Unique reasons for outages

Worked on telecoms on the railway, 

We had a under rail crossing circuit which we were sure was the issue why we had intermittent Comms down the track.

After arguing with the customer they eventually paid to have this 200m section of cable replaced. We found literally a rat's nest of cables where the local rats had made home! It would have been lovely and warm for them!

Cost us and the customer loads to get sorted!

I was even testing the cables at one point in the snow!