Portal:Telephones
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 -
Snapdragon is a suite of system-on-a-chip (SoC) semiconductor products for mobile devices designed and marketed by Qualcomm Technologies Inc. The Snapdragon's central processing unit (CPU) uses the ARM architecture. As such, Qualcomm often refers to the Snapdragon as a "mobile platform". Snapdragon semiconductors are embedded in devices of various systems, including vehicles, Android, Windows Phone and netbooks. In addition to the processors, the Snapdragon line includes modems, Wi-Fi chips and mobile charging products.
The Snapdragon QSD8250 was released in December 2007. It included the first 1 GHz processor for mobile phones. Qualcomm introduced its "Krait" microarchitecture in the second generation of Snapdragon SoCs in 2011, allowing each processor core to adjust its speed based on the device's needs. At the 2013 Consumer Electronics Show, Qualcomm introduced the first of the Snapdragon 800 series and renamed prior models as the 200, 400 and 600 series. Several new iterations have been introduced since, such as the Snapdragon 805, 810, 615 and 410. Qualcomm re-branded its modem products under the Snapdragon name in February 2015. As of 2018,[update] Asus, HP and Lenovo have begun selling laptops with Snapdragon-based CPUs running Windows 10 under the name "Always Connected PCs", marking an entry into the PC market for Qualcomm and the ARM architecture. (Full article...)Types of phones -
Selected audio -
2600 hertz (2600 Hz) is a frequency in hertz (cycles per second) that was used in telecommunication signaling in mid-20th century long-distance telephone networks using carrier systems. (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 -
Selected biography
Pat Trumble Fleet is an American voice actress. Widely recognized for the tens of thousands of recordings she has made for US telephone companies such as AT&T, Verizon, Qwest, the former Bell System companies, and others since 1981, she is still most recognized as the person who says "AT&T" in the company's sound trademark, which played prior to any operator assisted or credit card paid call, and on answer when calling AT&T customer service numbers.
She is also the voice for most "star" services (e.g. last-call return, call blocking, etc.) for AT&T local telephone companies, and the voice heard when making AT&T handled calls through 1-800-CALL-ATT (225-5288) and through international AT&T access numbers such as USADirect. (Full article...)Selected images
Topics
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