Two-way Radio

A two-way radio is a radio that can both transmit and receive (a transceiver), unlike a broadcast receiver which only receives content. A two-way radio (transceiver) allows the operator to have a conversation with other similar radios operating on the same radio frequency (channel). Two-way radios are available in mobile, stationary base and hand-held portable configurations. Hand-held radios are often called walkie-talkies or handie-talkies.

Two-way radio systems usually operate in a half-duplex mode; that is, the operator can talk, or he can listen, but not at the same time. A push-to-talk or Press To Transmit button activates the transmitter; when it is released the receiver is active. A mobile phone or cellular telephone is an example of a two-way radio that both transmits and receives at the same time (called full-duplex mode). It uses two different radio frequencies (channels) to carry the two directions of the conversation simultaneously.

Read more about Two-way Radio:  History, Two-way Radio Frequencies, UHF Versus VHF, Range, Other Two-way Radio Devices

Other articles related to "radio, radios":

Louisville Metro EMS - Radio Codes - Two-way Radio
... The current Louisville Metro public safety radio system is a Motorola Project 25-compliant trunking system ... including all those used by LMEMS, thus radio traffic cannot be received using a scanner ... serviced hospital can receive report from the crews in the field via radio when necessary ...
Other Two-way Radio Devices
... Not all two way radios are hand-held devices ... The same technology that is used in two way radios can be placed in other radio forms ... that can be placed around a business that a customer can use to summon help from a two way radio equipped store employee ...

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