Premier 62.5/125-µm duplex fiber patch cords with a low smoke, zero halogen jacket. Fiber optic patch cables are a defining factor in ensuring your network to perform at its highest level. Patch cables are a critical component used between a patch panel or wall boxes and active components such as switches routers etc. They must be of the highest quality to ensure connectivity.Today's increasing demand in bandwidth requires patch cables that must exceed old industry standards. Our Black Box fiber optic patch cables have a maximum insertion loss of 0.3dB per termination (0.2 dB typical).