The Telephones Portal
A telephone, colloquially referred to as a phone, 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 Ancient Greek: τῆλε, romanized: tēle, lit. 'far' and φωνή (phōnē, voice), together meaning distant voice.
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 cell phone 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...)
Selected article -
Problematic smartphone use is
psychological or behavioral dependence on
cell phones. It is closely related to other forms of digital media overuse such as
social media addiction or
internet addiction disorder.
Commonly known as "smartphone addiction", the term "problematic smartphone use" was proposed by researchers to describe similar behaviors presenting without evidence of addiction.
Problematic use can include preoccupation with mobile communication, excessive money or time spent on mobile phones, and use of mobile phones in socially or physically inappropriate situations, such as driving an automobile. Increased use can also lead to adverse effects on relationships, degraded mental or physical health, and increased anxiety when separated from a mobile phone or sufficient signal. Individuals between the ages of 3 and 11 are at the highest risk for problematic smartphone use. ( Full article...)Types of phones -
A feature phone (also spelled featurephone) is a type or class of mobile phone that retains the form factor of earlier generations of mobile telephones, typically with press-button based inputs and a small non-touch display. They tend to use an embedded operating system with a small and simple graphical user interface, unlike large and complex mobile operating systems such as Android from Google or iOS from Apple.
The functions of feature phones are limited compared to smartphones, which integrate the phone with an Internet communications device; following the rise of smartphones, the feature phone has sometimes been referred to by the retronym dumbphone. However, some feature phones can provide functions found in smartphones, including Internet capabilities, apps and mobile games. ( Full article...)Selected audio -
In telephony, a special information tone (SIT) is an in-band international standard call progress tone consisting of three rising tones indicating a call has failed. It usually precedes a recorded announcement describing the problem. ( Full article...)
List articles
- Comparison of smartphones
- List of best-selling mobile phones
- List of countries by number of broadband Internet subscriptions
- List of countries by number of telephone lines in use
- List of countries by smartphone penetration
- List of country calling codes
- List of iPhone models
- List of mobile network operators
- List of mobile phone brands by country
- List of mobile phone generations
- List of telecommunications companies
Related portals
General images -
-
A Samsung Galaxy S20 Plus, featuring a "hole-punch" camera (from Smartphone) -
This 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) -
The 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) -
The master telephone patent granted to Bell, 174465, March 10, 1876 (from History of the telephone) -
Inserted memory and SIM cards (from Smartphone) -
Typical mobile phone mini- SIM card (from Mobile phone) -
Old Receiver schematic, c.1906 (from History of the telephone) -
Mobile/desktop convergence: the Librem 5 smartphone can be used as a basic desktop computer (from Smartphone) -
Thomas Edison invented the carbon microphone which produced a strong telephone signal. (from History of the telephone) -
A user consulting a mapping app on a phone (from Smartphone) -
1896 Telephone ( Sweden) (from History of the telephone) -
Antonio Meucci's telephone. (from History of the telephone) -
-
Martin 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) -
Mobile payment system (from Mobile phone) -
A New York City driver holding two phones (from Smartphone) -
Antonio Meucci, 1854, constructed telephone-like devices. (from History of the telephone) -
Apple iPhone smartphone (from History of the telephone) -
-
The LG Prada with a large capacitive touchscreen introduced in 2006 (from Smartphone) -
Personal Handy-phone System mobiles and modems, 1997–2003 (from Mobile phone) -
-
The back of a Huawei P30. It features three rear-facing camera lenses with Leica optics. (from Smartphone) -
Tooltip 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) -
-
Historical marker commemorating the first telephone central office in New York State (1878) (from History of the telephone) -
A 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) -
Android smartphones (from Mobile phone) -
A Moto G7 Power; its display uses a tall aspect ratio and includes a "notch". (from Smartphone) -
The original Apple iPhone; following its introduction the common smartphone form factor shifted to large touchscreen software interfaces without physical keypads (from Smartphone) -
Philipp Reis, 1861, constructed the first telephone, today called the Reis telephone. (from History of the telephone) -
1917 wall telephone, open to show magneto and local battery (from History of the telephone) -
Dupuis and Haug during a GSM meeting in Belgium, April 1992 (from Mobile phone) -
Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus (from Mobile phone) -
Mobile phone subscribers per 100 inhabitants. 2014 figure is estimated. (from Mobile phone) -
Active mobile broadband subscriptions per 100 inhabitants (from Mobile phone) -
Mobile payment system. (from Smartphone) -
Several BlackBerry smartphones, which were highly popular in the mid-late 2000s (from Smartphone) -
People using phones while walking (from Mobile phone) -
A 19th century acoustic tin can or "lovers' telephone" (from History of the telephone) -
Actor 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) -
A smartphone touchscreen (from Smartphone) -
Top of cellular telephone tower (from History of the telephone) -
A 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)
-
-
Optical track pad sensor of an HTC Legend, 2010. (from Smartphone) -
Smartphone with infrared transmitter on top for use as remote control (from Smartphone) -
Private conversation, 1910 (from History of the telephone) -
Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. (from History of the telephone) -
A French Gower telephone of 1912 at the Musée des Arts et Métiers in Paris (from History of the telephone) -
"Device options" menu of Samsung Mobile's TouchWiz user interface as of 2013, accessed by holding the power button for a second (from Smartphone) -
Scrapped mobile phones (from Mobile phone) -
The Nokia 9110 Communicator, opened for access to keyboard (from Smartphone) -
Bell prototype telephone stamp(from History of the telephone)
Centennial Issue of 1976 -
Cellular networks work by only reusing radio frequencies (in this example frequencies f1-f4) in non adjacent cells to avoid interference (from Mobile phone) -
IBM Simon and charging base (1994) (from Smartphone) -
-
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. (from History of the telephone) -
A text message (SMS) (from Mobile phone) -
A smartphone displaying the homepage of the English Wikipedia (from Smartphone) -
The Motorola DynaTAC 8000X. In 1983, it became the first commercially available handheld cellular mobile phone. (from Mobile phone) -
A driver using two handheld mobile phones at once (from Mobile phone)
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.jpg)
.jpg)
.jpg)
.jpg)
.JPG)
Selected biography
Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois. Some recent authors have argued that Gray should be considered the true inventor of the telephone because Alexander Graham Bell allegedly stole the idea of the liquid transmitter from him. Although Gray had been using liquid transmitters in his telephone experiments for more than two years previously, Bell's telephone patent was upheld in numerous court decisions.
Gray is also considered to be the father of the modern music synthesizer, and was granted over 70 patents for his inventions. He was one of the founders of Graybar, purchasing a controlling interest in the company shortly after its inception. ( Full article...)List of selected biographies
|
|---|
Selected images
-
-
A police box outside Earl's Court tube station in London, built in 1996 and based on the 1929 Gilbert Mackenzie Trench design -
Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French -
A historic telephone booth in Skansen, Stockholm -
-
A Funke + Huster telephone inside the Idrija Mine, Slovenia -
Mailbox and public telephone in Haßfurt, Germany -
-
Photograph 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 -
A 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. -
Emergency telephones, on the Paris-Bordeaux railway line, Saint-Saviol station, Vienne, France -
-
Automatic electric Rotary dial telephone -
Track-side emergency brake and emergency telephones at the platform of the metro station Aspern Nord, Donaustadt, Vienna, Austria -
Apple iPhones -
Telephone booth box art outside the Tower of London, 2012 -
Wooden wall telephone with a hand-cranked magneto generator -
Public telephone, Bucharest, Romania -
The AUTOVON was a worldwide American military telephone system that was built starting in 1963. -
A Northern Electric telephone, model number N415H, circa 1950 (probably) -
Acoustic telephone ad, The Consolidated Telephone Co., Jersey City, New Jersey, 1886 -
An example of a K6, the most common red telephone box model, photographed in London in 2012 -
Android smartphones -
A Western Electric candlestick phone from the 1920s -
Historical telephone with the German imperial eagle and the heraldic shield of the House of Hohenzollern dynasty; Vollmer's Mill, Seebach, Baden-Württemberg, Germany -
Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French -
A Bell Canada payphone with digital display -
Landline call blocking in use
Topics
| Types | |
|---|---|
| Accessories | |
| Connectivity | |
| Calls | |
| Applications | |
|
Mobile networks, protocols |
| ||||||
|---|---|---|---|---|---|---|---|
| General operation | |||||||
|
Mobile devices |
| ||||||
| Mobile specific software |
| ||||||
| Culture | |||||||
| Environment and health | |||||||
| Law | |||||||
| |
Cellular network standards | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0G radio telephones (1946) | |||||||||
| 1G (1979) |
| ||||||||
| 2G (1991) |
| ||||||||
|
2G transitional (2.5G, 2.75G, 2.9G) |
| ||||||||
|
3G (1998) IMT-2000 (2001) |
| ||||||||
|
3G transitional (3.5G, 3.75G, 3.9G) |
| ||||||||
|
4G (2009) IMT Advanced (2013) |
| ||||||||
|
5G (2018) IMT-2020 (2021) |
| ||||||||
| Related articles | |||||||||
Subcategories
More
 |
Here are some tasks awaiting attention:
|
Telephones in the news
No recent news
Associated Wikimedia
The following Wikimedia Foundation sister projects provide more on this subject:
-
Commons
Free media repository -
Wikibooks
Free textbooks and manuals -
Wikidata
Free knowledge base -
Wikinews
Free-content news -
Wikiquote
Collection of quotations -
Wikisource
Free-content library -
Wikiversity
Free learning tools -
Wiktionary
Dictionary and thesaurus
The Telephones Portal
A telephone, colloquially referred to as a phone, 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 Ancient Greek: τῆλε, romanized: tēle, lit. 'far' and φωνή (phōnē, voice), together meaning distant voice.
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 cell phone 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...)
Selected article -
Problematic smartphone use is
psychological or behavioral dependence on
cell phones. It is closely related to other forms of digital media overuse such as
social media addiction or
internet addiction disorder.
Commonly known as "smartphone addiction", the term "problematic smartphone use" was proposed by researchers to describe similar behaviors presenting without evidence of addiction.
Problematic use can include preoccupation with mobile communication, excessive money or time spent on mobile phones, and use of mobile phones in socially or physically inappropriate situations, such as driving an automobile. Increased use can also lead to adverse effects on relationships, degraded mental or physical health, and increased anxiety when separated from a mobile phone or sufficient signal. Individuals between the ages of 3 and 11 are at the highest risk for problematic smartphone use. ( Full article...)Types of phones -
A feature phone (also spelled featurephone) is a type or class of mobile phone that retains the form factor of earlier generations of mobile telephones, typically with press-button based inputs and a small non-touch display. They tend to use an embedded operating system with a small and simple graphical user interface, unlike large and complex mobile operating systems such as Android from Google or iOS from Apple.
The functions of feature phones are limited compared to smartphones, which integrate the phone with an Internet communications device; following the rise of smartphones, the feature phone has sometimes been referred to by the retronym dumbphone. However, some feature phones can provide functions found in smartphones, including Internet capabilities, apps and mobile games. ( Full article...)Selected audio -
In telephony, a special information tone (SIT) is an in-band international standard call progress tone consisting of three rising tones indicating a call has failed. It usually precedes a recorded announcement describing the problem. ( Full article...)
List articles
- Comparison of smartphones
- List of best-selling mobile phones
- List of countries by number of broadband Internet subscriptions
- List of countries by number of telephone lines in use
- List of countries by smartphone penetration
- List of country calling codes
- List of iPhone models
- List of mobile network operators
- List of mobile phone brands by country
- List of mobile phone generations
- List of telecommunications companies
Related portals
General images -
-
A Samsung Galaxy S20 Plus, featuring a "hole-punch" camera (from Smartphone)
-
This 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)
-
The 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)
-
The master telephone patent granted to Bell, 174465, March 10, 1876 (from History of the telephone)
-
Inserted memory and SIM cards (from Smartphone)
-
Typical mobile phone mini- SIM card (from Mobile phone)
-
Old Receiver schematic, c.1906 (from History of the telephone)
-
Mobile/desktop convergence: the Librem 5 smartphone can be used as a basic desktop computer (from Smartphone)
-
Thomas Edison invented the carbon microphone which produced a strong telephone signal. (from History of the telephone)
-
A user consulting a mapping app on a phone (from Smartphone)
-
1896 Telephone ( Sweden) (from History of the telephone)
-
Antonio Meucci's telephone. (from History of the telephone)
-
-
Martin 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)
-
Mobile payment system (from Mobile phone)
-
A New York City driver holding two phones (from Smartphone)
-
Antonio Meucci, 1854, constructed telephone-like devices. (from History of the telephone)
-
Apple iPhone smartphone (from History of the telephone)
-
-
The LG Prada with a large capacitive touchscreen introduced in 2006 (from Smartphone)
-
Personal Handy-phone System mobiles and modems, 1997–2003 (from Mobile phone)
-
-
The back of a Huawei P30. It features three rear-facing camera lenses with Leica optics. (from Smartphone)
-
Tooltip 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)
-
-
Historical marker commemorating the first telephone central office in New York State (1878) (from History of the telephone)
-
A 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)
-
Android smartphones (from Mobile phone)
-
A Moto G7 Power; its display uses a tall aspect ratio and includes a "notch". (from Smartphone)
-
The original Apple iPhone; following its introduction the common smartphone form factor shifted to large touchscreen software interfaces without physical keypads (from Smartphone)
-
Philipp Reis, 1861, constructed the first telephone, today called the Reis telephone. (from History of the telephone)
-
1917 wall telephone, open to show magneto and local battery (from History of the telephone)
-
Dupuis and Haug during a GSM meeting in Belgium, April 1992 (from Mobile phone)
-
Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus (from Mobile phone)
-
Mobile phone subscribers per 100 inhabitants. 2014 figure is estimated. (from Mobile phone)
-
Active mobile broadband subscriptions per 100 inhabitants (from Mobile phone)
-
Mobile payment system. (from Smartphone)
-
Several BlackBerry smartphones, which were highly popular in the mid-late 2000s (from Smartphone)
-
People using phones while walking (from Mobile phone)
-
A 19th century acoustic tin can or "lovers' telephone" (from History of the telephone)
-
Actor 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)
-
A smartphone touchscreen (from Smartphone)
-
Top of cellular telephone tower (from History of the telephone)
-
A 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)
-
-
Optical track pad sensor of an HTC Legend, 2010. (from Smartphone)
-
Smartphone with infrared transmitter on top for use as remote control (from Smartphone)
-
Private conversation, 1910 (from History of the telephone)
-
Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. (from History of the telephone)
-
A French Gower telephone of 1912 at the Musée des Arts et Métiers in Paris (from History of the telephone)
-
"Device options" menu of Samsung Mobile's TouchWiz user interface as of 2013, accessed by holding the power button for a second (from Smartphone)
-
Scrapped mobile phones (from Mobile phone)
-
The Nokia 9110 Communicator, opened for access to keyboard (from Smartphone)
-
Bell prototype telephone stamp(from History of the telephone)
Centennial Issue of 1976 -
Cellular networks work by only reusing radio frequencies (in this example frequencies f1-f4) in non adjacent cells to avoid interference (from Mobile phone)
-
IBM Simon and charging base (1994) (from Smartphone)
-
-
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. (from History of the telephone)
-
A text message (SMS) (from Mobile phone)
-
A smartphone displaying the homepage of the English Wikipedia (from Smartphone)
-
The Motorola DynaTAC 8000X. In 1983, it became the first commercially available handheld cellular mobile phone. (from Mobile phone)
-
A driver using two handheld mobile phones at once (from Mobile phone)
Selected biography
Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois. Some recent authors have argued that Gray should be considered the true inventor of the telephone because Alexander Graham Bell allegedly stole the idea of the liquid transmitter from him. Although Gray had been using liquid transmitters in his telephone experiments for more than two years previously, Bell's telephone patent was upheld in numerous court decisions.
Gray is also considered to be the father of the modern music synthesizer, and was granted over 70 patents for his inventions. He was one of the founders of Graybar, purchasing a controlling interest in the company shortly after its inception. ( Full article...)List of selected biographies
|
|---|
Selected images
-
-
A police box outside Earl's Court tube station in London, built in 1996 and based on the 1929 Gilbert Mackenzie Trench design
-
Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French
-
A historic telephone booth in Skansen, Stockholm
-
-
A Funke + Huster telephone inside the Idrija Mine, Slovenia
-
Mailbox and public telephone in Haßfurt, Germany
-
-
Photograph 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
-
A 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.
-
Emergency telephones, on the Paris-Bordeaux railway line, Saint-Saviol station, Vienne, France
-
-
Automatic electric Rotary dial telephone
-
Track-side emergency brake and emergency telephones at the platform of the metro station Aspern Nord, Donaustadt, Vienna, Austria
-
Apple iPhones
-
Telephone booth box art outside the Tower of London, 2012
-
Wooden wall telephone with a hand-cranked magneto generator
-
Public telephone, Bucharest, Romania
-
The AUTOVON was a worldwide American military telephone system that was built starting in 1963.
-
A Northern Electric telephone, model number N415H, circa 1950 (probably)
-
Acoustic telephone ad, The Consolidated Telephone Co., Jersey City, New Jersey, 1886
-
An example of a K6, the most common red telephone box model, photographed in London in 2012
-
Android smartphones
-
A Western Electric candlestick phone from the 1920s
-
Historical telephone with the German imperial eagle and the heraldic shield of the House of Hohenzollern dynasty; Vollmer's Mill, Seebach, Baden-Württemberg, Germany
-
Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French
-
A Bell Canada payphone with digital display
-
Landline call blocking in use
Topics
| Types | |
|---|---|
| Accessories | |
| Connectivity | |
| Calls | |
| Applications | |
|
Mobile networks, protocols |
| ||||||
|---|---|---|---|---|---|---|---|
| General operation | |||||||
|
Mobile devices |
| ||||||
| Mobile specific software |
| ||||||
| Culture | |||||||
| Environment and health | |||||||
| Law | |||||||
| |
Cellular network standards | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0G radio telephones (1946) | |||||||||
| 1G (1979) |
| ||||||||
| 2G (1991) |
| ||||||||
|
2G transitional (2.5G, 2.75G, 2.9G) |
| ||||||||
|
3G (1998) IMT-2000 (2001) |
| ||||||||
|
3G transitional (3.5G, 3.75G, 3.9G) |
| ||||||||
|
4G (2009) IMT Advanced (2013) |
| ||||||||
|
5G (2018) IMT-2020 (2021) |
| ||||||||
| Related articles | |||||||||
Subcategories
More
|
|
Here are some tasks awaiting attention:
|
Telephones in the news
No recent news
Associated Wikimedia
The following Wikimedia Foundation sister projects provide more on this subject:
-
Commons
Free media repository -
Wikibooks
Free textbooks and manuals -
Wikidata
Free knowledge base -
Wikinews
Free-content news -
Wikiquote
Collection of quotations -
Wikisource
Free-content library -
Wikiversity
Free learning tools -
Wiktionary
Dictionary and thesaurus