You might consider obtaining a license for 220 MHz or 450 MHz for the SCADA 
application, you will have much better propagation in comparison to 900 MHz.

From: AF <af-boun...@af.afmug.com> On Behalf Of Mathew Howard
Sent: Tuesday, August 16, 2022 10:22 AM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: [ External ] Re: [AFMUG] 900 MHz PtP

You'd want PTP-450i, not PMP, which is going to be much cheaper (you'd still be 
looking at over $1k for a link though).

But yeah, that doesn't sound very promising... 900mhz isn't going to go through 
rock.

You should be able to get an old PMP-100 AP and SM for next to nothing if you 
really want to try it.

On Tue, Aug 16, 2022 at 9:57 AM Craig Baird 
<cr...@xpressweb.com<mailto:cr...@xpressweb.com>> wrote:
I was afraid that would be the case. I guess I'll probably have to pitch the 
450i to them. Although honestly, I'm not really all that certain 900 MHz will 
even cut it. This is for the city water company. They have a well up a canyon. 
About 1/4 mile down the road, they have a cistern. They have Internet at the 
cistern and want to get it connected to the well because they want to install 
some security cameras and a DVR at the well. Problem is that there's a rock 
outcropping between the two sites. Back in my WISP days, we did 900 MHz through 
trees. But I never tried it through rock. It was finicky enough through trees, 
so I'm not sure I even want to try going through a rock/hill. I figure there 
might be some reflection off the canyon walls that might help, but for the cost 
of a 450i (especially the AP), I'm not sure I want to gamble on it. That's why 
I was hoping for a cheap solution. Maybe I'll try the eBay route and see what I 
can find.

Craig


On Tue, Aug 16, 2022 at 4:04 AM Adam Moffett 
<dmmoff...@gmail.com<mailto:dmmoff...@gmail.com>> wrote:
I think the 450 is all you've got.

For me, nlos isn't worth pursuing anymore. The link degrades over years as 
trees grow and there's nothing much you can do about it.  I would rather say 
"no" and pursue something else with my time.   But If I had to do 900MHz I 
think 450i is the only reasonable choice that I'm aware of.

You could hunt for old cards or old ubnt on eBay I guess.

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________________________________
From: AF <af-boun...@af.afmug.com<mailto:af-boun...@af.afmug.com>> on behalf of 
Craig Baird <cr...@xpressweb.com<mailto:cr...@xpressweb.com>>
Sent: Tuesday, August 16, 2022 2:12:04 AM
To: AnimalFarm Microwave Users Group <af@af.afmug.com<mailto:af@af.afmug.com>>
Subject: [AFMUG] 900 MHz PtP

Is there a good source for an inexpensive, but reliable 900 MHz PtP, solution 
these days? Looking for something for a client that needs a nLOS link. All I 
can find is Cambium 450, which seems crazy expensive for what I'm looking for. 
Back in my WISP days, I seem to recall you could throw together a pretty cheap, 
reliable 900 MHz solution with Mikrotik, but it seems those have gone the way 
of the dodo. Seems UBNT doesn't sell 900 MHz stuff anymore either. Guessing the 
small band size probably made 900 MHz impractical for delivering the speeds 
generally required these days. Can anyone point me at anything?

Craig

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