Motorola XTSTM 1500 Glossary, Active Channel, Analog Signal, ASTRO 25 Trunking, Astro, Call Alert

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	Motorola standard for wireless analog or
Conventional	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.)

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