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MARAN KUMAR
Jul 22, 2023, 2:13 PM
Telecommunication is most important in all over the world. Telecommunication is a lot of generations like a 1G,2G,3G,4G,5G.Smoke signals and drums were first used for communication in portions of Asia, Africa, and the Americas. The first fixed semaphore systems appeared in Europe in the 1790s, but electrical telecommunication systems did not start to develop until the 1830s.
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