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This chart shows how talkgroups are organized
within an EDACS system at the AGENCY level.
The individual talkgroups cannot be shown at this
scale because there are over 2000. However the
chart can show the 16 Agencies in this example.
The system is logical and easy to understand.
EDACS systems are typically arranged in an
The system users are given blocks of talkgroups.
Sizes vary but most large cities and other agencies
have blocks of 128 channels. Smaller cities have
only 64 or 32 channels.
In this example, the County Sheriff is agency 01.
The city of Sullivan is Agency 03. Adams Hill and
Matthew Junction share Agency 08.
Your scanner shows EDACS talkgroups in AFS
(Agency-Fleet-Subfleet) format. This helps you see,
at a glance, who you are monitoring. And with the
partial-entry feature you can easily include nearby,
related channels in the same Fleet or Agency. You
can just as easily exclude entire unwanted Fleets
When in Search mode, with the system frequencies
programmed, and your scanner locked to the control
channel, you can select a desired city by keying in
the AGENCY part of the AFS talkgroup. For
example, you can select the entire city of Sullivan
with 4 key presses zero, three, ,
When you hear an interesting talkgroup, capture it to
your scan list by pressing
E during the transmission.
Or HOLD on it by pressing the
If you want to monitor the Sullivan Police Dispatch
channel (which is talk group 03-062), press zero,
three, , zero, six, two,
Your scanner can also work in DECIMAL format.
This talkgroup in decimal format is 434. But decimal
format does not give you any information about the
system hierarchy. For example Sullivan, in decimal,
uses channels from 384 to 511. This is not as easy
to remember as Agency 03. But decimal is useful if
you need to work from decimal talkgroup lists.