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Tag Archives: network
The Strange Story of Phone Phreaking
During the 1960’s, the use of analogue signalling tones between telephone exchanges gave rise to a new phenomenon called “Phone Phreaking”. The word “phreak” is apparently a combination of “phone”, “free” and “freak”, so it’s rather a good name. Phone … Continue reading
Posted in Telecom Ramblings
Tagged Cap'n Crunch, communications, Joe Engressia, network, phone, phreak, signalling, telecoms, telephone, telephone exchange
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Treating a Paranoid Computer
The ARPANET was an early computer network that played a critical role in the development of the Internet. In 1972, Robert Kahn organized the first public demonstration of the ARPANET’s capabilities at the International Conference on Computer Communications in Washington, … Continue reading
Posted in Telecom Ramblings
Tagged ARPANET, computer, Internet, network, packet switching
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Are Radio Waves Bad for Your Health?
The health risks associated with radioactivity have been recognized for many years. Alpha, beta and gamma emissions from radioactive sources can ionize atoms or molecules that they encounter by detaching electrons from them. People exposed to high levels of ionizing … Continue reading
Posted in Telecom Ramblings
Tagged cellular, communications, health risks, ionising radiation, microwave, mobile, network, radio, telecoms, WiFi
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Let’s Hear It for the Bad Boys of Physics!
Surprising as it may seem, there are still some major barriers that are holding back the march of telecommunications. One of these barriers is Einstein’s universal speed limit – the speed of light – which applies to electrical currents in … Continue reading
Posted in Telecom Ramblings
Tagged communications, fibre optic, microwave, network, neutrino, radio, speed of light, telecoms, transmission
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