Hi, > The choice is really big, Google gives many vendors and a wide range > of models of Ethernet protectors.
yes....so why did you originally ask about them? ;-) > Well, er, http://en.wikipedia.org/wiki/Galvanic_isolation ;-) yes, I believe in wikipedia. sorry, the term is not one I was familiar - know it by many other names - the only 'galvanic' I knew was 'galvanic corruption' but thats because of my background in chemistry :-) > There are many methods, optical is one of them. What kind of optical > isolation devices do you use? SFP/SFP+s (as another posted) - so purely optical links , and also media converters (so the local converter ends up being sacrificial but they are cheap(er) than most other options we were aware of > My experience so far is that the current model we use does not really > protect. I will report later which model is that. The location where > the last switch died is remote and normally unmanned. this is why running direct copper between 2 buildings that are on different grounding potentials etc - and running copper outside a building generally - are frowned on (if not breaking any local building regulations as each country has their own laws regarding that aspect). its similar to the need for lightning arrestors and isolators for wireless (both on coaxial feeds from antennae to AP but also on the feed from switch to AP) - its not a direct strike to worry - that will fry - its a nearby strike that will also fry your kit alan _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
