LC Keystone Adapter for Patch Panel The fiber optic solution for your modular Patch Panels The DIGITUS® Snap-in adapters for Patch Panel offer you the easiest solution to expand empty fields of your Patch Panel or to cover them. The LC Keystone frames contains a slot in each case for LC plugs and are therefore optimal to optimize the cabling of your Patch Panel. All DIGITUS® Snap-in adapters are available in the colors grey or black. Also available are special LC couplers without flanks. Technical details