Ortronics 1U rack mount fiber cabinet for patching applications OR FC01U P. The 1U 1.75 high fiber cabinet for patching applications is optimized for integration with the Mighty Mo 6 rack system OR MM6710, OR MM6810 & Seismic Rack OR MM6710S with 10.5 channel depth. Each fiber cabinet accepts up to three adapter panels or three Momentum 1U cassettes.