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jfreak53
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nRAYG-60 True Speed

Sat Nov 09, 2024 4:31 pm

I'm looking at a pair of nRAYG-60's, they say aggregate speed is 2Gbps, but port speed max input is 1Gbps. Anyone test these, is the port speed a 2.5G RJ45 and truly capable of 2Gbps?

I have an RB4011 at each end, my idea is RJ45 SFP+ optic up to antennas, but no point if they don't get 2G speed.

Distance isn't an issue, its only 500m line of sight. Also, what's reliability of these, we are in Northwest Ohio with decent snowy winters?
 
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mkx
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Re: nRAYG-60 True Speed

Sat Nov 09, 2024 5:04 pm

No, ethernet ports are 1Gbps.

"Aggregate speed" is a marketing BS buzzword ... effectively saying that port is full-duplex and can transfer at 1Gbps in both directions simultaneously.

Wireless, OTOH, is half-duplex with large "direction switching" overhead ... so in reality (reality means mix of traffic in both directions, even if asymmetric to certain extent), even with wireless rates approaching 3Gbps (wifi comes with realistic overhead of at least 20-30%), 1Gbps full-duplex ethernet ports won't be bottleneck 99.9% of time.
 
jfreak53
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Re: nRAYG-60 True Speed

Sat Nov 09, 2024 5:18 pm

Got it! Ok, that makes sense. I noticed that this has better distance than the RBLHGG-60ad, so same speeds, but better distance. Is it "worth it"? My max distance is roughly 500 to 600m, but we do have Ohio weather. I've used the RBLHGG-60ad already, but shorter distances, like 150ft type distance only.

Also, is direct line of sight a must at 500m, or can it be a bit off? Like a single building blocking close to point B.
 
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mkx
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Re: nRAYG-60 True Speed

Sat Nov 09, 2024 7:56 pm

In theory link performance depends on how obstructed is Fresnel zone. Which is widest at the link midpoint and gets narrow at both antennas. Which means that for best performance clear direct line of sight is not enough, even some vicinity has to be obstruction-free. OTOH for link that has "some power to spare", clear LOS is not a requirement if enough of Fresnel zone is unobstructed. Maximum width of Fresnel zone is proportional to wavelength.

In reality with 60GHz links Fresnel zone is so narrow that link basically needs clear LOS to work. So you'll have to get antenna on site B out of building's "shadow" this way or another.
 
jfreak53
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Re: nRAYG-60 True Speed

Sun Nov 10, 2024 12:12 am

Awesome! Thanks for the info! So based on that I found a fresnel calculator:

https://proxim.com/products/network-too ... ance-zone/

I gave it 60GHz and 0.16 miles. It gave me 1.86r, based on that site I need roughly 2ft under my line of sight if I'm reading the calculations correctly?

I found a second site and it gave me the same numbers. If that's all I gotta get I can get that, shouldn't be difficult since the first building is two stories and the tallest thing in town once I put a pole up pointing at Building B. There are some trees, however, those trees are only 1.5 stories tall, under where the pole would be.

Thanks for the help!
 
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Re: nRAYG-60 True Speed

Sun Nov 10, 2024 11:51 am

... if I'm reading the calculations correctly?

Yup. And that's "required clearance" at the middle of link, it's less closer to either antenna. But it's a good rule of thumb to have such clearance along the whole length of link. Beware of trees, they (or at least some of them :wink:) tend to grow in height so in a few years time they might start to obstruct your link.

Good luck with building the link!

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