[Aironet] Bridge BR 500 E wireless gets blocked?!

[Dardan B. <da...@ip...>]

Hi all,
first let me describe you the situation: we have an point to point link =
with two Aironet BR 500 E bridges to this site and another BR 500 E is =
connected to it and acts as an access point. It works fine, of course, =
but sometimes, and recently quite often, the wireless communication =
simply blocks. It just drops all the connections. It happened earlier =
but it started to be very often (it seems to us, at least) when one =
other organization mounted an directional antenna (24 dBi) just a meter =
or so away from our omni and heading right "thru" that omni. They use =
the new Cisco bridge.
Has anybody of you experiences similar to this, the wireless =
communication on the bridge to fail?
And btw, what are those two jumpers inside?
Regards and thank yous,
Dardan