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TRUNKED OPERATION (EDACS OR GE-MARC)
Trunked operation refers to the use of a set of radio frequency channels
by multiple user groups. Users may place and receive calls to single or multiple
users without being monitored by other users (or group) on the system.
CONVENTIONAL OPERATION
All radios on a conventional system operate in one of two modes: repeated
or talk-around. Talk-around (also referred to as "direct mode") provides a direct
radio-to-radio short-range communications link. It is intended to maintain
communications outside of the main system coverage area. Trunked features
(such as call queueing and system scan) are not available in conventional mode.
DEFINITION OF TERMS
System
Group Or
Subfleet
Fleet
Agency
Individual Call
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OPERATING NOMENCLATURE
The term system refers to the particular group of
station repeaters and set of group/special calls pro-
viding service to the radio. Radios can be prepro-
grammed to work in different systems by changing
the systems selection or through wide area roam-
ing.
A group of users share the same preprogram-med
group identification number in their radios. All
radios in the same group receive dispatch calls
placed by any one radio in the group.
A fleet of users consists of multiple groups (sub-
fleets). Radios can be preprogrammed to make
fleet calls to simultaneously access multiple user
groups.
An agency is composed of multiple fleets. Radios
can be pre-programmed to initiate agency calls to
access multiple fleets.
Every radio in the system has been assigned a
preprogrammed, unique individual identification
code. A radio can be programmed to individually
call another particular radio from the Special Call
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