FO patch cables are defined components of an internationally standardized structured cabling of ISO/IEC11801. Historically, many different connectors have grown in structured cabling, whereby the following are still relevant: LC, SC, E2000, MPO/MTP A fiber optic patch cable represents the shortest connection between a passive cabling port and an active network port or a point-to-point connection of two active network ports. Quality classes allow a qualitative differentiation of the FO patch cables depending on the network service Equivalent names for patch cables: patch cord, adapter cable, connection cable, hybrid cable, jumper, connection cord Features of EFB FO patch cables Aramid yarn reinforced strain relief Halogen free and flame retardant jacket according to IEC-60754-2, IEC-60332-1 and IEC-61034 EFB FO connectors meet the min. Quality class Grade B/2 according to IEC-61753-1 for singlemode and Grade A/1 for multimode according to IEC-.