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RoIP

DS0038

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Nov 16, 2015
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Lansing
Has anyone had experience with using RoIP for in building issues? We are a PD on an 800MHz, encrypted, repeater network, P25 non-trunked system. The schools in our town find a DAS cost prohibitive. I need to help get the officers radio signals out of the school building dead zones to hit the nearest receive site. I was told Motorola's Smart Connect is only available for trunked systems. I have seen some Rayethon RoIP products, wondering if anyone has experience with RoIP in this application. Thank you
 

cavmedic

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They could put remote receivers in the schools and use ROIP as the “wireline” back to the comparator if it’s a voted system.

Another option would be low power repeaters at the schools that would act like smaller sites or cells that could be part of the larger system. If simulcast , could make timing a bit challenging. But can be done.

There are many ways to skin that cat, but ultimately the school or the system AHJ should be bringing in professionals to look at every aspect and come up with solutions.

If it’s a serious concern, then the funding should be made available and done correctly.
 

DS0038

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I agree, they build nice buildings and should consider DAS as part of life safety, but they don't. Thank you for the information, it helps.
 

DS0038

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Messages
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Lansing
They could put remote receivers in the schools and use ROIP as the “wireline” back to the comparator if it’s a voted system.

Another option would be low power repeaters at the schools that would act like smaller sites or cells that could be part of the larger system. If simulcast , could make timing a bit challenging. But can be done.

There are many ways to skin that cat, but ultimately the school or the system AHJ should be bringing in professionals to look at every aspect and come up with solutions.

If it’s a serious concern, then the funding should be made available and done correctly.
It is a voted system.
 

cavmedic

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They could easily put a dedicated RCVR , or even a mobile using a ceiling mount antenna in the problem spots of the schools, tie it into one of the many gateways on the market , and feed it back to the comparator for whatever channel on the system.

As for the backhaul from the school to the site, they could do an air mux, one of the many microwave links available if there is line of site, they could use a T-1 from the school to site, cradle point or another cellular type, a tunnel over public internet ( that would be last resort).

There are many ways to do it , but all will cost something.
 

DS0038

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Messages
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Lansing
They could easily put a dedicated RCVR , or even a mobile using a ceiling mount antenna in the problem spots of the schools, tie it into one of the many gateways on the market , and feed it back to the comparator for whatever channel on the system.

As for the backhaul from the school to the site, they could do an air mux, one of the many microwave links available if there is line of site, they could use a T-1 from the school to site, cradle point or another cellular type, a tunnel over public internet ( that would be last resort).

There are many ways to do it , but all will cost something.
Thank you, I appreciate it.
 

70cutlass442

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Thank you, I appreciate it.
What repeaters are you guys using and how are they connected? I had the same issue, but with VHF P25. We added a repeater to the high school and linked via microwave to the main repeater. The repeaters not only vote, but the portables use "vote scan" to select the strongest site. I want to say we were in it for about $6000 including the repeater and microwave gear. Much better than a building wide DAS.
 

mcjones2013

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I agree, they build nice buildings and should consider DAS as part of life safety, but they don't.
See if your local governing body can get it written into the building code as a requirement for any new builds and renovations.
 

70cutlass442

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And then the Government exempts itself from local codes.
Schools are rarely exempt from local code. But it's a moot point as this building seems to have already been built and most code is not retroactive to existing construction.
 

cavmedic

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Can’t speak for the OP, but in a corrupt Commonwealth like PA, schools are their own Governmental agency within the municapalities.

One school district could span two or three separate municipalities. So each school building can be governed by different municipal codes than the rest of them . ( PA schools are not County run and have their own elected governing body)

And when the local government is run by elected volunteers as well , up to and including the zoning boards, the Fire Marshall is appointed by the said group of elected volunteers ( not part of the Fire department )

Things happen or they dont, or may be found swept under the carpet.
 

Project25_MASTR

Millennial Graying OBT Guy
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Texas
BDA systems are a last resort. Seeing too many issues pop up with increased noisefloors at sites due to the high amount of BDA usage.
 
Joined
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Indiana does not have any requirements that I'm aware of, I've heard the building coalition has a strong presence in the state capitol and watches for code changes which could add costs to building owners and developers.
It's obvious some special interests groups that sell and install these systems take a different view of 'public safety'.

A multi millionaire was being interviewed on TV years ago, he something like
"any time there is a gap between someone's perspective of how hard a problem is to solve and the technical reality it provides a way to make a profit."
 
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