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order to improve
communications range and
coverage.
Selective Call
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.
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,
unwanted signals before they
are heard in the speaker.
SSI
Synchronous Serial Interface
Standby
An operating condition whereby
the radio's speaker is muted
but still continues to receive
data.
Status Calls
Pre-defined text messages that
allow the user to send a
conditional message without
talking.
Tactical/ Non-
The user talks on the channel
Revert
that was selected before the
radio entered the emergency
state.
Talkaround
Bypass a repeater and talk
directly to another unit for easy
local unit-to-unit
communications.
Talkgroup
An organization or group of
radio users who communicate
with each other using the same
communication path.
TMS
Text Messaging Service
Trunking
The automatic sharing of
communications paths between
a large number of users (see
Conventional).
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English
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