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A radiotelephone is any device which is used to send voice transmissions over radio waves. Numerous devices belong to this definition. Many radiotelephones can relay messages through traditional land phone lines, while some are widely-used exclusively for mobile-to-mobile wireless transmissions. A number of modern devices for example cellular phones are technically classified as radiotelephones.
The most basic type of radiotelephone is a straightforward transceiver that sends voice signals to an alternative station. The radios utilized by police cars are types of standard radiotelephones. Ships, aircraft, and military units also commonly use radiotelephones for communication, given that they often are employed in situations where other voice transmission methods usually are not available.
The technical definition of a radiotelephone extends beyond simple point-to-point transceivers, plus includes radios that can interface with the land phone system. On this arrangement, a base receiver is linked to a normal phone. Voice signals sent from the mobile radio are grabbed from the base station and forwarded with the phone lines. A person operator enables you to connect calls, or even an automated tone-controlled system may be used. These kinds of radiotelephone installations were fairly common before cell phones became prominent.
Cellular phones have been radiotelephones, although they are rarely called from this name today. Each “cell” or part of phone coverage contains a radio station that is linked to the traditional phone grid. A handheld cellular phone unit includes a short range radio transceiver. Early cellular phone radiotelephone conversations were sent with a standard radio signal and could be picked up by any receiver for the proper frequency. Modern calls are encrypted to avoid eavesdropping.
Regardless of the interest in cellular phones, many individuals still use more standard radiotelephones for professional and hobby communication. Businesses often employ mobile voice radios to dicuss in areas that are away from cell coverage, including remote construction sites. Amateur radio experimenters use handheld and vehicle radiotelephones to get in touch to enthusiasts, and possess use of private radio repeaters that are just like the mainstream mobile phone networks.
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