PA Statewide P25 Phase 2 System

W7FDX

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Those mobile radios can reach out and grab far away towers as long as they can see them and reach back. Given the large area ATA covers, it is possible that the tower you are hearing covers a bit of it with RF and so the talkgroups are allowed to roam there. Or, they may just limit the talkgroups to a specific region that goes beyond the counties where ATA operates and Erie Co is part of that region. Regardless, like Dan said, if you're hearing it, a radio using it was affiliated to the site.
I heard it in Elk County the last few days as well off the SB Elliot site.
 

IStebleton

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PA HART is operating a plane crash in Westmoreland County, any clue if they are on OpenSky still or if ops are on the WEST30 P25 site? I am out of range for WEST30 or WEST03 700 tp try to log transmissions
 

HM1529

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PA HART is operating a plane crash in Westmoreland County, any clue if they are on OpenSky still or if ops are on the WEST30 P25 site? I am out of range for WEST30 or WEST03 700 tp try to log transmissions

Why were they a requested element?

Plane makes emergency landing at Arnold Palmer Regional Airport in Latrobe

To answer the comms question...like everyone else, assets are in transition. There was a HART asset working out this way during Ida. No comms on the P25 were noted (so maybe still OpenSky at that time). Tactical comms at the rescue were simplex, which was available in OpenSky radios as well as in the new P25 radios.
 

smorris

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The majority of OpenSky sites will not be "transitioned" to P25. I never bothered to do an exact count of how many of the P25 sites were also OpenSky sites, but I'm sure it's a pretty high percentage, along with some new sites in the mix. Overall it's still just a fraction of the total amount of OpenSky sites, however.

Having hit the cap of 150 sites per zone (RFSS), the state is in the process of acquiring and implementing a second zone controller (RFSS 2), so there are additional sites coming in the future. It will still pale in comparison to the total amount of OpenSky sites (1,000+)
Why would the state need so many sites when VHF signals travel so much farther than the 800MHz system? Especially when using P25 in fringe areas.
 

GTR8000

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Why would the state need so many sites when VHF signals travel so much farther than the 800MHz system? Especially when using P25 in fringe areas.
Of the 150 or so total STARNet P25 sites currently on the air, only around 85 are VHF. That is not a lot for a state the size of Pennsylvania.

There is a lot more to it than simply "VHF travels further". You have to take terrain and topography into account, as well as the distance the lower power mobile/portable inbound signals can travel back to a high power mountaintop site, and of course any critical locations that may be required to have in-building coverage.

There is a lot of engineering that goes into these systems. What may not seem like a big deal to the average person may in fact be fairly complex, especially when you have to deal with FCC requirements for controlling RF propagation and the like.

Bottom line is that sometimes it ain't as simple as you might think it is.
 

maus92

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The majority of OpenSky sites will not be "transitioned" to P25. I never bothered to do an exact count of how many of the P25 sites were also OpenSky sites, but I'm sure it's a pretty high percentage, along with some new sites in the mix. Overall it's still just a fraction of the total amount of OpenSky sites, however.

Having hit the cap of 150 sites per zone (RFSS), the state is in the process of acquiring and implementing a second zone controller (RFSS 2), so there are additional sites coming in the future. It will still pale in comparison to the total amount of OpenSky sites (1,000+)
This is interesting. So the P25 system is operating as an overlay network? How long can the OpenSky network last as it is a legacy technology? I would think that the P25 system will eventually supplant the OpenSky system, and reuse frequency resources currently used by OpenSky sites.
 

KC3ECJ

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This is interesting. So the P25 system is operating as an overlay network? How long can the OpenSky network last as it is a legacy technology? I would think that the P25 system will eventually supplant the OpenSky system, and reuse frequency resources currently used by OpenSky sites.

I think they are replacing OpenSky as soon as it is possible.

All the Penn DOT trucks I've noticed changed antennas.
 

GTR8000

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This is interesting. So the P25 system is operating as an overlay network? How long can the OpenSky network last as it is a legacy technology? I would think that the P25 system will eventually supplant the OpenSky system, and reuse frequency resources currently used by OpenSky sites.
Who said anything about "overlay"? It has been stated clearly since Day 1 that the P25 system will replace the OpenSky system entirely once all users have migrated.
 

bearcat

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I have been monitoring the Allegheny Region Simulcast site for several years with a 436/536 without issue. As we know the 436/536 cannot truly handle simulcast. It appears that they have actually started to simulcast this site or have added a site close to me and I am actually hearing more than one site. I pretty much hear nothing on this site starting about mid- Oct. using the 436/536. I guess it is also possible they are having a problem with this site, but I doubt.

Anybody notice a change?

I should note that Procomm96 has a problem decoding the data stream. Very choppy and slow decode
 

maus92

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Who said anything about "overlay"? It has been stated clearly since Day 1 that the P25 system will replace the OpenSky system entirely once all users have migrated.
So are they installing P25 sites in area currently lacking coverage from OpenSky, or are they actively decommissioning OS sites as the P25 sites in roughly the same coverage areas come online - or both?
 

GTR8000

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So are they installing P25 sites in area currently lacking coverage from OpenSky, or are they actively decommissioning OS sites as the P25 sites in roughly the same coverage areas come online - or both?
I'm not sure what you're confused about here. This has been an ongoing process since 2016. Don't get hung up on buzzwords like "overlay". The simple fact is that the mixed-band P25 system is replacing the 800 MHz OpenSky system. The majority of users are already operating on the P25 system, and once that reaches 100%, they'll completely shut down OpenSky. It has been reported that some OpenSky sites here and there are already decommissioned, but it's certainly not all of them. The P25 system was built out alongside the OpenSky system, and is essentially fully built out at this point. As is common with most systems of this size, they will add sites here and there going forward to provide better coverage in certain areas.
 

maus92

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I'm not confused per se, I'm trying to get some clarity. If the P25 system is fully built out (excluding potential coverage improvement sites,) what is delaying the decommissioning of the Open Sky network? Is it a subscriber unit deployment issue, or a coverage issue?
 

GTR8000

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I'm not confused per se, I'm trying to get some clarity. If the P25 system is fully built out (excluding potential coverage improvement sites,) what is delaying the decommissioning of the Open Sky network? Is it a subscriber unit deployment issue, or a coverage issue?
I would suggest contacting the Statewide Radio Network Division, as only they can provide that answer.

 

talviar

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I'm not confused per se, I'm trying to get some clarity. If the P25 system is fully built out (excluding potential coverage improvement sites,) what is delaying the decommissioning of the Open Sky network? Is it a subscriber unit deployment issue, or a coverage issue?
Purchasing radios at $5-8K a piece times several hundred to several thousand... combined with installation... combined with Covid 19 restrictions and lack of people working......
 

IStebleton

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I was up in Erie yesterday. I seem to pick up ERIE80 better than ERIE40 while on Presque Isle, even though ERIE40 is on the peninsula. That seems odd to me.

While on the way back, I managed to get the Site NAC's for 2 of the Sites on I79 (Already submitted).

Also, I am getting nothing out of the WEST03 tower. I checked from 750MHz-900MHz and got nothing other than the OpenSky CC for WEST03, no P25 stuff.
 
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