🚀 go-pugleaf

In article <1992Oct12.160456.11141@walter.cray.com> hens@snipe.cray.com (Tom Stephens) writes:
>
>
>Can someone tell me how they really work?  Or better yet, point me in a direction where I can read about them?  I am having problems explaining that if two machines are powered off in an fddi ring, they will not isolate the machine in the middle.  Senerio..
[ Senerio deleted to save space]
>---------------------------------
>Tom Stephens
>Corporate Computing and Networks, Chippewa Falls, WI
>Cray Research Inc.  hens@cray.com

Optical Bypass switches are extremely simple devices, just manufactured to
some very exacting standards.  During normal operations a selonoid holds a
concave mirror is a position to reflect light from and to the ring into
fibres that contain the machines receivers and transmiter circuits.  When the
machine is powered off the mirror moves a fraction of on inch (pulled back 
by a spring) causing the light to be transmitted directly from the Primary/
Secondary in to the Primary/Secondary out respectively.  A second type of
bypass switch actually moves little U-shaped fibers to route the
light in the proper direction, but once again is controlled by a selonoid.

I hope this helps a little, it really is hard to explain without a 
visual aid.

Bryan Duff
EIC
Network Systems Corp.  bryand@cascade.ens.tek.com
 
-- 
Bryan Duff
Network Engineer
Network Systems Corp.