, either over the phone or through a subsequent face to face or Web conferencing appointment scheduled during the call. Telemarketing can also include recorded sales pitches programmed to be played over the phone via automatic dialing.

Direct marketing Promotion and marketing communications Telemarketing Marketing

A shower (or shower-bath, walk-in shower, steam shower) is an area in which one bathes underneath a spray of water.

Bathrooms Bathing Plumbing Hygiene
Interactive voice response

Interactive voice response (IVR) is a technology that allows a computer to interact with humans through the use of voice and DTMF tones input via keypad. In telecommunications, IVR allows customers to interact with a company’s host system via a telephone keypad or by speech recognition, after which they can service their own inquiries by following the IVR dialogue. IVR systems can respond with prerecorded or dynamically generated audio to further direct users on how to proceed.

Telephone services User interface techniques
Satellite phone

A satellite telephone, satellite phone, or satphone is a type of mobile phone that connects to orbiting satellites instead of terrestrial cell sites. They provide similar functionality to terrestrial mobile telephones; voice, short messaging service and low-bandwidth internet access are supported through most systems. Depending on the architecture of a particular system, coverage may include the entire Earth, or only specific regions.

Mobile telecommunications Satellite telephony Mobile phones Emergency communication
Utility cooperative

A utility cooperative is a type of cooperative that is tasked with the delivery of a public utility such as electricity, water or telecommunications to its members. Profits are either reinvested for infrastructure or distributed to members in the form of "patronage" or "capital credits", which are essentially dividends paid on a member's investment into the cooperative.

Telecommunications companies Utility cooperatives Public utilities
Emergency telephone number

In many countries the public telephone network has a single emergency telephone number (sometimes known as the universal emergency telephone number or occasionally the emergency services number) that allows a caller to contact local emergency services for assistance. The emergency number differs from country to country; it is typically a three-digit number so that it can be easily remembered and dialed quickly.

Emergency telephone numbers
Queueing theory

Queueing theory is the mathematical study of waiting lines, or queues. The theory enables mathematical analysis of several related processes, including arriving at the (back of the) queue, waiting in the queue (essentially a storage process), and being served at the front of the queue.

Markov processes Rationing and licensing Formal sciences Services management and marketing Operations research Production and manufacturing Stochastic processes Markov models Queueing theory Network performance
Mobile telephony

Mobile telephony is the provision of telephone services to phones which may move around freely rather than stay fixed in one location. Mobile phones connect to a terrestrial cellular network of base stations, whereas satellite phones connect to orbiting satellites. Both networks are interconnected to the public switched telephone network to allow any phone in the world to be dialed. In 2010 there were estimated to be five billion mobile cellular subscriptions in the world.

Mobile telecommunications
Philippine Long Distance Telephone Company

The Philippine Long Distance Telephone Company commonly known as PLDT, is the largest telecommunications company in the Philippines. PLDT is also the largest company in the Philippines, ranked 1138th in the April 2009 update, and 1080th in the April 2010 update, of Forbes' Global 2000 list. As of 2011 it is ranked the 1297th company in the world.

Companies listed on the Philippine Stock Exchange Telecommunications companies of the Philippines Companies established in 1928 Companies listed on the New York Stock Exchange
List of country calling codes

This is a list of country calling codes defined by ITU-T recommendations E.123 and E.164, also called IDD or ISD codes. The telephone numbering plan for a telephone system includes an international dialing prefix, such as "00" or "011", which is added before the country calling code and is specific to the country from which the caller is dialling. Generally, as in the list below, the need for this prefix is specified with a "+".

Communication-related lists Telephone numbers Telecommunications lists Country codes
Answering machine

The answering machine, answerphone or message machine, also known as the telephone answering machine (or TAM) in the UK and some Commonwealth countries), ansaphone, ansafone, or telephone answering device (TAD) is a device for answering telephones and recording callers' messages.

Telephony 1898 introductions
Prepaid mobile phone

A prepaid mobile phone (also commonly referred to as pay-as-you-go, pay-as-you-talk, "pay and go", or prepaid wireless) is a mobile phone for which credit is purchased in advance of service use. The purchased credit is used to pay for mobile phone services at the point the service is accessed or consumed. If there is no available credit then access to the requested service is denied by the mobile phone network.

Telecommunications economics Mobile telecommunication services Mobile phones
Bell Telephone Company

The Bell Telephone Company, a common law joint stock company, was organized in Boston, Massachusetts on July 9, 1877 by Alexander Graham Bell's father-in-law Gardiner Greene Hubbard, who also helped organize a sister company — the New England Telephone and Telegraph Company. The Bell Telephone Company was started on the basis of holding "potentially valuable patents", principally Bell's master telephone patent #174465.

Monopolies AT&T Bell System Companies established in 1877 Alexander Graham Bell Defunct telecommunications companies of the United States
Local loop

In telephony, the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network. At the edge of the carrier access network in a traditional PSTN scenario, the local loop terminates in a circuit switch housed in an incumbent local exchange carrier telephone exchange.

Local loop Telecommunications infrastructure
Vertical service code

A vertical service code or VSC is a special code dialed prior to (or instead of) a telephone number that engages some type of special telephone service. Typically preceded with an asterisk, or * (star), key on the touch tone keypad and colloquially referred to as star codes, most are two digits in length although, as more services are developed, those that use 2 or 3 as the first digit are sometimes three digits in length.

Telephone numbers in the United States Telephone numbers Calling features Telephone numbers in Canada North American Numbering Plan
Conference call

A conference call is a telephone call in which the calling party wishes to have more than one called party listen in to the audio portion of the call. The conference calls may be designed to allow the called party to participate during the call, or the call may be set up so that the called party merely listens into the call and cannot speak. It is often referred to as an ATC (Audio Tele-Conference).

Telephone service enhanced features Calling features

"Picturephone" and "Visiophone" redirect here. For the Beyoncé Knowles song, see Video Phone (song). A videophone is a telephone with a video display, capable of simultaneous video and audio for communication between people in real-time. Videophone service provided the first form of videotelephony, later to be followed by videoconferencing, webcams, and finally high-definition telepresence.

Video Telecommunication services Health informatics Smartphones Assistive technology Technology in society Videotelephony Teleconferencing Film and video technology
Telephone operator

A telephone operator is either a person who provides assistance to a telephone caller, usually in the placing of operator assisted telephone calls such as calls from a pay phone, collect calls (called reversed-charge calls in the UK), calls which are billed to a credit card, station-to-station and person-to-person calls, and certain international calls which cannot be dialed directly.

Telephony Business and financial operations occupations
Cell site

A cell site is a term used to describe a site where antennas and electronic communications equipment are placed, usually on a radio mast, tower or other high place, to create a cell (or adjacent cells) in a cellular network. The elevated structure typically supports antennas, and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing, primary and backup electrical power sources, and sheltering.

Telecommunications infrastructure
Business telephone system

A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private branch. A business telephone system differs from simply using a telephone with multiple lines in that the lines used are accessible from multiple telephones, or "stations" in the system, and that such a system often provides additional features related to call handling.

Telephone exchange equipment Telephony equipment Computer telephony integration
Ipsos MORI

Ipsos MORI is the second largest market research organisation in the United Kingdom, formed by a merger of Ipsos UK and MORI, two of Britain's leading survey companies in October 2005 . Ipsos MORI conduct surveys for a wide range of major organisations as well as other market research agencies. Ipsos MORI's Social Research Institute works extensively for the Government of the United Kingdom, looking at public attitudes to key public services, and so informing social policy.

Public opinion research companies Companies based in London Opinion polling in the United Kingdom Marketing research companies of the United Kingdom
Telephone (song)

"Telephone" is a song written and performed by Lady Gaga. It was released from her third extended play (EP) and second major release The Fame Monster (2009). The song, featuring American R&B singer Beyoncé Knowles, was written by Gaga and Rodney Jerkins.

Songs produced by Rodney Jerkins 2010 singles Songs written by Beyoncé Knowles Singles certified gold by the Belgian Entertainment Association UK Singles Chart number-one singles Dance-pop songs Billboard Hot Dance Club Songs number-one singles Singles certified platinum by the Recording Industry Association of New Zealand Songs written by Rodney Jerkins Number-one singles in Norway Interscope Records singles Songs written by Lady Gaga Singles certified gold by the International Federation of the Phonographic Industry of Switzerland Singles certified gold by the Productores de Música de España European Hot 100 Singles number-one singles Songs about telephones Lady Gaga songs Music videos directed by Jonas Åkerlund Singles certified gold by the Bundesverband Musikindustrie Ultratop 50 Singles number-one singles Singles certified triple platinum by the Canadian Recording Industry Association Singles certified platinum by the Federation of the Italian Music Industry Number-one singles in Denmark Irish Singles Chart number-one singles Singles certified gold by the Recording Industry Association of Japan Singles certified gold by the International Federation of the Phonographic Industry of Denmark Beyoncé Knowles songs Ultratop 40 Singles number-one singles Singles certified triple platinum by the Australian Recording Industry Association Singles certified gold by the Syndicat National de l'Édition Phonographique

In telecommunications, the terms multi-band, dual-band, tri-band, quad-band and penta-band refer to a device (especially a mobile phone) supporting multiple radio frequency bands. All devices which have more than one channel use multiple frequencies; a band however is a group of frequencies containing many channels. Multiple bands in mobile devices support roaming between different regions where different standards are used for mobile telephone services.

GSM standard Mobile technology
Crossbar switch

In electronics, a crossbar switch (also known as cross-point switch, crosspoint switch, or matrix switch) is a switch connecting multiple inputs to multiple outputs in a matrix manner. Originally the term was used literally, for a matrix switch controlled by a grid of crossing metal bars, and later was broadened to matrix switches in general. It is one of the principal switch architectures, together with a rotating switch, memory switch and a crossover switch.

Switches Electronic circuits Telephone exchange equipment
Premium-rate telephone number

Premium-rate telephone numbers are telephone numbers for telephone calls during which certain services are provided, and for which prices higher than normal are charged. Unlike a normal call, part of the call charge is paid to the service provider, thus enabling businesses to be funded via the calls. While the billing is different, calls are usually routed the same way they are for a toll-free telephone number, being anywhere despite the area code used.

Telephone numbers Telecommunications economics
Frontier Communications

Frontier Communications Corporation is a telephone company in the United States, mainly serving rural areas and smaller communities. It was known as Citizens Utilities Company until May 2000 and Citizens Communications Company until July 31, 2008. Frontier is the sixth largest local exchange carrier in the United States.

Companies listed on NASDAQ Internet service providers of the United States Companies established in 1935 Frontier Communications Telecommunications companies of the United States Companies based in Stamford, Connecticut

Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks. As telephone networks have become computerized, phreaking has become closely linked with computer hacking. This is sometimes called the H/P culture (with H standing for hacking and P standing for phreaking).

Phreaking Telephone crimes
Phone sex

Phone sex is a type of virtual sex that refers to sexually explicit conversation between or other persons via telephone, especially when at least one of the participants masturbates or engages in sexual fantasy. Phone sex conversation may take many forms, including (but not limited to): guided, sexual sounds, narrated, and enacted suggestions; sexual anecdotes and confessions; candid expression of sexual feelings or love and or discussion of very personal and sensitive sexual topics.

Pornography Masturbation Information by telephone Sexual acts
Red telephone box

The red telephone box, a telephone kiosk for a public telephone designed by Sir Giles Gilbert Scott, is a familiar sight on the streets of the United Kingdom, Malta, Bermuda and Gibraltar, and despite a reduction in their numbers in recent years, red boxes can still be seen in many places and in current or former British colonies around the world. The colour red was chosen to make them easy to spot.

Public phones Street furniture
Incumbent local exchange carrier

An incumbent local exchange carrier (ILEC), is a local telephone company in the United States that was in existence at the time of the breakup of AT&T into the Regional Bell Operating Companies (RBOCs), also known as the "Baby Bells. " The ILEC is the former Bell System or Independent Telephone Company responsible for providing local telephone exchange services in a specified geographic area.

Telephony United States communications regulation
999 (emergency telephone number)

999 is an official emergency telephone number in a number of countries which allows the caller to contact emergency services for urgent assistance. States using 999 include the United Kingdom, Kingdom of Swaziland, Ireland, Poland, Saudi Arabia, the United Arab Emirates, Macao, Bahrain, Qatar, Bangladesh, Botswana, Ghana, Kenya, Hong Kong, Malaysia, Mauritius, Singapore, Zimbabwe, and Trinidad and Tobago.

Three-digit telephone numbers Emergency telephone numbers
Cordless telephone

A cordless telephone or portable telephone replaces the handset cord with a radio link. The handset communicates with a base station connected to a fixed telephone line. The range is limited usually to the same building or some short distance from the base station. The base station attaches to the telephone network the same way a corded telephone does. The base station on subscriber premises is what differentiates a cordless telephone from a mobile telephone.

American inventions Telephony equipment Consumer electronics

A teleconference or teleseminar is the live exchange and mass articulation of information among several persons and machines remote from one another but linked by a telecommunications system. Terms such as audio conferencing, telephone conferencing and phone conferencing are also sometimes used to refer to teleconferencing.

Bell System divestiture

The Bell System divestiture, or the breakup of AT&T, was initiated by the filing in 1974 by the U.S. Department of Justice of an antitrust lawsuit against AT&T. The case, United States v. AT&T, led to a settlement finalized on January 8, 1982, under which "Bell System" agreed to divest its local exchange service operating companies, in return for a chance to go into the computer business, AT&T Computer Systems.

AT&T Bell System History of telecommunications in the United States 1974 in the United States
Telephone switchboard

A switchboard (also called a manual exchange) was a device used to connect a group of telephones manually to one another or to an outside connection, within and between telephone exchanges or private branch exchanges (PBXs). The user was typically known as an operator. Public manual exchanges disappeared during the last half of the 20th century, leaving a few PBXs working in offices and hotels as manual branch exchanges.

History of telecommunications Telephone exchanges
Pacific Bell

Pacific Bell is an informal name of Pacific Bell Telephone Company, which is a provider of telephone service in California. The company is owned by AT&T through AT&T Teleholdings. Historically, the company has had many names and service areas. The name "Pacific Bell" is no longer commonly used.

AT&T Bell System Companies established in 1906 Communications in California Companies based in El Sobrante, California
Manitoba Telecom Services

Manitoba Telecom Services Inc. , or MTS, formerly Manitoba Telephone System, is the primary telecommunications carrier in the Canadian province of Manitoba and the fourth largest telecommunications provider in Canada with 7000 employees. It provides local and long-distance phone services, television service, Internet service and wireless services including digital PCS, cellular, and paging.

Communications in Manitoba Public utilities Companies listed on the Toronto Stock Exchange Former Crown corporations of Canada S&P/TSX Composite Index Telecommunications companies of Canada Companies based in Winnipeg
Leased line

A leased line is a service contract between a provider and a customer, whereby the provider agrees to deliver a symmetric telecommunications line connecting two or more locations in exchange for a monthly rent (hence the term lease). It is sometimes known as a "Private Circuit" or "Data Line" in the UK. Unlike traditional PSTN lines it does not have a telephone number, each side of the line being permanently connected to the other.

Local loop Communication circuits
Rotary dial

The rotary dial is a device mounted on or in a telephone or switchboard that is designed to send electrical pulses, known as pulse dialing, corresponding to the number dialed. The early form of the rotary dial used lugs on a finger plate instead of holes. Almon Brown Strowger filed the first patent for a rotary dial, U.S. patent #486,909, on December 21, 1891, that was later issued to him on November 29, 1892.

Telephony signals Telephony equipment Obsolete technologies
Telephone numbers in the United Kingdom

The UK telephone numbering plan, also known as the National Telephone Numbering Plan, is the system used for assigning telephone numbers in the United Kingdom and the Crown Dependencies. It is regulated by the UK government's Office of Communications, which holds responsibility for telecommunications.

Telephone numbers by country United Kingdom-related lists Telephone numbers in the United Kingdom
Digital Enhanced Cordless Telecommunications

Digital Enhanced Cordless Telecommunications (Digital European Cordless Telecommunications), usually known by the acronym DECT, is a digital communication standard, which is primarily used for creating cordless phone systems. It originated in Europe, where it is the universal standard, replacing earlier cordless phone standards, such as 900 MHz CT1 and CT2. Beyond Europe, it has been adopted by Australia, and most countries in Asia and South America.

Local loop Mobile telecommunications standards Software-defined radio Broadband
Southwestern Bell

For information on the holding company Southwestern Bell Corporation, later SBC Communications, Inc. , see AT&T.

Companies established in 1882 AT&T Bell System Communications in Missouri Communications in Oklahoma Communications in Arkansas Companies based in Dallas, Texas Communications in Texas Telecommunications companies of the United States Communications in Kansas
Telecommunication circuit

A telecommunication circuit is any line, conductor, or other conduit by which information is transmitted. A dedicated circuit, private circuit, or leased line is a line that is dedicated to only one use. Originally, this was analog, and was often used by radio stations as a studio/transmitter link (STL) or remote pickup unit (RPU) for their audio, sometimes as a backup to other means. Later lines were digital, and used for private corporate data networks.

The Russell Brand Show prank telephone calls row

The Russell Brand Show prank telephone calls row, sometimes colloquially referred to as "Sachsgate", concerned a series of voice messages that comedian Russell Brand and TV presenter Jonathan Ross left on the answering machine of actor Andrew Sachs, which were labelled obscene by many media commentators and politicians. It followed a BBC Radio 2 broadcast of an advance-recorded episode of The Russell Brand Show on Saturday 18 October 2008.

2008 in the United Kingdom BBC Radio 2 BBC controversies 2008 in radio Entertainment scandals
Customer-premises equipment

Customer-premises equipment or customer-provided equipment (CPE) is any terminal and associated equipment located at a subscriber's premises and connected with a carrier's telecommunication channel(s) at the demarcation point ("demarc"). The demarc is a point established in a building or complex to separate customer equipment from the equipment located in either the distribution infrastructure or central office of the Communications Service Provider.

Telephony equipment
Police box

A police box is a British telephone kiosk or callbox located in a public place for the use of members of the police, or for members of the public to contact the police. Unlike an ordinary callbox, its telephone is located behind a hinged door so it can be used from the outside, and the interior of the box is, in effect, a miniature police station for use by police officers.

Doctor Who devices Public phones Law enforcement equipment Street furniture Law enforcement in the United Kingdom
Attorney–client privilege

Access network

An access network is that part of a telecommunications network which connects subscribers to their immediate service provider. It is contrasted with the core network, which connects local providers to each other. The access network may be further divided between feeder plant or distribution network, and drop plant or edge network.

Network access

A radiotelephone is a communications system for transmission of speech over radio. Radiotelephone systems are not necessarily interconnected with the public "land line" telephone network. "Radiotelephone" is often used to describe the usage of radio spectrum where it is important to distinguish the type of emission from, for example, radiotelegraph or video signals.

Mobile telecommunications Telephony equipment Maritime communication

Saskatchewan Telecommunications Holding Corporation (SaskTel) is the leading full service communications provider in Saskatchewan, with $1.1 billion in annual revenue and over 1.4 million customer connections including over 568,000 wireless accesses, 528,000 wireline network accesses, 230,000 internet accesses and 85,000 Max™ (IPTV) subscribers.

Crown corporations of Saskatchewan Companies based in Regina, Saskatchewan Communications in Saskatchewan Internet service providers of Canada Telecommunications companies of Canada
Penguin Cafe Orchestra

The Penguin Cafe Orchestra (PCO) was a collective of performing musicians created by classically trained British guitarist, composer and arranger Simon Jeffes. Jeffes and cellist co-founder Helen Liebmann were core members throughout its life and a number of other musicians joined as the band grew and developed, many of whom appear on the PCO's six studio albums.

Chamber jazz ensembles E.G. Records artists English folk musical groups Virgin Records artists
Feist v. Rural

Feist Publications, Inc. , v. Rural Telephone Service Co. , 499 U.S. 340 (1991), commonly called Feist v. Rural, is an important United States Supreme Court case establishing that information alone without a minimum of original creativity cannot be protected by copyright. In the case appealed, Feist had copied information from Rural's telephone listings to include in its own, after Rural had refused to license the information. Rural sued for copyright infringement.

United States copyright case law 1991 in United States case law Yellow Pages United States Supreme Court cases
112 (emergency telephone number)

112 is the common emergency telephone number that can be dialed free of charge from any telephone or any mobile phone in order to reach emergency services (Ambulances, Fire & Rescue Service and the Police) in the European Union (EU), its candidates for accession, members of the EEA agreement, as well as several other countries in the world.

Three-digit telephone numbers Emergency telephone numbers

This is about the network-design strategies; for riding in auto cargo space, see Trunking (auto), and for the UK term for electrical wireways, see Electrical conduit#Trunking. In modern communications, trunking is a concept by which a communications system can provide network access to many clients by sharing a set of lines or frequencies instead of providing them individually. This is analogous to the structure of a tree with one trunk and many branches.

Networks Communication circuits

The Belgacom Group is the largest telecommunications company in Belgium, headquartered in Brussels. Belgacom Group is primarily state owned, with the Belgian state holding 53.3% + 1 share. Belgacom Group offerings include fixed line communication through the Belgacom brand, mobile communications through the Proximus brand and ICT services to the professional market under the Telindus brand.

Belgian Royal Warrant holders Telecommunications companies of Belgium Dutch-language television networks Belgian brands
New York Telephone

The New York Telephone Company (NYTel) was organized in 1896, taking over the New York City operations of the American Bell Telephone Company.

Bell System Verizon Communications Companies established in 1896 Communications in New York Telecommunications companies of the United States
Cincinnati Bell

Cincinnati Bell is the dominant telephone company for Cincinnati, Ohio, and its nearby suburbs in the U.S. states of Ohio, Indiana and Kentucky. The parent company is named Cincinnati Bell Inc. Its incumbent local exchange carrier subsidiary uses the name Cincinnati Bell Telephone Company LLC, and Cincinnati Bell Wireless provides mobile phone services. Other subsidiaries handle services such as payphones and long distance calling.

Internet service providers of the United States Broadband Companies established in 1873 Bell System Communications in Kentucky Communications in Indiana Telecommunications companies of the United States Cincinnati Bell Companies listed on the New York Stock Exchange Companies based in Cincinnati, Ohio Communications in Ohio

In telecommunications, a scrambler is a device that transposes or inverts signals or otherwise encodes a message at the transmitter to make the message unintelligible at a receiver not equipped with an appropriately set descrambling device. Whereas encryption usually refers to operations carried out in the digital domain, scrambling usually refers to operations carried out in the analog domain.

Television terminology Cryptography Telecommunications equipment Satellite broadcasting Line codes
Windstream Communications

Windstream Corporation is a provider of voice and data network communications, and managed services (virtual servers, managed firewall, data storage, cloud-based voice, etc. ), to businesses in the United States. The company also offers residential broadband, phone and digital TV services to consumers within its coverage area. It is the ninth largest residential telephone provider in the country.

Companies established in 2000 Companies based in Little Rock, Arkansas Companies based in Arkansas Windstream
The Bell Telephone Hour

The Bell Telephone Hour (also known as The Telephone Hour) is a long-run concert series which began April 29, 1940 on NBC Radio and was heard on NBC until June 30, 1958. Sponsored by Bell Telephone as the name assumes, it showcased the best in classical and Broadway music, reaching eight to nine million listeners each week. It continued on television from 1959 to 1968. Throughout the program's run on both radio and television, the studio orchestra on the program was conducted by Donald Voorhees.

1950s American television series NBC network shows American music television series Black-and-white television programs 1968 television series endings Bell System 1940s American radio programs 1959 television series debuts Peabody Award winning radio programs American classical music radio programs 1960s American television series 1930s American radio programs English-language television series
Nordic Mobile Telephone

NMT (Nordisk MobilTelefoni or Nordiska MobilTelefoni-gruppen, Nordic Mobile Telephony in English) is the first fully automatic cellular phone system. It was specified by Nordic telecommunications administrations and opened for service in 1 October 1981 as a response to the increasing congestion and heavy requirements of the manual mobile phone networks: ARP in Finland and MTD (450 MHz) in Sweden and Denmark and OLT in Norway.

Mobile radio telephone systems 1981 introductions
Lineman (occupation)

A lineman (American English) or linesman (English), also occasionally called a lineworker or a powerline technician (PLT), is a tradesman who constructs and maintains electric power transmission and distribution facilities. The term is also used for those who install and maintain telephone, telegraph, cable TV and more recent fibre optic lines. The term refers to those who work in generally outdoor installation and maintenance jobs.

Technicians Electric power Construction trades workers
Ten-digit dialing

In the United States and Canada, 10-digit dialing is a popular term used to refer to the practice of including the area code of a phone number when dialing. Sometimes (see below), an initial "1" is used; such dialing is known as 11-digit dialing or national format.

North American Numbering Plan
Mahanagar Telephone Nigam Limited

Mahanagar Telephone Nigam Limited (MTNL) is a state-owned telecommunications service provider in the metro cities of Mumbai and New Delhi in India. The company was a monopoly until 1992, when the telecom sector was opened to other service providers. "Transparency makes us different" is the motto of the company. In recent years, MTNL has been losing revenue and market share heavily due immense competition in the Indian telecom sector.

S&P CNX Nifty Members of the Conexus Mobile Alliance Internet service providers of India 1986 establishments in India Mobile phone companies of India Telecommunications companies of India Companies established in 1986 Companies listed on the New York Stock Exchange Companies listed on the Bombay Stock Exchange Companies based in New Delhi Government-owned companies of India

On a telephone, the handset is a device the user holds to the ear to hear the audio sound. Modern-day handsets usually contain the phone's microphone as well, but in early telephones the microphone was mounted directly on the telephone itself, which often was attached to a wall at a convenient height for talking. Handsets on such telephones were called receivers, a term that is often applied to modern-day handsets, also.

Telephony equipment
Telephone card

A telephone card, calling card or phone card for short, is a small plastic card, sized and shaped like a credit card, used to pay for telephone services. It is not necessary to have the physical card except with a stored-value system; knowledge of the access telephone number to dial and the PIN is sufficient.

Telecommunications economics Telephone services
Party line (telephony)

In twentieth-century telephone systems, a party line (also multiparty line or shared service line) was an arrangement in which two or more customers were connected directly to the same local loop. Prior to World War II in the United States, party lines were the primary way residential subscribers acquired local telephone service. British users similarly benefited from the party line discount.

Local loop
High-Speed Downlink Packet Access

High-Speed Downlink Packet Access (HSDPA) is an enhanced 3G (third generation) mobile telephony communications protocol in the High-Speed Packet Access (HSPA) family, also dubbed 3.5G, 3G+ or turbo 3G, which allows networks based on Universal Mobile Telecommunications System (UMTS) to have higher data transfer speeds and capacity. Current HSDPA deployments support down-link speeds of 42 megabit/s.

Universal Mobile Telecommunications System High-Speed Packet Access 3rd Generation Partnership Project standards
Modular connector

Modular connector is the name given to a family of electrical connectors originally used in telephone wiring and now used for many other purposes. Many applications that originally used a bulkier, more expensive connector have now migrated to modular connectors. Probably the most well known applications of modular connectors are for telephone jacks and for Ethernet jacks, both of which are nearly always modular connectors.

Networking hardware Ethernet Computer connectors Telephone connectors
Hybrid fibre-coaxial

Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network which combines optical fibre and coaxial cable. It has been commonly employed globally by cable television operators since the early 1990s.

Fiber-optic communications Broadband Digital cable
Telecommunications device for the deaf

A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter, TTY, textphone, and minicom. The typical TDD is a device about the size of a typewriter or laptop computer with a QWERTY keyboard and small screen that uses LEDs or an LCD screen to display typed text electronically.

Assistive technology Deafness
Transatlantic communications cable

A transatlantic telecommunications cable is a submarine communications cable running under the Atlantic Ocean. All modern cables use fiber optic technology. Most such cables follow the great circle route from London to New York City because of the high-speed requirements of international financial transactions. Financial trading firms spend billions of dollars annually to get an edge on trading http://online. wsj. com/article/SB10001424052970204524604576610860386189444. html.

History of the telephone Transatlantic communications cables
Project 25

Project 25 (P25 or APCO-25) is a suite of standards for digital radio communications for use by federal, state/province and local public safety agencies in North America to enable them to communicate with other agencies and mutual aid response teams in emergencies. In this regard, P25 fills the same role as the European Terrestrial Trunked Radio (TETRA) protocol, although not interoperable with it.

Computer security exploits Telecommunications standards Trunked radio systems
Forever Changes

Forever Changes is the third album by American rock band Love, released by Elektra Records in November 1967. In 2003, Rolling Stone magazine ranked Forever Changes 40th in its list of the 500 greatest albums of all time. The album was inducted into the Grammy Hall of Fame in 2008. It was entered into the National Recording Registry in May 2012.

Albums produced by Arthur Lee Elektra Records albums Albums produced by Bruce Botnick English-language albums Love albums Rhino Records albums 1967 albums
Crisis hotline

A crisis hotline is a phone number people can call to get immediate emergency telephone counseling, usually by trained volunteers. Such hotlines have existed in most major cities of the United States at least since the mid-1970s. Initially set up to help those contemplating suicide, many have expanded their mandate to deal more generally with emotional crises.

Telephone numbers Suicide prevention Helplines
Acoustic coupler

In telecommunications, the term acoustic coupler has the following meanings: An interface device for coupling electrical signals by acoustical means—usually into and out of a telephone instrument. A terminal device used to link data terminals and radio sets with the telephone network.

Modems Network access
Postal, telegraph and telephone service

A postal, telegraph, and telephone service (or PTT) is a government agency responsible for postal mail, telegraph, and telephone services. Such monopolies existed in many countries, though not in North America or Japan. Many PTTs have been partially or completely privatized in recent years. In some of those privatizations, the PTT was renamed completely, whereas in others, the name of the privatized corporation has been only slightly modified, such as PT Telkom in Indonesia.

Postal system Telecommunications economics Telecommunications organizations Types of government agencies
Carbon microphone

The carbon microphone, also known as a carbon button microphone (or sometimes just a button microphone) or a carbon transmitter, is a sound-to-electrical signal transducer consisting of two metal plates separated by granules of carbon. One plate faces outward and acts as a diaphragm. When sound waves strike this plate, the pressure on the granules changes, which in turn changes the electrical resistance between the plates.

Audio amplifiers History of the telephone Microphones American inventions Thomas Edison
Moscow–Washington hotline

Long Range Surveillance

Long Range Surveillance (LRS) (pronounced "lurse") units are specially trained elite Surveillance units of the United States Army that are employed by Military Intelligence Units for gathering information from deep within hostile territories. Classic LRS employment is to infiltrate deep into enemy territory, construct a hide site, and provide continuous Surveillance / Special reconnaissance of an intelligence target of key interest.

Military units and formations by type Military intelligence collection
Headset (audio)

A headset is headphones combined with a microphone, or one headphone with a microphone. Headsets provide the equivalent functionality of a telephone handset with hands-free operation. Headsets typically have only one speaker like a telephone, but also come with speakers for both ears. They have many uses including in call centers and other telephone-intensive jobs and for anybody wishing to have both hands free during a telephone conversation.

Sound cards Computer peripherals
Interexchange carrier

An Interexchange Carrier (IXC) is a U.S. legal and regulatory term for a telecommunications company, commonly called a long-distance telephone company, such as MCI (before its absorption by Verizon), Sprint and the former AT&T (before its merger with SBC in 2005) in the United States. It is defined as any carrier that provides inter-LATA communication, where a LATA is a local access and transport area.

Telecommunications companies Telephony
Cofidis (cycling team)

Cofidis, Le Crédit en Ligne is a French professional road bicycle racing team sponsored by a money-lending company, Cofidis. It was started in 1996 by Cyrille Guimard the former manager of Bernard Hinault, Greg LeMond and Laurent Fignon of the Renault-Elf team of the 1980s. The team's sponsor has supported the team despite repeated problems such as doping scandals.

Sports clubs established in 1997 Cycling teams based in France UCI Professional Continental teams
Telephone numbers in the Dominican Republic

Area code 809 redirects here. 809 once covered Bermuda and many islands in the Caribbean which have since been allocated their own codes; see Area codes in the Caribbean for more details. Telephone numbers in the Dominican Republic use area code 809 with 829 and 849 as overlay codes.

Dominican Republic-related lists Area codes in the Caribbean Fraud Communications in the Dominican Republic Telephone numbers by country
Computer telephony integration

Computer telephony integration, also called computer–telephone integration or CTI, is a common name for any technology that allows interactions on a telephone and a computer to be integrated or coordinated. The term is predominantly used to describe desktop-based interaction for helping users be more efficient, though it can also refer to server-based functionality such as automatic call routing.

Telephone service enhanced features Computer telephony integration
Pulse dialing

Pulse dialing, dial pulse, or loop disconnect dialing, also called rotary or decadic dialling in the United Kingdom (because up to 10 pulses are sent), is pulsing in which a direct-current pulse train is produced by interrupting a steady signal according to a fixed or formatted code for each digit and at a standard pulse repetition rate. Dial pulsing originated with a rotary dial integrated into telephone instruments, for the purpose of signaling.

Telephony signals Obsolete technologies

A helpline is a telephone service which offers help to those who call. Many helpline services now offer more than telephone support - offering access to information, advice or customer service via telephone, email, web or SMS. Hotline, is also sometimes used to refer to Helpline. Services include User Assistance (for example computer software support) telephone counseling, medical hotlines, insolvency hotlines, crisis hotlines and many other types of hotlines.

Information by telephone Helplines
Cable radio

Cable radio or cable FM is a concept similar to that of cable television, bringing radio signals into homes and businesses via coaxial cable. It is generally used as cable TV was in its early days when it was "community antenna television", to enhance the quality of terrestrial radio signals that are difficult to receive in an area. However, cable-only radio outlets also exist.

Cable radio
Secure voice

Secure voice (alternatively secure speech or ciphony) is a term in cryptography for the encryption of voice communication over a range of communication types such as radio, telephone or IP.

Speech codecs Cryptography Secure communication
Qwest Corporation

Qwest Corporation is a Bell Operating Company owned by CenturyLink. It was formerly named U S WEST Communications, Inc. from 1991 to 2000, and also formerly named The Mountain States Telephone and Telegraph Company from 1911 to 1991. It includes the former operations of Malheur Bell, Northwestern Bell and Pacific Northwest Bell as well. It is one of two of the original 22 Bell Operating Companies not to be owned by a Baby Bell formed in 1984.

Communications in Wyoming Communications in Nebraska Communications in Arizona Communications in Minnesota Communications in Iowa Bell System CenturyLink Communications in North Dakota Communications in Washington (state) Communications in Montana Companies based in Colorado Communications in Utah Communications in Colorado Companies established in 1911 Communications in New Mexico Communications in South Dakota Communications in Oregon Communications in Idaho
Network switching subsystem

Network switching subsystem (NSS) (or GSM core network) is the component of a GSM system that carries out call switching and mobility management functions for mobile phones roaming on the network of base stations. It is owned and deployed by mobile phone operators and allows mobile devices to communicate with each other and telephones in the wider Public Switched Telephone Network (PSTN).

GSM standard Telecommunications infrastructure
CTIA – The Wireless Association

Elisa Oyj

"HPY" redirects here. For the airport, see Baytown Airport. Elisa Oyj 180pxType Julkinen osakeyhtiöIndustry TelecommunicationsFounded 1882Headquarters Helsinki, FinlandKey people Risto Siilasmaa, Veli-Matti Mattila Products Retail and wholesale fixed-line and mobile telecommunications services, internet servicesRevenue €1.463 billion Operating income €268.0 million Profit €149.7 million Total assets €1.972 billion Total equity €832.9 million Employees 3,480 Website www. elisa.

Companies established in 1882 Companies of Finland Vodafone Companies based in Helsinki Former cooperatives 1882 establishments in Finland Companies listed on the Helsinki Stock Exchange
Telephone network

A telephone network is a telecommunications network used for telephone calls between two or more parties. There are a number of different types of telephone network: A fixed line network where the telephones must be directly wired into a single telephone exchange. This is known as the public switched telephone network or PSTN. A wireless network where the telephones are mobile and can move around anywhere within the coverage area.

Telecommunications infrastructure
Electronic Switching System

In telecommunications, an electronic switching system (ESS) is: A telephone exchange based on the principles of time-division multiplexing of digitized analog signals. An electronic switching system digitizes analog signals from subscriber loops, and interconnects them by assigning the digitized signals to the appropriate time slots. It may also interconnect digital data or voice circuits. A switching system with major devices constructed of semiconductor components.

Telephone exchanges

Robocall is a term for a phone call that uses a computerized autodialer to deliver a pre-recorded message, as if from a robot, hence the name. Robocalls are often associated with political and telemarketing phone campaigns, but can also be used for public-service or emergency announcements.

Neologisms Telemarketing

E.164 is an ITU-T recommendation that defines the international public telecommunication numbering plan used in the PSTN and some other data networks. It also defines the format of telephone numbers. E.164 numbers can have a maximum of fifteen digits and are usually written with a + prefix. To actually dial such numbers from a normal fixed line phone, the appropriate international call prefix must be used. The title of the original and revision 1 was "Numbering Plan for the ISDN Era".

Telephone numbers ITU-T recommendations Identifiers

Bezeq, the Israeli company for communications, is a telecommunications provider in Israel. Until the mid-first decade of the 21st century when it was owned by the Israeli government, Bezeq had a monopoly on landline telephony and Internet access infrastructure.

Israeli brands Companies listed on TASE Telecommunications companies of Israel
Mobile network

Pigeon John

Pigeon John is an American hip hop rapper raised in Hawthorne, California and based in Los Angeles, California.

Living people Quannum Projects artists Rappers from Nebraska American Christians Performers of Christian hip hop music People from Omaha, Nebraska
Analog telephone adapter

An analog telephony adapter, or analog telephone adapter, (ATA) is a device used to connect one or more standard analog telephones to a digital telephone system or a non-standard telephone system. An ATA usually takes the form of a small box with a power adapter, one Ethernet port, one or more FXS telephone ports and may also have a FXO link. Users can plug one or more standard analog telephone devices into the ATA and the analog device(s) will operate, usually transparently, on a VoIP network.

Article Feedback 5 VoIP hardware Telephony equipment
Invention of the telephone

The invention of the telephone is the culmination of work done by many individuals, the history of which involves a collection of claims and counterclaims. The development of the modern telephone involved an array of lawsuits founded upon the patent claims of several individuals.

Technology in society History of the telephone Discovery and invention controversies History of electronic engineering
Number Five Crossbar Switching System

The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though variants were used as combined class 4/5 in rural areas and as a TWX switch. 5XB was originally intended to bring the benefits of crossbar switching to small towns with only a few thousand telephone lines.

History of the telephone Telephone exchanges
Lawful interception

Lawful interception (LI) is obtaining communications network data pursuant to lawful authority for the purpose of analysis or evidence. Such data generally consist of signalling or network management information or, in fewer instances, the content of the communications. If the data are not obtained in real-time, the activity is referred to as access to retained data (RD). There are many bases for this activity that include infrastructure protection and cybersecurity.

Law enforcement agency powers VoIP terminology & concepts Surveillance Privacy of telecommunications
Speaking tube

A speaking tube or voicepipe is a device based on two cones connected by an air pipe through which speech can be transmitted over an extended distance. While its most common use was in intra-ship communications, the principle was also used in fine homes and offices of the 19th century, as well as fine automobiles, military aircraft, and even locomotives. For most purposes, the device was outmoded by the telephone and its widespread adoption.

Telephony History of telecommunications
Franks Wild Years

Franks Wild Years is an album by Tom Waits, released 1987 on Island Records. Subtitled "Un Operachi Romantico in Two Acts", the album contains songs written by Waits and collaborators (mainly his wife, Kathleen Brennan) for a play of the same name. The shared title of the album and the play is an iteration of "Frank's Wild Years", a song from Waits' 1983 album Swordfishtrombones. The play had its world premiere at the Briar St.

Tom Waits albums Tom Waits soundtracks Island Records albums 1987 albums
555 (telephone number)

Telephone numbers with the prefix 555 are widely used for fictitious telephone numbers in North American television shows, films, video games, and other media. Not all numbers that begin with 555 are fictional—for example, 555-1212 is one of the standard numbers for directory assistance throughout the United States and Canada.

Fictional telecom protocols Three-digit telephone numbers North American Numbering Plan In-jokes Cinema of the United States
Chinese whispers

Chinese whispers is one name for a game played around the world, in which one person whispers a message to another, which is passed through a line of people until the last player announces the message to the entire group. Errors typically accumulate in the retellings, so the statement announced by the last player differs significantly, and often amusingly, from the one uttered by the first.

Children's games Language games Party games
Class 4 telephone switch

A Class 4, or Tandem, telephone switch is a U.S. telephone company central office telephone exchange used to interconnect local exchange carrier offices for long distance communications in the Public Switched Telephone Network. A Class 4 switch doesn't connect directly to any telephones; instead, it connects to other Class 4 switches and to Class 5 telephone switches. The telephones of people who subscribe to telephone service are wired to Class 5 switches.

Telephone exchange equipment
Southern New England Telephone

The Southern New England Telephone Company (commonly referred to as SNET by its customers) is a local exchange carrier owned by AT&T. It started operations on January 27, 1878 as the District Telephone Company of New Haven. It was the founder of the first telephone exchange, as well as the world's first telephone book.

AT&T Bell System Telecommunications companies of the United States Companies established in 1878 Defunct companies based in Connecticut
Telephone banking

Telephone banking is a service provided by a financial institution, which allows its customers to perform some banking transactions over the telephone. Most telephone banking services use an automated phone answering system with phone keypad response or voice recognition capability. To ensure security, the customer must first authenticate through a numeric or verbal password or through security questions asked by a live representative (see below).

Banking technology Banking Information by telephone
Class 5 telephone switch

A Class 5 telephone switch is a telephone switch or telephone exchange in the Public Switched Telephone Network located at the local telephone company's central office, directly serving subscribers. Class 5 switch services include basic dial-tone, calling features, and additional digital and data services to subscribers using the local loop. Class 5 switches were slower to convert from circuit switching technologies to time division multiplexing than the other switch classes.

Telephone exchange equipment
Claro Puerto Rico

Claro (formerly Puerto Rico Telephone) is the largest Puerto Rican telecommunications services company. It is headquartered in Guaynabo, Puerto Rico, and has operated for almost a century offering voice, data, long distance, broadband, directory publishing and wireless services for the island residents and businesses. It was founded by the brothers Behn, Sosthenes and Hernan. Originally, Puerto Rico Telephone Company eventually spawned ITT Corporation, which was founded by Sosthenes Behn.

Telecommunications companies of Puerto Rico Internet service providers of Puerto Rico
Telephone keypad

A telephone keypad is a keypad that appears on a "Touch Tone" telephone. It was standardised when the dual-tone multi-frequency system in the new push-button telephone was introduced in the 1960s, which gradually replaced the rotary dial. The contemporary keypad is laid out in a 4×3 grid, although the original DTMF system in the new keypad had an additional column for four now-defunct menu selector keys.

Telephone numbers Telephony equipment
Telecommunications Relay Service

Telecommunications Relay Service, also known as TRS, Relay Service, or IP-Relay, or Web-based relay services, is an operator service that allows people who are Deaf, Hard-of-Hearing, Speech-Disabled, or DeafBlind to place calls to standard telephone users via a keyboard or assistive device. Originally, relay services were designed to be connected through a TDD (TTY) or other assistive telephone device.

Telephony Telecommunications Assistive technology Deafness
Southern Bell

Southern Bell Telephone and Telegraph Company was the Bell Operating Company serving the states of Georgia, Florida, North Carolina and South Carolina prior to the divestiture. Southern Bell began 1879 as The Atlanta Telephonic Exchange and was based in Atlanta. It changed its name to Southern Bell. Southern Bell also operated in Charleston and other parts of West Virginia from 1883 until 1917, when The Chesapeake and Potomac Telephone Company of West Virginia took over operations.

Companies established in 1879 AT&T Bell System 1983 disestablishments
British telephone sockets

British telephone sockets were introduced in their current plug and socket form on 19 November 1981 by British Telecom to allow subscribers to connect their own telephones. The connectors are specified in British Standard BS 6312. Electrical characteristics of the telephone interface are specified by individual network operators, e.g. in British Telecom's SIN 351. Electrical characteristics required of British telephones used to be specified in BS 6305.

BT Group Telephone connectors Telecommunications equipment
Digital telephony

Digital telephony is the use of digital electronics in the provision of digital telephone services and systems. Since the 1960s a digital core network has almost entirely replaced the old analog system, and much of the access network has also been digitized. Digital telephony was introduced to provide voice services at lower cost, but was then found to be of great value to new network services such as ISDN that could use digital facilities to transfer data speedily over telephone lines.

Telecommunications systems
Bucharest Telephone Palace

Bucharest Telephone Palace is an office building located on Calea Victoriei in Bucharest, Romania. It serves as the headquarters of Romtelecom.

Buildings and structures in Bucharest Buildings and structures completed in 1933 Art Deco architecture Historic monuments in Bucharest
Verizon Building

The Verizon Building is a 32-story Art Deco building in New York City, located in Lower Manhattan. It is named for Verizon Communications, for which it is the headquarters. The building is located at 140 West Street, adjacent to the World Trade Center site and 7 World Trade Center, and is bounded by Barclay, Washington, and Vesey Streets. The building experienced major damage in the September 11, 2001 attacks.

Buildings and structures on the National Register of Historic Places in Manhattan Buildings and structures completed in 1927 Skyscrapers in New York City Art Deco architecture in New York City Telecommunications company headquarters in the United States Office buildings in New York City Verizon Communications Office buildings in Manhattan Telecommunications buildings on the National Register of Historic Places Landmarks in Manhattan Telephone exchange buildings

The photophone (also known as a radiophone) is a telecommunications device which allowed for the transmission of both articulated sounds and normal human conversations on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at Bell's 1325 'L' Street laboratory in Washington, D.C. Both were later to become full associates in the Volta Laboratory Association, created and financed by Bell.

Optical communications History of the telephone Alexander Graham Bell History of telecommunications

PhonepayPlus (formerly known as ICSTIS, the Independent Committee for the Supervision of Standards of the Telephone Information Services) is the regulatory body for all premium rate phone-paid services in the United Kingdom. These are the goods and services that consumers can buy by charging the cost to their phone bills and pre-pay phone accounts.

Communications authorities Telecommunications in the United Kingdom
Telephone box

Telephone plug

A telephone plug is a type of male connector used to connect a telephone to the telephone wiring in a home or business, and in turn to a local telephone network. It is inserted into its female counterpart, a telephone "jack", commonly affixed to a wall or baseboard. The standard for telephone plugs varies from country to country, though the RJ11 "modular connector" has become by far the most common.

Telephone connectors
Local number portability

Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("Service Provider Portability"), move it to another location ("Geographic Portability"), or change the type of service ("Service Portability").

Telephone numbers Mobile technology
Network interface device

In telecommunications, a Network Interface Device (NID) is a device that serves as the demarcation point between the carrier's local loop and the customer's premises wiring. Generically, an NID may also be called a Network Interface Unit (NIU), Telephone Network Interface (TNI), or telephone network box. A smartjack is a type of NID with capabilities beyond simple electrical connection, such as diagnostics.

Local loop Telecommunications terms
Non-geographic telephone numbers in the United Kingdom

In the United Kingdom, non-geographic numbers (NGNs) are telephone numbers available for private sale which, rather than being assigned to a particular telephone line or circuit, provide callers with a contact number which gives no indication as to the geographical location of the line being called.

Telephone numbers in the United Kingdom

ConTel Corporation (Continental Telephone) was the third largest independent phone company in the United States prior to the 1996 telecom deregulation. It was acquired by GTE in 1991.

Companies based in Atlanta, Georgia Telecommunications companies of the United States Verizon Communications
Secrecy of correspondence

The secrecy of correspondence or literally translated as secrecy of letters, is a fundamental legal principle enshrined in the constitutions of several European countries. It guarantees that the content of sealed letters is never revealed and letters in transit are not opened by government officials or any other third party. It is thus the main legal basis for the assumption of privacy of correspondence.

Postal system Privacy of telecommunications Freedom of expression Privacy
Telephone numbers in South Africa

Country Code: +27 International Call Prefix: 00 Trunk Prefix: 0 South Africa has switched to a closed numbering system. From 16 January 2007 it became mandatory to dial the full 10 digit telephone number including the three-digit area code even for local calls. The trunk prefix is still '0', with the system generally organised geographically. All telephone numbers are 10 digits long (including the 3 for area code), except for certain Telkom special services.

Telephone numbers by country Telecommunications in South Africa South Africa-related lists
Hawaiian Telcom

Hawaiian Telcom, Inc. is the incumbent local exchange carrier (ILEC) or dominant local telephone company, serving the state of Hawaii. It is owned by Hawaiian Telcom Holdco, Inc. , which was formed in 2005 by The Carlyle Group, following its purchase of the Hawaii assets of Verizon Communications. They had been known as Verizon Hawaii, Inc. , and previously as GTE Hawaiian Telephone Company, Inc. , Hawaiian Telephone Company and Mutual Telephone Company.

Companies established in 1883 Private equity portfolio companies Verizon Communications Telecommunications companies of the United States Privately held companies based in Hawaii Carlyle Group companies Companies that have filed for Chapter 11 bankruptcy Companies based in Hawaii

Airfone is a brand of air-ground radiotelephone service offered by Verizon. Airfone allows passengers to make telephone calls in-flight. It was originated by John D. Goeken (who also founded MCI Communications and FTD's Mercury Network) in the 1970s. Western Union purchased a fifty percent share in Airfone in 1981 and sold to GTE in 1986 for US$39 million cash. Delta Air Lines offered the United States's first public air-to-ground telephone system with Airfone.

Avionics Mobile radio telephone systems Telephone services Verizon Communications
Automatic Electric

Automatic Electric Company (AE) was a telephone equipment supplier for independent telephone companies, comparable to the Bell System's Western Electric. It was located in Northlake, Illinois, with research and development labs in Melrose Park and Elmhurst, Illinois. The Automatic Telephone and Electric Co operated a manufacturing plant in Liverpool, England, that began as a licensed manufacturer for Automatic Electric.

Defunct companies based in Illinois Defunct telecommunications companies of the United States Companies based in Cook County, Illinois Elliott Cresson Medal recipients
Director telephone system

The Director System was a system which made it possible to call subscribers at other telephone exchanges without operator intervention in large multi-exchange cities, and to have a mixture of automatic and manual exchanges within these cities. It was introduced to six cities in the UK from 1927, starting with London, following the introduction of the automatic telephone exchange in the UK in 1912.

History of telecommunications Telephone exchanges
BellSouth Telecommunications

BellSouth Telecommunications, LLC is an operating company of AT&T that serves the southeastern United States. It consists of the former operations of Southern Bell and South Central Bell. BellSouth Telecommunications is a subsidiary of BellSouth Corporation which was acquired by AT&T Inc. on December 29, 2006; it continues as an indirect subsidiary of AT&T as a direct subsidiary of BellSouth.

Communications in Louisiana Communications in Georgia (U.S. state) AT&T Communications in Tennessee Communications in North Carolina Companies based in Atlanta, Georgia Communications in Mississippi Communications in Kentucky Communications in South Carolina Telecommunications companies of the United States Communications in Alabama Communications in Florida Companies established in 1983
NewTel Communications

NewTel Communications was a telephone, internet and cellular service provider in the Canadian province of Newfoundland and Labrador. Originally, as the Avalon Telephone Company, it served the Avalon Peninsula; it became the Newfoundland Telephone Company, also serving southwestern Newfoundland (between Port-aux-Basques and Corner Brook), part of the Burin Peninsula, Windsor and Grand Falls, as well as most of Labrador, as a result of acquisitions of three smaller companies from 1948 to 1962.

Bell Aliant Companies based in Newfoundland and Labrador
Mobile phones and driving safety

Mobile phone use while driving is common, but widely considered dangerous. Due to the number of accidents that are related to cell phone use while driving, some jurisdictions have made the use of a cell phone while driving illegal. Others have enacted laws to ban handheld mobile phone use, but allow use of a handsfree device. In some cases restrictions are directed only to minors or those who are newly qualified license holders.

Hazardous motor vehicle activities Road safety Public health Traffic law Mobile telecommunications
Telephone numbers in Curaçao and the Caribbean Netherlands


020 is the dialling code for London in the United Kingdom.

Telephone numbers in the United Kingdom

nTelos is a wireless telecommunications company based in Waynesboro, Virginia, United States. nTelos is a provider of PCS services to customers.

Mobile phone companies of the United States Companies established in 1897 Communications in West Virginia Companies based in Virginia Telecommunications companies of the United States Companies that have filed for Chapter 11 bankruptcy
New England Telephone

System X (telephony)

System X was the name of the UK's first national digital telephone exchange system.

Telephone exchange equipment Telecommunications in the United Kingdom General Electric Company plc 1980 introductions BT Group
Beggars (album)

Beggars is the sixth studio album by American rock band Thrice. It was released digitally through Vagrant Records in the UK on August 9, 2009 and in the US on August 11, 2009. A physical release containing bonus material was released on September 15, 2009.

Vagrant Records albums 2009 albums Thrice albums
Extension (telephone)

An extension telephone is an additional telephone wired to the same telephone line as another. In middle 20th century telephone jargon, the first telephone on a line was a "Main Station" and subsequent ones "Extensions". Such extension phones allow making or receiving calls in different rooms, for example in a home. Some telephones intended for use as extensions have built in intercom features.

Local loop Telephony equipment
Hanging on the Telephone

"Hanging on the Telephone" is a song written by Jack Lee and first performed by Lee's short-lived US West Coast power pop trio The Nerves, who placed it as the lead-off track on their 1976 EP, the band's only release. New Wave band Blondie popularised the song when it was released as the second single off Parallel Lines in both the U.S. and the UK, eventually reaching number 5 in the UK in November 1978 as well as inspiring other cover versions.

Blondie songs Songs produced by Mike Chapman Songs about telephones Songs written by Jack Lee (musician) 1978 songs
Telephone number mapping

Telephone number mapping is the process of unifying the telephone number system of the public switched telephone network with the Internet addressing and identification name spaces. Telephone numbers are systematically organized in the E.164 standard, while the Internet uses the Domain Name System for linking domain names to IP addresses and other resource information.

Telephone numbers
Obscene phone call

An obscene phone call is an unsolicited telephone call where a person derives sexual pleasure by using sexual or foul language to an unknown person. Making obscene telephone calls for sexual pleasure is known as telephone scatologia and is considered a form of exhibitionism.

Crimes Paraphilias Sex crimes Telephone crimes
NSA call database

The United States' National Security Agency (NSA) maintains a database containing hundreds of billions of records of telephone calls made by U.S. citizens from the four largest telephone carriers in the United States: AT&T, SBC, BellSouth (all three now called AT&T), and Verizon. The existence of this database and the NSA program that compiled it was unknown to the general public until USA Today broke the story on May 10, 2006.

Surveillance Law enforcement databases in the United States Counter-terrorism policy of the United States George W. Bush administration controversies Privacy of telecommunications National Security Agency Mass surveillance Government databases in the United States Surveillance scandals

Ohio Bell

The Ohio Bell Telephone Company is the Bell Operating Company serving most of Ohio. It is a wholly owned subsidiary of AT&T. Its headquarters is the Ohio Bell Building at 750 Huron Road, Cleveland, Ohio. Ohio Bell is not affiliated with Cincinnati Bell, which serves Cincinnati and other surrounding communities. After the 1984 Bell System Divestiture, Ohio Bell became a part of Ameritech, one of the seven original Regional Bell Operating Companies.

AT&T Bell System Telecommunications companies of the United States Companies based in Cleveland, Ohio Companies established in 1922
TOT (Thailand)

TOT Public Company Limited (ทีโอที) is a Thai state-owned telecommunications company. Originally established in 1954 and corporatized in 2002, TOT used to be known as the Telephone Organization of Thailand and TOT Corporation Public Company Limited. TOT's main line of business is fixed line telephony, although it has several other businesses, including mobile telephony. Its current Chairman of the Board of Directors is Panthep Jamradroamrun.

Mobile phone companies of Thailand

The non-emergency telephone number 3-1-1 is a special N-1-1 telephone number in many communities in Canada and the United States that provides quick, easy-to-remember access to non-emergency municipal services or a Citizen Service Center. Dialing this number allows city residents (only in certain cities) to obtain important non-emergency services through a central, all-purpose phone number quickly and effectively.


SystemYearFrequencyCoax per cableDistance between repeatersVoice circuits per coax tube L-119413 MHz48 miles600 L-21942840 kHz416 miles360 L-319508 MHz84 miles1,860 L-4196717 MHz202 miles3,600 L-5197257 MHz221 mile10,800 L-5E197566 MHz221 mile13,200 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.

Michigan Bell

Michigan Bell is the subsidiary of AT&T serving the state of Michigan. Following the Bell System divestiture on January 8, 1982, the company became a subsidiary of Ameritech, the Regional Bell operating company that served the midwestern United States. Ameritech was subsequently acquired by SBC Communications, which later changed its name to AT&T.

Companies based in Detroit, Michigan AT&T Bell System Telecommunications companies of the United States
Virtual number

A virtual number is a telephone number without a directly associated telephone line. Usually these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers chosen by the client; either Fixed, Mobile or VoIP. Subscribers to virtual numbers may use their existing phones, without the need to purchase additional hardware. A Virtual Private Number is a telephone number that forwards incoming calls to any of a number of pre-set telephone numbers.

Telephone numbers
Digital television adapter

A digital television adapter (DTA), or digital-to-analog converter [set-top box], or commonly known as a converter box, it is a television tuner that receives a digital television (DTV) transmission, and converts the digital signal into an analog signal that can be received and displayed on an analog television set. It may refer to over-the-air broadcast television signals received by an television antenna, or to cable TV systems which switched to digital cable.

Consumer electronics Digital television Television technology Television terminology Film and video technology History of television
Traffic Service Position System

Traffic Service Position System (TSPS) was developed by Bell Labs in Columbus, Ohio to replace traditional cord switchboards. The first TSPS was deployed in 1969 and used the Stored Program Control-1A CPU, "Piggyback" twistor memory (a proprietary technology developed by Bell Labs similar to core memory) and IGFET Insulated Gate Field Effect Transistor solid state memory devices similar to DRAM Dynamic Random Access Memory.

History of the telephone
Telephony Application Programming Interface

The Telephony Application Programming Interface (TAPI) is a Microsoft Windows API, which provides computer telephony integration and enables PCs running Microsoft Windows to use telephone services. Different versions of TAPI are available on different versions of Windows. TAPI allows applications to control telephony functions between a computer and telephone network for data, fax, and voice calls. It includes basic functions, such as dialing, answering, and hanging up a call.

Telephony Microsoft application programming interfaces
Modification of Final Judgment

In United States telecommunication law, Modification of Final Judgment (MFJ) is the August 1982 agreement approved by the court settling United States v. AT&T, a landmark antitrust suit, originally filed on January, 14, 1949 and modifying the previous Final Judgment of January 24, 1956.

Bell System United States communications regulation 1982 in United States case law
Telephone hybrid

Telephone hybrids are an essential functional component of the Public Switched Telephone Network (PSTN). The term also describes the piece of equipment used in broadcast facilities to enable the airing of telephone callers. The need for hybrids comes from the nature of analog plain old telephone service home or small business telephone lines, where the two audio directions are combined on a single two-wire pair.

Broadcast engineering Telephony equipment

MSISDN (pronounced /'mɪzdən/) is a number uniquely identifying a subscription in a GSM or a UMTS mobile network. Simply put, it is the telephone number to the SIM card in a mobile/cellular phone. This abbreviation has several interpretations, the most common one being "Mobile Subscriber Integrated Services Digital Network Number". The MSISDN together with IMSI are two important numbers used for identifying a mobile subscriber. The latter identifies the SIM, i.e.

Telephone numbers ITU-T recommendations Identifiers
Telephone exchange names

During the early years of telephone service, communities that required more than 10,000 telephone numbers, whether dial service was available or not, utilized exchange names to distinguish identical numerics for different customers. When dial service was introduced (typically during the period of 1910 to 1970), in such multiple exchange communities, customers would normally dial the first two or three letters of the exchange name, followed by the numeric digits.

Telephone numbers

NBTel was founded as the New Brunswick Telephone Company in 1888 after Bell Telephone Company of Canada's attempt to establish telephone service in the Maritime provinces failed. The company purchased the assets in New Brunswick, Canada from Bell Canada in 1889. In 1973, NBTel purchased the last independent telephone operator in New Brunswick, giving it a monopoly for the telephone service.

Bell Aliant Companies based in Saint John, New Brunswick Telecommunications companies of Canada

The lovebug, Plecia nearctica, is a member of the family of march flies. It is also known as the honeymoon fly, kissingbug, or double-headedbug. The adult is a small, flying insect common to parts of Central America and the southeastern United States, especially along the Gulf Coast. During and after mating, adult pairs remain coupled, even in flight, for up to several days. The lovebug was first described in 1940 by D. E. Hardy from Galveston, Texas.

Animals described in 1940 Bibionidae
Model 500 telephone

The Western Electric model 500 telephone series was the standard desk-style domestic telephone set issued by the Bell System in North America from late 1949 through the 1984 Bell System divestiture. Millions of model 500-series phones were produced and were present in almost every home in North America. Many are still in use today thanks to their durability and ample availability.

Telephony equipment Western Electric telephones
UK telephone code misconceptions

Widespread UK telephone code misconceptions, in particular brought on by the Big Number Change in 2000, have been reported by regulator Ofcom since publication of a report it commissioned in 2004.

Misconceptions Telephone numbers in the United Kingdom
AXE telephone exchange

The AXE telephone exchange is a product line of circuit switched digital telephone exchanges manufactured by Ericsson, a Swedish telecom company. It was developed in 1974 by Ellemtel, a research and development subsidiary of Ericsson and Televerket. The first system was deployed in 1976. AXE is an acronym for Automatic Cross-Connection Equipment. The AXE is the digital successor to the AKE analogue telephone exchange and ARF/ARM family of crossbar switches.

Ericsson Telephone exchange equipment
900 number

111 (emergency telephone number)

111 (usually pronounced one-one-one) is the emergency telephone number in New Zealand. It was first implemented in Masterton and Carterton on 29 September 1958, and was progressively rolled out nationwide with the last exchanges converting in 1988. In 2008, 111 celebrated fifty years of service.

Telecommunications in New Zealand Three-digit telephone numbers Emergency telephone numbers
Cable telephony

Cable telephony is a form of digital telephony over cable TV networks. A telephone interface installed at the customer's premises converts analog signals from the customer's in-home wiring to a digital signal, which is then sent over the cable connection to the company's switching center. The signal is then sent on to the public switched telephone network (PSTN).

Telephony Cable television technology
Independent telephone company

An Independent telephone company in the United States was a telephone company providing local service that was not part of the Bell System group of companies, "Ma Bell", before the 1984 Bell System divestiture or breakup of the Bell system. They usually operated in rural or less densely populated areas than those of the Bell operating companies.

Article Feedback 5 History of telecommunications in the United States 1894 in the United States
The Bell Laboratory Science Series

The Bell Laboratory Science Series consists of nine television specials made for the AT&T Corporation that were originally broadcast in color between 1956 and 1964. Marcel LaFollette has described them as "specials that combined clever story lines, sophisticated animation, veteran character actors, films of natural phenomena, interviews with scientists, and precise explanation of scientific and technical concepts — all in the pursuit of better public understanding of science.

Documentary films about science Bell Labs

Field telephone

Field telephones are mobile telephones intended for military use, designed to withstand wartime conditions. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powered telephones. Field telephones were first used in the First World War to direct troops. They replaced flag signals and the telegraph as an efficient means of communication.

Military communications Telephony equipment
Undersea cable

Telephone Consumer Protection Act of 1991

The Telephone Consumer Protection Act of 1991 (TCPA) was passed by the United States Congress in 1991 and signed into law by President George H. W. Bush as Public Law 102-243. It amended the Communications Act of 1934. The TCPA is codified as 47 U.S.C. 227. The TCPA restricts telephone solicitations and the use of automated telephone equipment. The TCPA limits the use of automatic dialing systems, artificial or prerecorded voice messages, SMS text messages, and fax machines.

1991 in law Privacy law United States federal communications legislation Telemarketing
Push-button telephone

The push-button telephone was first invented in 1941, and is a telephone with push-buttons or keys, and which eventually replaced rotary dial telephones that were first used in 1891. The first push-button telephone was invented in the labs of Bell Telephone; however, these models were only prototypes, and were not brought to the commercial market. The first publicly-available push-button telephone was released in 1963, by the Bell System.

Telephony equipment
Switchboard operator

In the early days of telephony, through roughly the 1960s, companies used manual telephone switchboards and switchboard operators connected each call by inserting a pair of phone plugs into the appropriate jacks. Each pair of plugs was part of a cord circuit with a switch associated that let the operator participate in the call. Each jack had a light above it that lit when the telephone receiver was lifted (the earliest systems required a generator on the phone to be cranked by hand).

Business and financial operations occupations
Improved Mobile Telephone Service

The Improved Mobile Telephone Service (IMTS) is a "0G" pre-cellular VHF/UHF radio system that links to the PSTN. IMTS was the radiotelephone equivalent of land dial phone service. It was introduced in 1964 as a replacement to Mobile Telephone Service or MTS and improved on most MTS systems by offering direct-dial rather than connections through an operator.

Telecommunications in Canada Telecommunications in the United States
Telephone number portability

Reverse telephone directory

A reverse telephone directory (also known as a gray pages directory, criss-cross directory or reverse phone lookup) is a collection of telephone numbers and associated customer details.

Telephone numbers Directories Searching
List of Frontier Communications operating companies

Frontier Communications owns local telephone operating companies consisting of companies it has owned under its previous name Citizens Communications Company, companies it acquired from Global Crossing, and companies it acquired from Verizon Communications which are grouped under its subsidiary Frontier Communications ILEC Holdings. The companies operate in largely rural areas (with a few exceptions).

Frontier Communications
Illinois Bell

Illinois Bell Telephone Company is the name of the Bell Operating Company serving Illinois. It is owned by AT&T through AT&T Teleholdings, formerly Ameritech. Their headquarters are at 225 West Randolph St. , Chicago, IL. After the 1984 Bell System Divestiture, Illinois Bell became a part of Ameritech, one of the 7 original Regional Bell Operating Companies.

Companies based in Chicago, Illinois AT&T Bell System Telecommunications companies of the United States Companies established in 1920
Tachyonic antitelephone

A tachyonic antitelephone is a hypothetical device in theoretical physics that could be used to send signals into one's own past. Albert Einstein in 1907 presented a thought experiment of how faster-than-light signals can lead to a paradox of causality, which was described by Einstein and Arnold Sommerfeld in 1910 as a means "to telegraph into the past". The same thought experiment was described by Richard Chace Tolman in 1917, therefore it is also known as Tolman's paradox.

Tachyons Special relativity Physical paradoxes

National Telephone Company

The National Telephone Company (NTC) was a British telephone company from 1881 until 1911 which brought together smaller local companies in the early years of the telephone. Under the Telephone Transfer Act 1911 it was taken over by the General Post Office (GPO) in 1912.

Alexander Graham Bell Archives in London Companies established in 1881 Business and industry archives Defunct telecommunications companies of the United Kingdom
Telegrapher's equations

The telegrapher's equations (or just telegraph equations) are a pair of linear differential equations which describe the voltage and current on an electrical transmission line with distance and time. The equations come from Oliver Heaviside who in the 1880s developed the transmission line model which is described in this article. The model demonstrates that the electromagnetic waves can be reflected on the wire, and that wave patterns can appear along the line.

Hyperbolic partial differential equations Distributed element circuits
Telephone slamming

Telephone slamming is an illegal telecommunications practice, in which a subscriber's telephone service is changed without their consent. Slamming became a more visible issue after the deregulation of the telecommunications industry in the mid-1980s, especially after several brutal price wars between the major telecommunications companies. The term slamming was coined by Mick Ahearn who was a consumer marketing manager at AT&T in September 1987.

Consumer fraud Telemarketing
Pacific Northwest Bell

Pacific Northwest Bell Telephone Company was an AT&T majority-owned Bell System company that provided local telecommunications services in Oregon, Washington, and northern Idaho. Pacific Northwest Bell Telephone Company was formed on July 1, 1961 when it was spun off from the Pacific Telephone and Telegraph Company. On January 1, 1984, Pacific Northwest Bell was split from AT&T as ordered in the settlement of United States v.

Bell System Companies established in 1961 CenturyLink Companies disestablished in 1991
Standing Outside a Broken Phone Booth with Money in My Hand

"Standing Outside a Broken Phone Booth With Money in My Hand" is an alternative rock song by the band Primitive Radio Gods. The song appeared on the band's major-label debut album, Rocket, in June 1996, and became a popular radio hit over the next few months, reaching #10 on Hot 100 Airplay in September 1996. Its chorus consists of a sample from the 1964 B. B. King song "How Blue Can You Get": "I've been downhearted baby, ever since the day we met.

Billboard Alternative Songs number-one singles Primitive Radio Gods songs Rock ballads 1996 songs 1996 singles English-language songs 1990s ballads Columbia Records singles Alternative rock songs Debut singles Songs about telephone calls
Telephone counseling

Telephone counseling refers to any type of psychological service performed over the telephone. Telephone counseling ranges from individual, couple or group psychotherapy with a professional therapist to psychological first aid provided by para-professional counselors.

Psychotherapy Counseling Helplines
Candlestick telephone

The candlestick telephone is a style of telephone that was common from the late 1890s to the 1930s.

Telephony equipment Western Electric telephones
Trimline telephone

The Western Electric Trimline telephone is a variety of telephone set designed by Donald Genaro of Henry Dreyfuss Associates for the Bell System. It was built by the Bell System's manufacturing arm, Western Electric. The idea behind the Trimline telephone was to create an alternative telephone set design that was stylish and easier to use than a traditional telephone.

Western Electric telephones
PacBell Building

The PacBell Building or 140 New Montgomery Street in San Francisco's South of Market district is a Neo-Gothic, 132.6 m (435 ft) office tower located close to the St. Regis Museum Tower and the San Francisco Museum of Modern Art. The 26-floor building was completed in 1925 and was San Francisco's first significant skyscraper development when construction began in 1924. The building was the tallest in San Francisco until the Russ Building matched its height two years later in 1927.

Buildings and structures completed in 1925 Office buildings in San Francisco, California Skyscrapers between 100 and 149 meters Art Deco architecture in California Skyscrapers in San Francisco, California

NorthernTel (formerly Northern Telephone Limited or NTL) is a telephone company in Ontario, Canada. NorthernTel began in April 1905 in New Liskeard, Ontario, as the Temiskaming Telephone Company. It grew by buying other regional telephone providers and became the Northern Telephone Company Ltd. in 1928. Over the years, the company expanded into Northwestern Ontario and Northwestern Quebec. These assets were later sold to Bell Canada (1969) and Télébec (1976), respectively.

Bell Aliant Companies established in 1905 Telecommunications companies of Canada
International call

International telephone calls are those made between different countries. These telephone calls are processed by international gateway exchanges (switches). Charges for these calls were high initially but declined greatly during the 20th century due to advances in technology and liberalization. Originally they were placed via long-distance operators. The calls were transmitted by cable, communications satellite, radio, and more recently, fiber optics and Voice over Internet Protocol (VoIP).

Telecommunication services
Bell Telephone Memorial

The Bell Telephone Memorial, also known as the Bell Memorial, is a monument commemorating the invention of the telephone by Alexander Graham Bell in July 1874 at his parent's home, Melville House, in Brantford, Ontario, Canada. In 1906, the citizens of the Brantford and Brant County areas formed the Bell Memorial Association. In 1908, the association's designs committee asked sculptors on two continents to submit proposals for the memorial.

Buildings and structures completed in 1917 Historical markers Works by Walter Seymour Allward Buildings and structures in Brantford Alexander Graham Bell National Historic Sites in Ontario History of the telephone History of immigration to Canada Visitor attractions in the County of Brant Neoclassical movements Monuments and memorials in Ontario

Sidetone is audible feedback to someone who is speaking. The term is most used in telecommunication contexts.

Telephony equipment Radio terminology
Telephone number (mathematics)

In mathematics, the telephone numbers or involution numbers are a sequence of integers that count the number of ways that n subscribers to a telephone system can be linked in pairs, the number of matchings of a complete graph on n vertices, the maximum value of the Hosoya index of a molecule with n atoms, the number of self-inverse permutations on n elements, the sum of absolute values of coefficients of the Hermite polynomials, the number of Young tableaux with n cells, and the sum of the degrees of the irreducible representations of the symmetric group.

Factorial and binomial topics Enumerative combinatorics Integer sequences Permutations Matching
Emergency telephone

An emergency telephone is a phone specifically provided for making calls to emergency services and is most often found in a place of special danger or where it is likely that there will only be a need to make emergency calls. Emergency telephones are commonly found alongside major roads and on university campuses throughout the world.

Safety equipment Public phones Emergency road services Street furniture
Communications in Argentina

Communications in Argentina gives an overview of the postal, telephone, Internet, radio, television, and newspaper services available in Argentina.

Communications in Argentina

Wide Area Telephone Service

In U.S. telecommunications, a Wide Area Telephone Service (WATS) is a long distance service offering for customer dial-type telecommunications between a given customer [user user] station and stations within specified geographic rate areas employing a single telephone line between the customer user location and the serving central office. Each access line may be arranged for either outward (OUT-WATS) or inward (IN-WATS) service, or both.

Telecommunications in the United States
Indian Telephone Industries Limited

Indian Telephone Industries Limited is a state-owned manufacturer of telecommunications equipment in India. It was founded in 1948, and today has six manufacturing facilities which produce a range of switching, transmission, access and subscriber premises equipment. It is headquartered at Bengalooru (Bengaluru). It produces GSM mobile equipment at its Mankapur and Rae Bareli Plants. These two facilities supply more than nine million lines per annum to both domestic as well as export markets.

Economy of Karnataka Telecommunications companies of India Companies based in Bangalore Economy of Uttar Pradesh Companies established in 1948 1948 establishments in India
Elisha Gray and Alexander Bell telephone controversy

The Elisha Gray and Alexander Graham Bell controversy concerns the question of whether Bell or Gray invented the telephone independently and, if not, whether Bell stole the invention from Gray. This controversy is narrower than the question of who deserves credit for inventing the telephone, for which there are several claimants.

History of the telephone Discovery and invention controversies Alexander Graham Bell
Telephone numbers in Australia

Country Code: +61 International Call Prefix: 0011 Trunk Prefix: 0 The Australian telephone numbering plan describes the allocation of phone numbers in Australia. It has changed many times, the most recent major reorganisation by the Australian Communications Authority taking place between 1994 and 1998.

Telephone numbers in Australia Telephone numbers by country Australia-related lists
Computer-assisted telephone interviewing

Computer-assisted telephone interviewing (CATI) is a telephone surveying technique in which the interviewer follows a script provided by a software application. It is a structured system of microdata collection by telephone that speeds up the collection and editing of microdata and also permits the interviewer to educate the respondents on the importance of timely and accurate data.

Speaker recognition Labor terms Sociology index Market research Data collection
Northwestern Bell

Northwestern Bell Telephone Company served the states just north of the Southwestern Bell area, including: Iowa, Minnesota, South Dakota, North Dakota, and Nebraska.

Bell System CenturyLink Companies disestablished in 1991
History of the telephone

This history of the telephone chronicles the development of the electrical telephone, and includes a brief review of its earlier predecessors.

History of the telephone
Southern New England Telecommunications

Southern New England Telecommunications Corporation started operations in 1986 as the holding company for The Southern New England Telephone Company. Prior to 1986, The Southern New England Telephone Company had been a minority holding of AT&T until February 1986, when AT&T withdrew its 23% holding.

2006 disestablishments AT&T Companies established in 1986 Communications in Connecticut
Maritime Telephone and Telegraph Company

Maritime Telephone and Telegraph Company (MT&T, later MTT) was founded around 1910 in Halifax, Nova Scotia and provided telecommunications solutions to Nova Scotia until 1998 when it merged with Island Telecom, NBTel, and NewTel Communications to form Aliant. Many payphones in Nova Scotia are still MTT-branded.

Companies based in the Halifax Regional Municipality Bell Aliant Telegraph companies Telecommunications companies of Canada
Telephone numbers in Spain

The Spanish telephone numbering plan describes the allocation of telephone numbers in Spain. It is regulated by CMT (Comisión del Mercado de las Telecomunicaciones).

Spain-related lists Telephone numbers by country Communications in Spain
Sound-powered telephone

A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power. This technology has been used for at least six decades for both routine and emergency communication on ships to allow communication between key locations on a vessel even if power, including batteries, is no longer available.

Telephony equipment
Frontier West Virginia

Frontier West Virginia, Inc. is one of the original Bell Operating Companies and provides local telephone service in West Virginia.

Communications in West Virginia Bell System Companies established in 1917 Frontier Communications Telecommunications companies of the United States History of telecommunications in the United States
Stentor Alliance

The Stentor Alliance is a formal alliance of Canada's major telecommunications companies, specifically its incumbent local exchange carriers. It derives its name from the Greek mythological figure Stentor.

Telecommunications companies of Canada
Bangladesh Telegraph and Telephone Board

The Bangladesh Telegraph and Telephone (T&T) Department was created in 1971. Today 'BTTB' provides land-line telephone services in the urban areas, domestic long-distance and international services. Though the Bangladeshi government has given out nationwide PSTN licences the lucrative Dhaka market (which account for majority of the nationwide market) is still under the monopoly of BTTB.

Telecommunications companies of Bangladesh
Routing in the PSTN

Routing in the PSTN is the process used to route telephone calls across the public switched telephone network. This process is the same whether the call is made between two phones in the same locality, or across two different continents.

Routing Teletraffic
Mobile phone jammer

A mobile phone jammer is an instrument used to prevent cellular phones from receiving signals from base stations. When used, the jammer effectively disables cellular phones. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected.

Mobile telecommunications
List of dialling codes in the United Kingdom

This is a list of telephone dialling codes in the United Kingdom. It is based on Ofcom's area code list, but includes defunct codes and historical changes, including the derivation of the two letter identities where known. Note that dialling codes do not correspond to any geographical boundaries, so for example the Coventry dialling code covers a large area of Warwickshire and the Manchester dialling code covers part or all of several neighbouring towns.

Telephone numbers by country United Kingdom-related lists Telephone numbers in the United Kingdom
Thunder Bay Telephone

Thunder Bay Telephone is a municipally owned telecommunications company operating in Thunder Bay, Ontario, Canada, and the surrounding area. The company uses the marketing name TBayTel in advertisements and official communications. TBayTel contributes over $20M to the city of Thunder Bay. The first phone call in Thunder Bay took place in 1902, and Thunder Bay Telephone was formed to connect the communities of Port Arthur and Fort William.

Mobile phone companies of Canada Companies based in Thunder Bay Municipally owned companies in Canada
Dedicated line

In computer networks and telecommunications, a dedicated line is a communications cable or other facility dedicated to a specific application, in contrast with a shared resource such as the telephone network or the Internet. In practice, such services may not be provided by a single, discrete, end-to-end cable, but they do provide guarantees of constant bandwidth availability and near-constant latency, properties that cannot be guaranteed for more public systems.

Communication circuits

Telekura, an abbreviation for "telephone clubs", are telephone-based dating services originating in Japan. In the original incarnation of the telephone club, popular in the mid-1990s, a male client would pay a fee to enter a booth with a phone. The phone would then ring with calls from women or girls willing to go on a date — the implicit understanding being that this would lead to paid sex. These clubs have been outlawed as fronts for prostitution in some jurisdictions in Japan.

Japanese sex terms Communications in Japan Prostitution in Japan Japanese words and phrases Sexuality in Japan
Phone fraud

Whether in the form of the consumer attempting to defraud the telephone company, the telephone company attempting to defraud the consumer, or a third party attempting to defraud either of them, fraud has been a part of the telephone system almost from the beginning. A carrier's bottom line is significantly impacted by billing fraud. Communications Fraud Communications fraud is the use of telecommunications products or services with no intention of payment.

Telephony Fraud
UE (wireless telephone)

Pioneers, a Volunteer Network

Pioneers, a Volunteer Network, also known as the Telephone Pioneers of America, or simply as the Telephone Pioneers, is a non-profit charitable organization based in Denver, Colorado, U.S.A. It was founded in Boston in 1911 as the Telephone Pioneers of America, with 734 members, including Alexander Graham Bell who received membership card No. 1.

Organizations based in Denver, Colorado Alexander Graham Bell Charities based in the United States
Telephone numbers in Puerto Rico

Telephone numbers in Puerto Rico are assigned under the North American Numbering Plan (NANP). Prior to March 1, 1996, Puerto Rico was one of many Caribbean islands served by area code 809. On that date Puerto Rico was assigned the new area code 787 (with the mnemonic PUR or PTR). As elsewhere in the NANP region, increasing use of modems and mobile telephones strained the supply of seven-digit numbers within area 787, and an overlay plan came into effect in or about September 2001.

Area codes in the Caribbean Telecommunications in Puerto Rico Communications in Puerto Rico Puerto Rico-related lists Telephone numbers by country Telephone numbers in Puerto Rico
South Central Bell

South Central Bell Telephone Company, headquartered in Birmingham, Alabama, was the name of the Bell System's operations in Alabama, Kentucky, Louisiana, Mississippi, and Tennessee. South Central Bell was created in July 1968 when the Bell telephone operations in those states were split off from Southern Bell, similar to how Pacific Northwest Bell split off from Pacific Telephone & Telegraph around the same time period.

Defunct companies based in Alabama 1992 disestablishments Companies established in 1968 Telecommunications companies of the United States Companies based in Birmingham, Alabama
TMP Worldwide Advertising and Communications

TMP Worldwide Advertising & Communications, LLC is an independent recruitment advertising agency Headquartered in New York City. TMP has offices throughout North America, Europe and Asia, and network partners on offices around the world. TMP is focused on providing organizations communications strategies for their employment offerings. TMP was formerly a division of Monster Worldwide, becoming an independent company in 2006.

Advertising agencies of the United States Companies established in 1967 Companies based in New York City
Single Non-Emergency Number

In law enforcement and telecommunications, Single Non-Emergency Number or SNEN is a phone service run by police forces and local councils in England and Wales and is used for the public to contact police forces in the UK. Some forces currently have a different telephone number, the SNEN project proposes to make 101 the same number for all English and Welsh police forces, in a system similar to 112 and 999.

Law enforcement in the United Kingdom
Area code 670

The area code 670 is the local telephone area code for the U.S. Commonwealth of the Northern Mariana Islands (CNMI). It was created on July 1, 1997 and replaced the previous International Telecommunication Union country code 670, which is now used by East Timor.

Area codes in the United States Communications in the Northern Mariana Islands
Telephone Company Building

Wisconsin Bell

Wisconsin Bell, Inc. (known as Wisconsin Telephone Co. before 1984) is the name of the Bell Operating Company serving Wisconsin. It is owned by AT&T through AT&T Teleholdings, originally known as Ameritech. Their headquarters is at 722 North Broadway, Milwaukee, WI. After the 1984 Bell System Divestiture, Wisconsin Bell became a part of Ameritech, one of the 7 original Bell Regional Holding Companies.

Companies established in 1882 AT&T Bell System Communications in Wisconsin Telecommunications companies of the United States Companies based in Milwaukee, Wisconsin
Telephone and Data Systems

Telephone and Data Systems, Inc. is a Chicago-based telecommunications service company providing wireless, telephone and broadband services to more than 7 million customers in 36 states through its business units TDS Telecom and U.S. Cellular, the sixth-largest wireless service provider in the U.S. It also has ownership in Suttle-Straus, a printing company.

Companies established in 1969 Companies based in Chicago, Illinois Telephony
Telephone numbers in China

The Chinese Telephone Code Plan is the way to group telephone numbers of Mainland China. Land lines and mobile phones follow different systems: land lines use area codes, while mobile phones do not. For land line area codes, a "0" is typically added in front when dialing domestic long distance, but is never added when dialing from outside mainland China. Domestic phone numbers in large cities have 8 digits, and in other areas no less than 7.

China-related lists Telephone numbers by country

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