User's Guide

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 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-
Revert
The user talks on the channel
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
Glossary
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English