Throughout with AIR-ANT2566P4W-R

[Jernej Vodopivec]

Hi,

I'm thinking of setting bridge between two buildings with AP2600 and AIR-ANT2566P4W-R. The distance between buildings is less than 1,000 feet and there is a clear line of sight.

Has anyone made any kind of a throughput measurement in a such situation with AP1600/2600/3600 and patch antenna AIR-ANT2566P4W-R on both sides?

Jernej

[Stephen Rodriguez]

That's going to depend on the RSSI & SNR of the link. I could theorize that if you used that antenna and were in proper alignment, with good RSSI SNR that you would get good performance.

But that is theory. Have you had any spectrum analysis done to see what interferes are there?

Steve

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[Jernej Vodopivec]

Stephen,

let's assume proper antenna alignment. This link will be established directly over the river so there won't be much noise in the air.
I haven't made spectrum analysis.

Jernej

[Scott Fella]

I have used that as an indoor solution and not really for an outdoor bridge. Here is an link to an excel spreadsheet that can help calculate your estimated throughput and how high up the antennas need to be. What you need to know also is the fresnel zone which is important.

If distance is great and you don't want to figure out how to enclose the AP in a heated or fan cooled enclosure, you should look at a true outdoor bridge solution. Cisco resells the exalt r5005 which I have installed in many locations and work great. You can get up to 160mbps half duplex with these.

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[Jernej Vodopivec]

I can't find link to spreadsheet in your post

R5005 is definitely one of the best solutions, I agree. But it's too expensive for customer.

[Scott Fella]

Here you go... You also have to look at the overall cost to have the AP in an enclosure and all the LMR cable, lightning arresters, etc that you have to purchase in order to use an indoor AP for outdoor bridging. Well... If you want to donut the right way. The r5005 doesn't cost that much more in the end.

http://www.cisco.com/en/US/products/hw/wireless/ps458/products_tech_note09186a008009459b.shtml

http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps458/prod_technical_reference09186a00800a912a.xls

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[Jernej Vodopivec]

This Excel is great tool, thanks.
I was looking for a newer version that would include 802.11N access points 1600/2600/3600 or at least 1040/1140 but couldn't find any. Do you know if it exists at all?

[Scott Fella]

No there isn't one.... The only thing you really need to know is that outdoor bridges like the 1300 and 1400 and mesh will have a higher TX power than any on the indoor access points. So make sure you actually set the TX power correctly. Depending on distance, you might not achieve 802.11n rates.

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[Scott Fella · Accepted solution]

Here is a calc for a 1550 mesh which you can use as an estimate also.

http://www.cisco.com/en/US/docs/wireless/access_point/1550/range/calculator/1552_Link_Calculator_V1.xls

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[Jernej Vodopivec]

Scott, thank you very much for all information! Very helpful!

Jernej

[Scott Fella]

No problem

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