is sent out on this same
channel.
OCW
Operation Critical Wireless
OTAR
Over-the-air rekeying.
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A one-way alert, with audio
and/or display messages.
Personality
A set of unique features
specific to a radio.
Preprogrammed
Refers to a software feature
that has been activated by a
qualified radio technician.
Private
(Conversation)
Call
A feature that lets you have a
private conversation with
another radio user in the
talkgroup.
Private Line (PL)
A sub-audible tone that is
transmitted such that only
receivers decoding the tone
receives it.
Programmable
Refers to a radio control that
can have a radio feature
assigned to it.
PTT
Push-To-Talk. The PTT button
engages the transmitter and
puts the radio in transmit
(send) operation when
pressed.
Radio Frequency
(RF)
The part of the general
frequency spectrum between
the audio and infrared light
regions (about 10 kHz to
10,000,000 MHz).
Repeater
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.
Selective Switch
Any digital P25 traffic having
the correct Network Access
Code and the correct talkgroup.
Squelch
Special electronic circuitry,
added to the receiver of a
radio, that reduces, or cuts off,
Glossary
101
English