Fibre optic cable tester

Haven't done this for a while, but at the time I was issued with very epensive test kit with a little microscope to look at the cleaved ends and an instertion loss tester transmitter/receiver pair. But that was only because the customers had to be given test sheets listing the test result for every link.

However, I never found one that was marginal - it either worked or it didn't. That may have been because the longest link was only a few hundred metres. Shining a torch down one end would probably have done just as well.

I would suggest that, if you are worried, pick an end and chop it off and reterminate. If that doesn't work, repeat with the other end. If that doesn't work - the mice/rats have eaten the cable.

Would have had equipment down for a couple of days waiting for optical fiber test eqipment to arrive. Test with with trusty pen light showed we had a bad run of cable. Replaced it and had the equipment up and running before the test equipment could be shipped in.