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Telephony ( / təˈlɛfəni / tə-LEF-ə-nee) is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone .
Voice over Internet Protocol ( VoIP ), [ a ] also called IP telephony, is a method and group of technologies for voice calls for the delivery of voice communication sessions over Internet Protocol (IP) networks, [ 2 ] such as the Internet. The broader terms Internet telephony, broadband telephony, and broadband phone service specifically refer ...
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. Tivadar Puskás proposed the telephone switchboard exchange in 1876. Thomas Edison invented the carbon microphone which produced a strong telephone ...
An old rotary dialtelephoneAT&Tpush button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunicationsdevice that permits two or more users to conduct a conversationwhen they are too far apart to be easily heard directly. A telephone converts sound, typically and most ...
By mid-century, mobile radio telephone service became available to free users from fixed locations in some cities. The arrival of the smartphone in the early 21st century provided every user a small mobile computer with microphone and speaker, that was bundled with powerful features, such as cameras and Internet access by operation of apps. It ...
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