While a cut or damaged fiber optic cable can temporarily take your network down, it is possible to quickly fix the cable with the right tools. Accidentally severing an internet cable creates immediate stress, stemming from the sudden loss of service and the worry of a potentially large repair bill. Once these tools are ready, you can start the repair step by step. Specifically fiber used for internet. Following an accidental cut, contacting your internet provider for assistance is a. Here are the steps to repair a cut fiber cable. The first step requires that you find the damage.