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Huawei calls on US to lift export restrictions

The chairman of Huawei said Friday the Chinese tech giant has yet to see any benefit from President Donald Trump's promise to allow U.S. companies to sell some components to the company and called on Washington to remove ...

New app aims to automate drones for good

Researchers at Cranfield University have developed a smartphone app which can connect with off-the-shelf drones and send them to autonomously inspect multiple locations using coordinates received by SMS text message.

Code in Chinese surveillance app analysed

Computer security researchers at Ruhr-Universität Bochum (RUB), in collaboration with the association of investigative journalists from NDR and Süddeutsche Zeitung (SZ), have analysed the Chinese surveillance app that travellers ...

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Telephone

The telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.

The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.

This text uses material from Wikipedia, licensed under CC BY-SA