On Mon, Nov 29, 2010 at 1:19 PM, Dan Parsons <[email protected]> wrote:
> Another test you can do is connect one end of the fiber cable to the
> switch and look at the other end of the cable through the electronic
> viewfinder of a digital camera. They can usually see the light coming
> through, which is at a wavelength the human eye can't detect. It
> usually looks like a bright white light. This works very well for 1Gb
> fiber connections - I haven't had luck with this at 10Gb for a reason
> I've yet to determine. Some digital cameras block this wavelength but
> none of my iPhones or blackberries ever have.

But don't stare into the fiber.  That's a laser, not just a light.
Low power unless you're using long distance GBICs, but still a laser.
Shine the output of the fiber onto something else, like paper, then
view as above.
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