Greater Austin/Travis Regional Radio System (GATRRS) Question

[krdaniel55]

I hope this is the right place to post. I live in Austin, TX and they have GATRRS. My question is, when I am programming the counties that also use that system, do I have to add it for each county or is it ok just to do it in the main area that has it established? Not sure if it would cause a problem if I list for each county, just curious.

 

[Ensnared]

You should really read the following to answer your question. Austin, depending on your radio and/or pager, is a rather challenging listen. It depends on many variables. I would try to find a local to help you out.

Reportedly, the P25 trunking system uses two main layers: http://wiki.radioreference.com/inde...ional_Radio_System_(GATRRS)_Technical_Details

 

[willdanl]

Not sure what you mean by ‘main area’ but in general you should set up the different counties as different ‘systems’. Austin and Travis county public safety are carried on simulcast 1. But, for example you will hear Blanco county talk groups on one of the sites out there - Round Mountain, Blanco etc. You will hear Bastrop on the Bastrop simulcast site. It also depends on which radio you’re wanting to set up and how it handles different sites within the larger system. Hope this helps.

 

[Project25_MASTR]

Not sure what you mean by ‘main area’ but in general you should set up the different counties as different ‘systems’. Austin and Travis county public safety are carried on simulcast 1. But, for example you will hear Blanco county talk groups on one of the sites out there - Round Mountain, Blanco etc. You will hear Bastrop on the Bastrop simulcast site. It also depends on which radio you’re wanting to set up and how it handles different sites within the larger system. Hope this helps.

Keep in mind, the two layers actually have different coverage areas. Some sub-sites are co-located and some are not. One layer focuses on county wide operations and the other on E620 areas.


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[krdaniel55]

Thanks for the info. I have set them up per each county and actually pick up transmissions. Using a TRX 2 and am pretty happy with it.

 

[Project25_MASTR]

Not sure what you mean by ‘main area’ but in general you should set up the different counties as different ‘systems’. Austin and Travis county public safety are carried on simulcast 1. But, for example you will hear Blanco county talk groups on one of the sites out there - Round Mountain, Blanco etc. You will hear Bastrop on the Bastrop simulcast site. It also depends on which radio you’re wanting to set up and how it handles different sites within the larger system. Hope this helps.

Rumor has it is that the two simulcast layers are going to be merged into a single layer along with all of the current IR sites in Travis County.

 

[krdaniel55]

Rumor has it is that the two simulcast layers are going to be merged into a single layer along with all of the current IR sites in Travis County.

Is that good or bad?

 

[Project25_MASTR]

Just means some of the regionalized department usage will be going away.

 

[willdanl]

Rumor has it is that the two simulcast layers are going to be merged into a single layer along with all of the current IR sites in Travis County.

Does that mean the IR sites will carry all traffic?

 

[KevinC]

Does that mean the IR sites will carry all traffic?

I interpret it as "IR" sites are going away and will be absorbed in a huge simulcast...but I could be wrong. (but of course we know IR doesn't exist in the P25 world )

 

[Project25_MASTR]

I interpret it as "IR" sites are going away and will be absorbed in a huge simulcast...but I could be wrong. (but of course we know IR doesn't exist in the P25 world )

That’s the rumor.

I mean, IRs do technically exist in the P25 world as they can handle P25 CAI, just on a 3600 bps control channel.

CoA still calls them IRs though which is why the name as stuck. Easier than saying wide-area sites.


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