Talk:Communication Networks/History of Networking

Networks existed before wireless EM. According to the telegraphy article the first optical semaphore line was built in 1792. Commercial electrical telegraphy began in the 1830s. Wired networks were central to communication through the 1900s and remain important. Also there is optical fiber and microwave. Media other than cellular should be discussed. Regards,  ... PeterEasthope (discuss • contribs) 15:22, 3 February 2018 (UTC)