[PLUG] DSL modem

[Russell Evans]

When faced with a problem like this; where the links are tested to be know
goods, the equipment is tested to be a know good, or swapped out to a known
good, that the only thing left to try is environmentals. 

Power, cooling, E&M, ... can all effect things. Way back in the day, ELI in
Seattle had an issue with a OC-12 going down at 3:00 in the afternoon. It
wasn't all the days, but always around three. It took a while for the techs to
notice that the vertical blinds didn't quite meet and the sun came around the
Westin at three ( A sunny day in Seattle, yeah right ). On a sunny day, a beam
of sunshine would poke through the blinds and hit the gap in the door of the
cover of the OC-12 and bounce off of some E&M plating onto the optical
receiver. There was enough light leakage on the receiver that the beam would
over-drive the sensor. 

Thank you
Russell




On Tue, 17 Sep 2002 13:33:09 -0700, Carla Schroder said:

> On Monday 16 September 2002 09:30 am, Russell Evans wrote:
>  > Is the box on a UPS?
>  >
>  > Thank you
>  > Russell
>  >
>  
>  No, it plugs into a surge protector strip, which goes directly to a wall 
>  outlet.  My computers are on APC 500s- does it matter?
>  
>  thanks,
>  Carla
>