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Learn about the history and features of the Trimline telephone, a series of telephones produced by Western Electric from 1965 to 1986. The Trimline was one of the first phones to use a rotary dial in the handset, a lighted dial, and a modular plug and jack.
Learn about the history and design of the handsets produced by Western Electric for the Bell System from 1927. The handsets combined the transmitter and receiver into a hand-held unit, and solved the technical problems of howling and sidetone.
Learn about the history and technology of push-button telephones, also known as touch-tone phones, that use dual-tone multi-frequency (DTMF) signaling. Find out how they replaced rotary dial phones and how they evolved into digital and cordless models.
AOL Mail offers secure and personalized email with features like AOL Mail, news, and weather for free. You can also access your email on the go with an iOS & Android app and get help from experts.
The model 500 telephone was the standard domestic desk phone in North America from 1950 to 1984. It had a modular design that allowed various features and colors, and was replaced by the model 2500 with touch-tone service.
Learn about the history and functions of telephone exchanges, also known as telephone switches or central offices, in the public switched telephone network or large enterprise telecommunications systems. Find out how they connect telephone subscriber lines or digital system virtual circuits, and how they evolved from manual to automatic switchboards.
During World War II, much of the company's efforts went towards wartime production, including building ships and aircraft parts. [7] [11] In 1954, Rheem brought the introduction of "glass-lining", which coated the interior of a water heater tank with porcelain to extend the life of the tank. [11]
Learn about the evolution of mobile phones from the first handheld device in 1973 to the smartphones of today. Compare different generations of mobile technology, from 0G to 5G, and their capabilities and services.
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