Getting the hang of it
I have about 100' of underground OM4 multi-mode fiber optic duplex cable. I'd like to check to make sure it is OK before I hook it up to my switches. Looking at YouTube and Amazon there are many VFI, Visual Fault Indicators, that look like they might do the job, but I'm not sure of witch one to buy? Or, is there something else that would be better that doesn't cost a fortune?