Repost: corrected unintended long lines.
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In a previous thread, I mentioned that my befw11s4-based outdoor access
point was experiencing the well-known hangs during high throughput and
that I had used an SNMP power controller driven by monitor scripts to
power cycle the box as a solution. I also mentioned that after a
prolonged deep freeze (several weeks at minus 20 degrees F or colder),
the unit 'healed' and had not experienced further hangs.

Now that the weather is warmer, I can report that it continues to
operate without hanging during high throughput. The nature of the
'repair' is however unknown, and speculation is welcome. The unit
remained under power during the severe cold period, and connectivity
on the LAN port was uninterrupted, however the radio drifted off channel
and clients could not connect until the temps rose to above zero degrees
F. for some days. One could imagine some trivial dimensional changes
at the pcb level, or perhaps something more fundamental involving
changes in capacitor chemistry, IC bonding wire integrity, discrete
components changed in value or who knows what in the silicon is
at work? In any case the results seem to be permanent and decidedly
for the better.

Michael