The Atheros Deliberant cards will do half and quarter channels on G.

At 10:42 AM 10/1/2009, you wrote:
>If you aren't sectorized, you should do that first.
>
>Neither normal b or g or b/g are ideal in high noise. I don't mix.
>
>I like a little better g-mode on 10mhz channels using radio cards that
>support listening on 5/10 mhz channels like the xr2. (Many listen on
>20mhz) You're more than twice as likely to find a clearer channel.
>
>On Thu, Oct 01, 2009 at 09:58:30AM -0500, Jason Hensley wrote:
> > In 2.4 land, if you have a lot of noise, which protocol is better - B or G?
> > Is it better to run an AP as locked into one mode or is it OK to 
> do a mix?
> >
> > Max I want off of 2.4 customers is 3meg so not that worried about the extra
> > speed that G will provide, but, I would like to know which is more stable?
> > I've always thought that B was more stable overall but just provided less
> > bandwidth.  I've gotten some info that may counter that.  What's the
> > real-world experience with folks in a high-noise environment, combined with
> > a higher useage AP?
> >
> > I've got an AP that we've run in B mode only for a while.  We've started
> > having problems with it - speeds go from 3meg at the customer to 200k and
> > fluctuate constantly.  We've worked with RTS, ACK timeouts, etc etc and
> > nothing seems to have improved the stability.  For testing purposes we put
> > up another AP right next to the one we're having trouble 
> with.  Switched two
> > of our gaming clients to that one (setup as G mode only) and they 
> seem to be
> > doing better, but not quite as good as we feel they could be.  This is on
> > Deliberant AP's (Duos).  The backhaul part of it is not the issue - we can
> > pull close to 15meg back to our office when cabled into the AP.  We have
> > other Deliberant APs that are running MANY more clients than this one so we
> > know it's not limitations of the equipment.  AP is on top of a water tower.
> > Have taken all clients off and brought them back on one by one and it did
> > not reveal anything significant.  With just one customer on the AP started
> > acting up again.  Swapped radios in the AP thinking we could have one going
> > bad and still no luck.
> >
> > 2.4 antennas are H-pol.  We have a ton of noise in the area, but we've been
> > through basically every channel and it did not help either.  Other AP's in
> > the vicinity are performing fine.  Thought of the multipath issue so we
> > raised our test AP up a little higher than the other one.  As I said, the
> > test AP seems to be better, but next to it on top of the tower we can get
> > around 8 or 9 meg down (locked into G mode), but at the CPE's we're still
> > barely getting 2.5-2.8meg.
> >
> > Any thoughts?  We changed everything we can.  The new "test" AP has a 9db
> > antenna compared to the 13db on the "production" AP.  Other than that, they
> > are identical as far as equipment goes.
> >
> > So, back to the subject question though, what's real-world experience with
> > G-only mode in the field?
> >
> >
> >
> >
> > 
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>--
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>Jason Philbrook   |   Midcoast Internet Solutions - Wireless and DSL
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