ASTRO XTS 2500/XTS 2500I Model III 124
Glossary
This is a list of specialized terms used in this manual.
ACK Acknowledgment of communication.
Active Channel A channel that has traffic on it.
Analog Signal An RF signal that has a continuous nature
rather than a pulsed or discrete nature.
ASTRO 25 Trunking Motorola standard for wireless digital trunked
communications.
ASTRO
Conventional
Motorola standard for wireless analog or
digital conventional communications.
Call Alert Privately page an individual by sending an
audible tone.
Carrier Squelch Feature that responds to the presence of an
RF carrier by opening or unmuting (turning
on) a receiver's audio circuit. A squelch circuit
silences the radio when no signal is being
received so that the user does not have to
listen to noise.
Central Controller A software controlled, computer-driven device
that receives and generates data for the
trunked radios assigned to it. It monitors and
directs the operations of the trunked
repeaters.
Channel A group of characteristics such as transmit/
receive frequency pairs, radio parameters,
and encryption encoding.
Control Channel In a trunking system, one of the channels that
is used to provide a continuous, two-way/data
communications path between the central
controller and all radios on the system.
Conventional Typically refers to radio-to-radio
communications, sometimes through a
repeater. (See Trunking.)
94C06.book Page 124 Wednesday, June 23, 2010 11:41 AM
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