Telephone - online puzzles

Telephone

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.

The essential elements of a telephone are a microphone (transmitter) to speak into and an earphone (receiver) which reproduces the voice at a distant location. The receiver and transmitter are usually built into a handset which is held up to the ear and mouth during conversation. The transmitter converts the sound waves to electrical signals which are sent through the telecommunication system to the receiving telephone, which converts the signals into audible sound in the receiver or sometimes a loudspeaker. Telephones permit transmission in both directions simultaneously.

Most telephones also contain an alerting feature, such as a ringer or a visual indicator, to announce an incoming telephone call. Telephone calls are initiated most commonly with a keypad or dial, affixed to the telephone, to enter a telephone number, which is the address of the call recipient's telephone in the telecommunication system, but other methods existed in the early history of the telephone.

The first telephones were directly connected to each other from one customer's office or residence to another customer's location. Being impractical beyond just a few customers, these systems were quickly replaced by manually operated centrally located switchboards. These exchanges were soon connected together, eventually forming an automated, worldwide public switched telephone network. For greater mobility, various radio systems were developed for transmission between mobile stations on ships and automobiles in the mid-20th century. Hand-held mobile phones were introduced for personal service starting in 1973. In later decades, their analog cellular system evolved into digital networks with greater capability and lower cost.

Convergence in communication services has provided a broad spectrum of capabilities in cell phones, including mobile computing, giving rise to the smartphone, the dominant type of telephone in the world today.

Sunflower online puzzleBe Kind online puzzleSaint Joseph puzzle online from photoAlicia Keys online puzzledbcfjhsdbcffjhsdbcjsd online puzzlePuzzle sweater puzzle online from photoMania Skłodowska puzzle online from photoKing Joas. puzzle online from photoindian on art puzzle online from photoibong adarna puzzle online from photojaa mamamonik puzzle online from photoBefore sunrise puzzle online from photohappy valentime day ;) online puzzleCan you guess who is this? online puzzlefoundation day online puzzleqe5ryrw6urwu6wyweywjwtyt online puzzlephone fax home puzzle online from photoIllusionist online puzzledisney rebel online puzzleJigsaw puzzles puzzle online from photoFun Knighton # 2 puzzle online from photoStop puzzle online from photoBellatrix puzzle online puzzleThe Testral Prefect Competition puzzle online from photo
Chinese New Year puzzle online from photoWe are bo puzzle online from photoSan Agustin puzzle online from photoGustav Klimt, Judith I online puzzlefeet puzzle puzzle online from photoBeary Nice puzzle online from photoMissqu0tb - teddy: P puzzle online from photomuzykoterapia puzzle online from photoNOX fun online puzzleHermione online puzzleChurch of the Holy Savior in Chora online puzzleBible Puzzle for Public Talk online puzzlehuong xinh dep puzzle online from photoRapanzle puzzle online from photoFerragnez online puzzleGriffin Yao online puzzleA woman at the computer online puzzleBen 10 Alien Force Alien Swarm online puzzlepuzz1hazl online puzzleFootballZ online puzzleFlowery Blueness puzzle online from photoElizabett III online puzzleWINSFORD online puzzleRosetta Stone online puzzle
Copyright 2024 www.epuzzle.info All rights reserved.