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Glossary
Preprogrammed
Private
(Conversation) Call
Private Line (PL)
Programmable
PTT
Radio Frequency
(RF)
Repeater
Selective Call
Selective Switch
Squelch
Standby
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Refers to a software feature that has been
activated by a qualified radio technician.
A feature that lets you have a private
conversation with another radio user in the
group.
A sub-audible tone that is transmitted such
that only receivers decoding the tone will
receive it.
Refers to a radio control that can have a
radio feature assigned to it.
Push-To-Talk — the PTT button engages
the transmitter and puts the radio in transmit
(send) operation when pressed.
The part of the general frequency spectrum
between the audio and infrared light regions
(about 10 kHz to 10,000,000 MHz).
A conventional radio feature, where you talk
through a receive/transmit facility that re-
transmits received signals, in order to
improve communications range and
coverage.
A feature that allows you to call a select
individual, intended to provide privacy and
to eliminate the annoyance of having to
listen to conversations of no interest to you.
Any digital P25 traffic having the correct
Network Access Code and the correct
talkgroup.
Special electronic circuitry, added to the
receiver of a radio, that reduces, or cuts off,
unwanted signals before they are heard in
the speaker.
An operating condition whereby the radio's
speaker is muted but still continues to
receive data.
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