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radio telephony

Radiotelephony is the transmission of speech by radio. The transmission is carried out by means of a handheld radio or a fixed station and can be carried out between two or more subscribers. Radiotelephony, also known as phony, can be regarded as a communication service that can be used in all network constellations and on all transmission frequencies released for this purpose; in cellular networks as well as in packet-switched or via direct radio links between the communication partners.

Voice radio is used wherever spoken information has to be transmitted. For example, in public safety radio, CB radio, private mobile radio, trunked radio, marine radio, aeronautical radio, railroad radio and amateur radio.

In voice radio, a distinction is made between different types of transmission between the communication partners. These are simplex, half- duplex and duplex. Simplex is a directional type of transmission in which data can only be transmitted in one direction, i.e. from the transmitting station to the receiving stations or handsets. In contrast, half-duplex allows both communication partners to use the transmission path one after the other. Only when one communication partner has spoken his information and the radio link is free again, the second communication partner can transmit his message to the first. This type of transmission is supported relatively frequently in voice radio. If both participants can hear and speak at the same time, as in telephony, then it is duplex.

In addition to the above-mentioned transmission types, there are also various traffic services such as scheduled traffic, star traffic, traffic circle traffic and cross traffic. If two communication partners talk to each other, it is line traffic. If the transmitting center sends a broadcast which all participants can receive and which can be answered by each individual participant only to the transmitting center, it is star traffic. With traffic circle traffic, everyone can hear everyone else. This is the traffic service that is used during operations. And cross traffic is when voice radio from other radio networks is received by the control center and fed into the existing voice radio network.

Informations:
Englisch: radio telephony
Updated at: 07.04.2011
#Words: 345
Links: transmission, speech, also known as (aka), communication (COM), service
Translations: DE
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