Hubbell FPR3SP fiber optic interconnection shelf is an economical and efficient way to organize and protect fiber connections and splice trays in rack mount fiber optic applications. This shelf is especially useful in situations where a high density of patch cord terminations is required. The shelf is designed to fit in a single rackspace (1U) and accepts three snap-in six-pack adapter panels for a standard port capacity of 18 fiber connections. The six-pack adapter panels are recessed horizontally in the hinged swing-out tray for superior patch cord protection. Snapping in Hubbells high density SixPack adapter panels provide a total port capacity of 24 ST or 36 SC ports.