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Old 03-17-2015, 05:54 PM   #21
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A pair of airgrid devices, aimed at one another, function just like a very long Ethernet cable made of air. You use them to connect two Ethernet switches together over a great distance.
Encryption?
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Old 03-17-2015, 06:01 PM   #22
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^ Same company I was going to link to.

It's overkill for your application, but we use their AirGrid devices to link multiple buildings together. You could put up a pair of those, and then a local WAP in the barn. They are insanely cheap:

Amazon.com: AirGrid M5-HP 23dBi Grid 5GHz CPE 24vdc POE 300mW: Computers & Accessories



A spare one I have in the office:

[IMG]https://www.miataturbo.net/attachment.php?attachmentid=135601&stc=1&d=1426513 004[IMG]
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How do these do in a high interference area? Is it bothered by a lot of electrical noise?
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Old 03-17-2015, 06:21 PM   #23
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Oh I get it. You could receive the signal but ... not send one back.
I've never tried connecting my phone to one of them, but I *think* that the AirGrid devices are communicating with each other via a signal which is not compatible with standard 802.11 WiFi. In other words, they're not WiFi access points, they're dedicated ethernet extenders.

Again, I could be wrong, but I don't remember seeing anything in their software config which led me to believe that you could connect directly to one with a phone.




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Encryption?
No idea, never looked into it.



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Threadjack.

How do these do in a high interference area? Is it bothered by a lot of electrical noise?
We use them in midtown Manhattan, which is about the noisiest RF environment you can imagine short of an area that is, at that exact moment, having a nuclear weapon detonated above it.
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Old 03-17-2015, 07:12 PM   #24
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Encryption?
Dual_XOR algorithm to keep the hackers busy.

Or you can enable the Dual_EC_DRBG algorithm if you want everyone (including the NSA) out of your private **** browsing session.
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Old 03-17-2015, 11:44 PM   #25
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If you do decide to run something in a trench I'd recommend going fiber with a couple of cheap switches that have SFP ports in them at each end. Then you don't have to worry about ground differential issues or lightning etc.
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