DWL900AP+ H/W C2 F/W 3.02 heat problem

[Jim Carter]

On Fri, 20 Feb 2004, Kanyaraj Babu wrote:

> I recently purchased a couple of DWL900AP+ H/W c2 F/W 3.02 and I observe
> the units hang repeatedly even in room temperature. To reproduce my
> problem, I have them powered on and after 10 of minutes the units warm
> up. I connect using the Airplus Manager Utility and just hit "Apply" -->
> prompted for password and "OK"  then the LAN interface stops responding
> to pings (lights up though) and the WLAN Indicator goes off. I have to
> wait for a couple of minutes before the unit cools down and I can access
> again (immediate power recycle won't work)....

I don't have any experience with this hardware, but it doesn't sound like 
temperature to me.  

1.  It's boreal winter.  Stick an extension cord out the window; take the
AP, a hub and a laptop outside and try the test.  (In AU or NZ, do this
before sunrise when outside air should be noticeably cold.)  I'll bet it
fails equally.

2.  On my Agere Orinoco access point, when I hit "apply" the thing reboots
itself, which shuts off all interfaces for about 60 seconds.  You may be
seeing a difference in reboot speed between the old vs. new hardware or
firmware versions.

3.  When power cycling, did you wait fully 10 seconds before turning it on 
again?  A cheap IPO detector is a simple capacitor hooked to a gate input 
and fed from +5V through a largish resistor.  If the capacitor is 
discharged, power has just come on, so it thinks.  But after a momentary 
power loss the capacitor will still be charged, and the firmware will omit 
essential initialization.

Hope one of these is helpful!

James F. Carter          Voice 310 825 2897    FAX 310 206 6673
UCLA-Mathnet;  6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA  90095-1555
Email: jimc at math.ucla.edu    http://www.math.ucla.edu/~jimc (q.v. for PGP key)