A radiotelephone is any device utilized to deliver voice transmissions over radio waves. Lots of devices fall under this definition. Many radiotelephones can relay messages through traditional land phone lines, although some are widely-used exclusively for mobile-to-mobile wireless transmissions. Many modern devices such as cellular phones are technically classified as radiotelephones.
The most basic sort of radiotelephone is a simple transceiver that sends voice signals to another station. The radios used by police cars are types of standard radiotelephones. Ships, aircraft, and military units also commonly use radiotelephones for communication, because they often work with situations where other voice transmission methods are certainly not available.
The technical definition of a radiotelephone extends beyond simple point-to-point transceivers, and also includes radios that could interface with all the land telephone system. Within this arrangement, a base receiver is associated with an average phone. Voice signals sent from a mobile radio are found with the base station and forwarded over the phone lines. A human operator enables you to connect calls, or perhaps an automated tone-controlled system may be used. Most of these radiotelephone installations were not unusual before mobile phones became prominent.
Cellular phones are in fact radiotelephones, even though they are hardly ever called with this name today. Each cell or area of phone coverage posesses a radio station that's for this traditional phone grid. A handheld cell phone unit contains a short range radio transceiver. Early cellphone radiotelephone conversations were sent via a standard radio signal and is found by any receiver for the proper frequency. Modern calls are encrypted in order to avoid eavesdropping.
Inspite of the rise in popularity of cellular phones, a lot of people still use simpler radiotelephones for professional and hobby communication. Businesses often employ mobile voice radios to dicuss in areas which can be outside cell coverage, like remote construction sites. Amateur radio experimenters use handheld and vehicle radiotelephones for connecting with other enthusiasts, and possess access to private radio repeaters that are similar to the mainstream cellphone networks.
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