Distance Problems

Joe Parks jphstap at roinet.com
Thu Aug 14 12:04:16 EDT 2003


On Thu, 2003-08-14 at 01:00, Michael Shuler wrote:
> We are having a problem with ~20 mile PTP link using hostap as in AP
> "master" mode on one side and Client "managed" mode on the other.  The AP
> will show the association with good signal and noise levels but the client
> will not associate.  We also tried using a WinXP laptop hooked up to the
> same PCMCIA card (Zcomax/SMC) and antenna combination with no luck...we are
> however able to associate to an Orinoco AP that is 10 ft. away from the
> hostap AP system (on a different frequency of course) so we know the link is
> physically possible.  We drove 10 miles close and tried the same config
> standing on the ground instead of on the grain elevators (150' each) and it
> worked great.  This would lead me to believe that there is some sort of
> timing issue in the hostap driver that needs to be increased to support long
> distance links.  I noticed that the AP appears to be receiving packets but
> not transmitting any.  Any help would be appreciated.

I seem to recall someone mentioning a while back (check the archives)
that the Prism chipset has a very tight timing that prevents links over
15 miles.   If there is a way to override this I haven't heard about it.



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