[aklug] Re: large scale wireless question

From: Jeremy Austin <jhaustin@gmail.com>
Date: Wed Oct 19 2011 - 11:45:18 AKDT

On Wed, Oct 19, 2011 at 11:38 AM, Shane R. Spencer <shane@bogomip.com>wrote:
> Check out UniFi.
>
> Inexpensive. Awesome.
>

True.

>
> http://ubnt.com/unifi - It comes with PoE Adapters which you can make a
> spiffy little
> passthrough rack mount. It isn't 802.3af PoE compatible without an adapter
> in line.
> http://ubnt.com/8023af <- not sure if it works well with unifi APs.
>
> And while you're at it.
>
> http://ubnt.com/airvision
>
> The most difficult part is understanding the interference in the hotel (I
> did "The Coast"
> here in town a while ago). Since there are very few non-overlapping
> channels it's
> difficult to arrange access points so that they do not overlap. Some APs
> have "auto" mode
> to help deal with this.. but they don't appear to have a channel blacklist
> to not select
> overlapping channels.
>

Here's the keep it simple skinny. For 20mhz channels, in 2.4ghz (normal
'wifi'), only channels 1, 6, and 11 are non-overlapping. Use manual channels
and stagger them. Identify external sources of interference and negotiate if
necessary. (Be a good neighbor: the cardinal rule of unlicensed wifi.)

While you're at it, any ubiquiti device has a java-based full res spectrum
analyzer, something that cost $1200 not too long ago.

jermudgeon

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Received on Wed Oct 19 11:45:48 2011

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