It is permissible for fiber optic cable to be wrapped or coiled as long as the minimum bend radius constraints are not violated. As long as it's coiled using the right hand rule, it will provide negative feedback. Otherwise you'll get positive feedback, which will boost not only the noise, but your ego too. You jest but young me thought that connecting a second Cat5 run from switch to switch would increase bandwidth. Instead. Fiber optic cables are categorized based on their deployment environment: indoor fiber optic cables and outdoor fiber optic cables. On long runs, use proper lubricants and make sure they are compatible with the cable jacket.