bobp at purdon.id.au
Thu Nov 9 09:54:51 EST 2017
> Grab an optical fibre scope while you're at it. It's amazing how dirty
> your cable ends and recepticals can actually be.
Absolutely - even brand new cables directly out of the manufacturer's
plastic bags can be filthy. I did have some fibre scope photos of this
> with fibre, the major carrier datacentre operators less so - yes, they
> did it too) as plugging SC cables into SCA recepticals or vice versa.
This.. ..or connectors not properly mated. High attenuation. Push.
Click. Problem solved.
> Have you done optical loss testing? Some network gear can tell you
> directly what your tx and rx power levels are.
Be careful with this - while it can often be a good guide, I have seen
many cases where the diagnostic data says the SFP is transmitting, but
an optical power meter shows nada, zilch, zero, nuffin' (as in no light,
/not/ 0dBm, lol). ..or the launch level is vastly below what the SFP is
reporting it is.
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