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The Telephones Portal

A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from Greek: τῆλε (tēle, far) and φωνή (phōnē, voice), together meaning distant voice. A common short form of the term is phone, which came into use early in the telephone's history.

In 1876, Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice at a second device. This instrument was further developed by many others, and became rapidly indispensable in business, government, and in households. (Full article...)

A mobile phone (or cellphone) is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone (landline phone). The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are called cellphones (or "cell phones") in North America. In addition to telephony, digital mobile phones support a variety of other services, such as text messaging, multimedia messaging, email, Internet access (via LTE, 5G NR or Wi-Fi), short-range wireless communications (infrared, Bluetooth), satellite access (navigation, messaging connectivity), business applications, payments (via NFC), multimedia playback and streaming (radio, television), digital photography, and video games. Mobile phones offering only basic capabilities are known as feature phones (slang: "dumbphones"); mobile phones that offer greatly advanced computing capabilities are referred to as smartphones. (Full article...)

A smartphone (often simply called a phone) is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities. It typically has a touchscreen interface, allowing users to access a wide range of applications and services, such as web browsing, email, and social media, as well as multimedia playback and streaming. Smartphones have built-in cameras, GPS navigation, and support for various communication methods, including voice calls, text messaging, and internet-based messaging apps. (Full article...)

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Bell Canada (commonly referred to as Bell) is a Canadian telecommunications company headquartered at 1 Carrefour Alexander-Graham-Bell in the borough of Verdun, Quebec, in Canada. It is an ILEC (incumbent local exchange carrier) in the provinces of Ontario and Quebec; as such, it was a founding member of the Stentor Alliance. It is also a CLEC (competitive local exchange carrier) for enterprise customers in the western provinces.

Its subsidiary Bell Aliant provides services in the Atlantic provinces. It provides mobile service through its Bell Mobility (including flanker brand Virgin Plus) subsidiary, and television through its Bell Satellite TV (direct broadcast satellite) and Bell Fibe TV (IPTV) subsidiaries.

Bell Canada's principal competitors are Rogers Communications in Ontario and Western Canada, Telus in Quebec and Western Canada, and Quebecor (Videotron) in Quebec. The company serves over 13 million phone lines and is headquartered at the Campus Bell complex in the borough of Verdun in Montreal.^{[irrelevant citation]} (Full article...)

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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 since at least 1944 for both routine and emergency communication on ships to allow communication between key locations on a vessel if power is unavailable. A sound-powered phone circuit can have two or more stations on the same circuit. The circuit is always live, thus a user begins speaking rather than dialing another station. Sound-powered telephones are not normally connected to a telephone exchange. (Full article...)

List of phone types
Payphone Courtesy telephone Emergency telephone Secure telephone Smartphone Mobile phone Satellite phone Phablet Car phone Windows Phone Camera phone Feature phone VoIP phone iPhone Tin can telephone Grillo telephone Golden telephone Reis telephone Cordless telephone Shoe phone Field telephone IBM Simon Mobile radio telephone Foldable smartphone Modular smartphone Prepaid mobile phone

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Intercept tone played by The TeleZapper (plays 2 times)

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The TeleZapper is a device designed to reduce the number of telemarketing-related phone calls a household receives by imitating the tone signal normally played by a phone company to indicate a line has been disconnected. The Telezapper was created by Privacy Technologies, Inc, a wholly owned subsidiary of Royal Appliance Mfg. Co. (Full article...)

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The following are images from various telephone-related articles on Wikipedia.

Image 1
Bell prototype telephone stamp
Centennial Issue of 1976
(from History of the telephone)
Image 2The Motorola DynaTAC 8000X. In 1983, it became the first commercially available handheld cellular mobile phone. (from Mobile phone)
Image 3The LG Prada with a large capacitive touchscreen introduced in 2006 (from Smartphone)
Image 4A Meizu MX4 with Flyme OS (from Smartphone)
Image 5IBM Simon and charging base (1994) (from Smartphone)
Image 6A Moto G7 Power; its display uses a tall aspect ratio and includes a "notch". (from Smartphone)
Image 7Actor portraying Alexander Graham Bell in a 1932 silent film. Shows Bell's second telephone transmitter (microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia. (from History of the telephone)
Image 8Antonio Meucci's telephone. (from History of the telephone)
Image 9A user consulting a mapping app on a phone (from Smartphone)
Image 10Typical mobile phone mini-SIM card (from Mobile phone)
Image 11Thomas Edison invented the carbon microphone which produced a strong telephone signal. (from History of the telephone)
Image 12Personal Handy-phone System mobiles and modems, 1997–2003 (from Mobile phone)
Image 13Mobile payment system. (from Smartphone)
Image 14Several BlackBerry smartphones, which were highly popular in the mid-late 2000s (from Smartphone)
Image 15A Samsung Galaxy S20 Plus, featuring a "hole-punch" camera (from Smartphone)
Image 16Two decades of evolution of mobile phones, from a 1992 Motorola 8900X-2 to the 2014 iPhone 6 Plus (from Mobile phone)
Image 17This layout of the camera viewfinder was first introduced by Apple with iOS 7 in 2013. Towards the late 2010s, several other smartphone vendors have ditched their layouts and implemented variations of this layout. (from Smartphone)
Image 18A New York City driver holding two phones (from Smartphone)
Image 19Apple iPhone smartphone (from History of the telephone)
Image 20The back of a Huawei P30. It features three rear-facing camera lenses with Leica optics. (from Smartphone)
Image 21"Device options" menu of Samsung Mobile's TouchWiz user interface as of 2013, accessed by holding the power button for a second (from Smartphone)
Image 22A German rotary dial telephone, the W48 (from History of the telephone)
Image 23A smartphone displaying the homepage of the English Wikipedia (from Smartphone)
Image 24The Nokia 9110 Communicator, opened for access to keyboard (from Smartphone)
Image 25E-waste in Agbogbloshie (from Smartphone)
Image 26A 19th century acoustic tin can or "lovers' telephone" (from History of the telephone)
Image 27Private conversation, 1910 (from History of the telephone)
Image 28Tivadar Puskás proposed the telephone switchboard exchange in 1876. (from History of the telephone)
Image 29Android smartphones (from Mobile phone)
Image 30Tooltip in Kiwi Browser, a Google Chromium derivative, reveals the full URL by hovering over the tab list using the stylus on a Samsung Galaxy Note 4. (from Smartphone)
Image 31Inserted memory and SIM cards (from Smartphone)
Image 321917 wall telephone, open to show magneto and local battery (from History of the telephone)
Image 33Dupuis and Haug during a GSM meeting in Belgium, April 1992 (from Mobile phone)
Image 34Philipp Reis, 1861, constructed the first telephone, today called the Reis telephone. (from History of the telephone)
Image 35Scrapped mobile phones (from Mobile phone)
Image 36Top of cellular telephone tower (from History of the telephone)
Image 37A sign along Bellaire Boulevard in Southside Place, Texas (Greater Houston) states that using mobile phones while driving is prohibited from 7:30 am to 9:00 am and from 2:00 pm to 4:15 pm. (from Smartphone)
Image 38Antonio Meucci, 1854, constructed telephone-like devices. (from History of the telephone)
Image 39A high-capacity portable battery charger (power bank) (from Smartphone)
Image 40A French Gower telephone of 1912 at the Musée des Arts et Métiers in Paris (from History of the telephone)
Image 41Cellular networks work by only reusing radio frequencies (in this example frequencies f1-f4) in non adjacent cells to avoid interference (from Mobile phone)
Image 42Active mobile broadband subscriptions per 100 inhabitants (from Mobile phone)
Image 431896 Telephone (Sweden) (from History of the telephone)
Image 44The master telephone patent granted to Bell, 174465, March 10, 1876 (from History of the telephone)
Image 45The back of a Nokia 9 PureView. It features a five-lens camera array with Zeiss optics, using a mixture of color and monochrome sensors. (from Smartphone)
Image 46Mobile payment system (from Mobile phone)
Image 47A driver using two handheld mobile phones at once (from Mobile phone)
Image 48The HTC Desire, a 2010 smartphone with optical trackpad and search button (from Smartphone)
Image 49Mobile/desktop convergence: the Librem 5 smartphone can be used as a basic desktop computer (from Smartphone)
Image 50Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. (from History of the telephone)
Image 51Old Receiver schematic, c.1906 (from History of the telephone)
Image 52Smartphone with infrared transmitter on top for use as remote control (from Smartphone)
Image 53People using phones while walking (from Mobile phone)
Image 54Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. (from History of the telephone)
Image 55Mobile phone subscribers per 100 inhabitants. 2014 figure is estimated. (from Mobile phone)
Image 56The original Apple iPhone; following its introduction the common smartphone form factor shifted to large touchscreen software interfaces without physical keypads (from Smartphone)
Image 57A sign in the US restricting cell phone use to certain times of day (no cell phone use between 7:30–9:00 am and 2:00–4:15 pm) (from Mobile phone)
Image 58A smartphone touchscreen (from Smartphone)
Image 59Martin Cooper of Motorola, shown here in a 2007 reenactment, made the first publicized handheld mobile phone call on a prototype DynaTAC model on 3 April 1973. (from Mobile phone)
Image 60Historical marker commemorating the first telephone central office in New York State (1878) (from History of the telephone)
Image 61Optical track pad sensor of an HTC Legend, 2010. (from Smartphone)
Image 62A text message (SMS) (from Mobile phone)

Selected biography

William Rae Young, Jr. (October 30, 1915 – March 7, 2008) was one of the Bell Labs engineers that invented the cell phone.

The history of cellular phone technology began on December 11, 1947 with a Bell Labs internal memo written by Douglas H. Ring describing the idea of Rae Young of the hexagonal cell concept for a cellular mobile telephone system. (Full article...)

List of selected biographies
Alexander Graham Bell Thomas Edison Innocenzo Manzetti Charles Bourseul Johann Philipp Reis Antonio Meucci Tivadar Puskás Douglas H. Ring Martin Cooper (inventor) Thomas Cowherd Gardiner Greene Hubbard Anthony Pollok Thomas A. Watson Elisha Gray George Sweigert Pat Fleet John Draper

Selected images

Image 1Push-button telephone
Image 2Foldable smartphones
Image 3Historical telephone with the German imperial eagle and the heraldic shield of the House of Hohenzollern dynasty; Vollmer's Mill, Seebach, Baden-Württemberg, Germany
Image 4Acoustic telephone ad, The Consolidated Telephone Co., Jersey City, New Jersey, 1886
Image 5Photograph of the interior of the Prairie Grove Airlight Outdoor Telephone Booth in Prairie Grove, Arkansas, which is listed on the National Register of Historic Places
Image 6Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French
Image 7A traditional North American rotary phone dial. The associative lettering was originally used for dialing named exchanges but was kept because it facilitated memorization of telephone numbers.
Image 8A cordless phone
Image 9Landline call blocking in use
Image 10A police box outside Earl's Court tube station in London, built in 1996 and based on the 1929 Gilbert Mackenzie Trench design
Image 11A Bell Canada payphone with digital display
Image 12Mailbox and public telephone in Haßfurt, Germany
Image 13A Funke + Huster telephone inside the Idrija Mine, Slovenia
Image 14A Northern Electric telephone, model number N415H, circa 1950 (probably)
Image 15An Italian gettone telefonico (telephone token) from 1945, which was used in Italian phone booths
Image 16Wooden wall telephone with a hand-cranked magneto generator
Image 17Public telephone, Bucharest, Romania
Image 18Apple iPhones
Image 19Android smartphones
Image 20Automatic electric Rotary dial telephone
Image 21The AUTOVON was a worldwide American military telephone system that was built starting in 1963.
Image 22A Western Electric candlestick phone from the 1920s
Image 23A historic telephone booth in Skansen, Stockholm
Image 24An example of a K6, the most common red telephone box model, photographed in London in 2012
Image 25Telephone booth box art outside the Tower of London, 2012
Image 26Track-side emergency brake and emergency telephones at the platform of the metro station Aspern Nord, Donaustadt, Vienna, Austria
Image 27Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French
Image 28Emergency telephones, on the Paris-Bordeaux railway line, Saint-Saviol station, Vienne, France

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Telephony
Types	Landline Cable telephony Mobile phone Satellite phone Photophone
Accessories	Answering machine Caller ID
Connectivity	Cable protection system Communications satellites Fibre-optical Free-space optical ISDN Mobile phone signal POTS PSTN Submarine cables VoIP
Calls	Missed call Misdialed call Nuisance call Phone tag
Applications	Fax transmission Telephone calls Telephone newspapers Théâtrophone Video calls
Telecommunication portal Telephones portal

Emergency telephone numbers
Emergency telephone Harmonised service of social value
000 (Australia) 102 (India) 106 (Australia) 108 (India) 110 (Iran, Japan, China) 111 (New Zealand) 112 (Europe and others, worldwide GSM mobile networks) 119 (parts of Asia and Jamaica) 120 (China) 122 (Austria, Egypt, and Bosnia and Herzegovina) 123 (Colombia, Egypt) 128 (Mercosur member states) 190 (Brazil) 911 (Iraq, North America E-911 system, Philippines) 988 (North America Suicide & Crisis Lifeline) 999 (Bangladesh, UK and others) 1122 (Pakistan)
Telephones portal Telecommunication portal List article Category Wikimedia Commons