Motorola MT 1500 - Manual (Page 69)

MT 1500 Model 1.5 57
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 A page received by your radio, along with 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.)
MT1500 1.5 UG.book Page 57 Thursday, May 8, 2008 11:17 AM