[TrunkCom] EDACS 101

[David L. Wilson]

Correct post is below (there were several typos in one line)


> One of the things you need to know about EDACS is that instead of 
> talkgroups, you have AFS (which stands for Agency Fleet Subfleet).  For 
> example, 02-031 would be Agency 02, Fleet 03 and Subfleet 1.  Note that 
> would bet the equivalent of a single Motorola talkgroup if it were a 
> Motorola trunk system.
>
> A factor that complicates matter is that the above ( and all scanner 
> makers and hobby lists) assumes the agency uses 4 bits (00 to 15 in 
> decimal), the fleet uses 4 bits (again 00 to 15) and the Subfleet uses 3 
> bits (0 to 7). You will soon note that the AFS numbers do not seem to line 
> up quite right. That is because the scanner makers got it wrong (and the 
> lists have to be wrong in the same way to program the radio).  Almost all 
> systems hav an AFS that uses 3 bits (not 4) for the Agency, 4 for the 
> Fleet (as before)  and 4 for the Subfleet (not 3).  So the AFS 02-031 
> (Agency 02 Fleet 03 Subfleet 1) is actually AFS is actually AFS 1-0109 
> (Agency 1 Fleet 01 Subfleet 9).  If you take one of the published lists 
> and do all the changes (the Monitoring Times website has a program to help 
> convert--I wrote it), the system will make better sense.  But you will 
> need to use the wrong numbers most of the time as the scanner makers got 
> it wrong and thus all the published list are wrong in the same way.
>
>