Glossary-1
Glossary of Terms and Acronyms Glossary
This glossary contains an alphabetical listing of terms and their definitions that are applicable to
portable and mobile subscriber radio products. All terms do not necessarily apply to all radios, and
some terms are merely generic in nature.
Term Definition
AGC Automatic Gain Control
Alert tone Audio signal produced by the station, providing feedback to the user.
Analog Refers to a continuously variable signal or a circuit or device designed to
handle such signals.
ASIC Application Specific Integrated Circuit
AUX Auxiliary
Band Frequencies allowed for a specific purpose.
CCI Control Channel Indicate
CDCSS Continuous Digital-Controlled Squelch Systems (DPL)
CTCSS Continuous Tone-Controlled Squelch Systems (PL)
CIT Central Interconnect Terminal. Used to provide telephone interconnect
capability in a trunked station.
CIU Console Interface Unit. Interface between operator console and station to
provide encryption/decryption functions.
Clear Channel modulation type in which voice information is transmitted over the
channel using analog modulation.
Code detect Traditional term used to indicate that a 12kbps CVSD signal is being received
on the RF channel.
Conventional Term used for standard non-trunked radio system (usually using TRC/DC
console).
CPI Console Priority Interface - option allowing console control of a trunked station.
CPS Customer Programming Software: Software with a graphical user interface
containing the feature set of a radio.
DDM Dual Device Module
Default A pre-defined set of parameters.
Digital Refers to data that is stored or transmitted as a sequence of discrete symbols
from a finite set; most commonly this means binary data represented using
electronic or electromagnetic signals.
DPL Digital Private Line (See PL)
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