For something like GPON, looking at which customers are down will help get
an idea if it's a power issue or fiber cut. Some customers have UPSes so
that will help determine that.

 If you really want to track fiber cuts, you can do a "loopback" at the far
end of a fiber by allocating 2 lines to that purposes, tracking if the
ethernet link passing through that loop ever goes down.

There are SFPs with very limited built-in OTDRs but really you need to send
a tech onsite to do anything useful.

On Wed, Feb 20, 2019, 6:22 AM Matt Hoppes <[email protected]
wrote:

> With wireless - it's very easy to determine where the source of an
> outage is.... can I access the local side?  If so, then dispatch to
> remote side..... if not, then dispatch to local side.
>
> How do you do that with fiber?  Especially GPON?  How do I know if an
> outage is caused by "power out to end points" or if something just
> "drove through/dug through my fiber lines", without dispatching someone
> first to the local side to shoot an OTDR?
>
> Basically, how do you efficiently dispatch to resolve an issue in a
> timely fashion with fiber?  Is there a way to shoot an OTDR from an SFP
> optic so you know if it's a break or a remote end issue before even
> dispatching a tech?
>
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