Create a centralized rack location for connector-panel termination and patching with a 4U Corning closet connector housing. The black, rack-mount enclosure holds up to 12 connector panels, providing higher panel density where multiple fiber terminations must be kept together in a communications rack. Its 4U height makes capacity and rack-space planning straightforward. CCH-04U fits fiber distribution frames and telecommunications rooms where panel-based connectivity needs a protected, organized mounting location. Install the housing in the rack, then populate it with the connector panels required for the site’s termination and patching arrangement. The enclosure keeps those panels grouped in one serviceable rack position rather than distributed across separate mounting points. Within the CCH housing range, this version is defined by its 4U rack footprint and 12-panel capacity. That combination suits installations that need more panel positions than compact housings while remaining within a standard rack-mounted enclosure format. The black finish provides a consistent appearance alongside rack equipment and patching hardware.