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SmarTrunk Systems, Inc.
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SECTION
Things You Always Wanted to Know
About Trunking…
Introduction
This section is directed to the system owner who is considering
converting conventional 450 MHz repeaters to trunked operation.
Perhaps you are an operator of shared community repeaters who would
like to achieve higher customer loading (and greater profits) from your
existing system. Or perhaps you operate a private “campus” system of
two or more VHF or UHF conventional channels used for plant security
or maintenance. Either way, converting your conventional channels to
trunked operation will significantly increase your system capacity while
providing privacy, system security, and advanced features such as
selective and emergency calling.
What is Trunking?
The term “trunking” originated decades ago in the telephone industry to
describe the process of selecting one clear communications path from
many possibilities. It is based on the premise that if 100 users are
sharing a certain communications network, only 10 users will actually
use the network at any one time. Therefore, it is not necessary to install
100 trunk lines to serve 100 telephone customers; only 10 lines will be
sufficient to provide a high level of service.
Trunking in Land Mobile Radio (LMR) Systems
Trunked LMR systems were introduced in the early 1980’s on the same
premise. By “trunking” together groups of frequencies (channels), a
communications network could serve a large number of users with a
very high level of service.
The efficiencies and features of trunked radio are well known to
experienced 800 MHz system operators.
“The Trunking Advantage”
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Efficiency
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Privacy
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Selective Calling
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