Thursday, April 14, 2011

Two-way radio

A two-way radio is a radio that can both send out and receive (a transceiver), different a broadcast receiver which only receives content.
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Two-way radios are obtainable in mobile, stationary base and hand-held portable configurations. Hand-held radios are frequently called walkie-talkies or handie-talkies. A push-to-talk or Press To Transmit button is frequently present to turn on the transmitter.

A mobile phone or cellular telephone is an instance of a two-way radio that both transmits and receives at the same time (or full-duplex). It uses two different radio frequencies to carry the two directions of the discussion simultaneously.

Types

There is an collection of two-way radio technologies, systems, and types. There are families of radio types and each family has conflicting sub-groups and specific radio models. Some of these types are scheduled below.

Conventional versus trunked,
Trunked,
Simplex versus duplex channels

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