Relationship between RWC, Yuma, TWRC etc.

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N9JIG

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What sort of relationship do the various P25 systems in southern AZ have? For instance:

Do they cooperate in assignments of TGIDs and radio ID's?

Is there roaming among them?

Do they share facilities at shared sites (Like the White Tanks)?

Could they be merged at some point to form the nucleus of a statewide system?
 

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It seems there is not as much coordination between these systems as there should be. Back sometime around 2008, the RWC (called PRWN at the time) did a test with the YRCS in creating an ISSI link between the systems. Since the test, there has not been a permanent link created. There have been rumors on creating 4 talkgroups on RWC, TRWC, YRCS, and PCWIN that are permanent patched together for interoperability between systems, but this has not happened yet.

DPS is working with Yuma County and the statewide system that they are building (referred to as AZWINS) is integrated with YRCS. It is nice to see these agencies working together. The Yuma County sheriff has praised DPS for this partnership when he made a trip to New Mexico and his portable worked all over the state where DPS has already built out coverage.

I have made many post on how wasteful it is to have many systems with overlapping coverage in the Phoenix Valley. If all of these were one giant system, there would be so many benefits in terms of coverage, interoperability, cost, etc.
 
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KB7MIB

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The TOPAZ RWC was initially Simulcast D of the RWC, but politics caused the TOPAZ RWC to split off from the RWC. It should be noted that the TRWC TG's are in the 3000-3999 range, which are not duplicated in the RWC, so they could, someday, be relinked for roaming coverage Valleywide.

If the different systems were to be linked into one massive system with inter-roaming capability, I would think that many of the TG ranges would have to be redone. The 1100 range exists in both the RWC (Sky Harbor/Deer Valley/Goodyear) and in the YRCS (ADOT), and that wouldn't play well together.

Someone mentioned in the Maricopa County system thread that that system was at capacity for TG's, which is why it isn't linked to the RWC/TRWC/YRCS. Perhaps the new system will have a much expanded capacity, and with judicious coordination of TG's, it could be linked to the others as well.

John
Peoria
 

N9JIG

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The Maricopa County system is currently a 3600 baud Type II system (actually a P16 system, a Type II with digital and analog voice) so is more limited in the number of TGID's and radio ID's the controller can handle. I think they are working to make it a true P25 system now.

It would seem to make sense to coordinate the TGID's and radio ID's with the other systems but if they can't play nice...
 

KB7MIB

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Yea, the different system owners need to be able to play well with each other. If a conflict arises, they need to be willing and able to make compromises and find a middle ground.

John
Peoria
 

Astrak

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The Maricopa county system is maxed out of radio ID's at the moment. There are multiple systems for redundancy, If one system goes down then those users without a system will automatically switch to the other system. Talkgroups will not be the same, but that realty doesn't matter to the users as they will not have to do anything the radio's will automatically switch to the new talkgroup.
 

APSN556

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The Maricopa county system is maxed out of radio ID's at the moment. There are multiple systems for redundancy, If one system goes down then those users without a system will automatically switch to the other system. Talkgroups will not be the same, but that realty doesn't matter to the users as they will not have to do anything the radio's will automatically switch to the new talkgroup.

When looking at the RWC TG list, its painfully obvious though that MANY agencies went overboard on the number of TG's they are allotted.
 
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