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  2. Walkie-talkie - Wikipedia

    en.wikipedia.org/wiki/Walkie-talkie

    A walkie-talkie, more formally known as a handheld transceiver, HT, or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings , radio engineer Alfred J. Gross , Henryk Magnuski and engineering teams at Motorola .

  3. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

  4. Push-to-talk - Wikipedia

    en.wikipedia.org/wiki/Push-to-talk

    Push-to-talk over cellular (PTToC) is a service option for a cellular phone network that enables subscribers to use their phones as walkie-talkies with unlimited range. A typical push-to-talk connection connects almost instantly.

  5. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    An example of a half-duplex system is a two-party system such as a walkie-talkie, wherein one must say "over" or another previously designated keyword to indicate the end of transmission, to ensure that only one party transmits at a time. A good analogy for a half-duplex system would be a one-lane road that allows two-way traffic, traffic can ...

  6. General Mobile Radio Service - Wikipedia

    en.wikipedia.org/wiki/General_Mobile_Radio_Service

    GMRS radios are typically handheld portable (walkie-talkies) much like Family Radio Service (FRS) radios, and they share a frequency band with FRS near 462 and 467 MHz. Mobile and base station-style radios are available as well, but these are normally commercial UHF radios as often used in the public service and commercial land mobile bands ...

  7. Family Radio Service - Wikipedia

    en.wikipedia.org/wiki/Family_Radio_Service

    Motorola T5320 FRS handheld radio. The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band.

  8. ‘The Crossing’ by Huffington Post

    testkitchen.huffingtonpost.com/thecrossing

    Watch firsthand, in 360 video, as Susan Sarandon listens and learns about refugees' hopes, dreams and journeys

  9. Transceiver - Wikipedia

    en.wikipedia.org/wiki/Transceiver

    In radio communication, a transceiver is an electronic device which is a combination of a radio transmitter and a receiver, hence the name.It can both transmit and receive radio waves using an antenna, for communication purposes.