where i am at we have kinda the same issue, we are a cable shop but tech control puts in switches and what not, some of the folks are not that handy with fiber. If they have a problem we let them shoot the fiber, if they say that the fiber somehow died, we go out to shoot it ourselves. What we have told them is this 1. You shoot the path to verify its not the patch cords or end equipment 2. if its not your issues DO NOT BY ANY MEANS TOUCH THE BACK OF THE BOX THAT IS OUR WORLD. We take care to the back of the patch panel. But still we have issues with them not testing patch cords. K.I.S.S start with the little things, move to the fiber, unless someone has cut it, run it over, or a bomb hit it, it shouldnt just stop hope this helps at one point someone just needs to stand up and take responsiblity and make other understand CABLE DAWGS- The Backbone of Comm