Patch Panel Definition and Use
The patch panel is the most important component in the administration subsystem, serving as the hub for cross-connection between the vertical backbone and horizontal cabling subsystems. Patch panels are typically installed in racks or on walls. With mounting accessories, patch panels can fully support UTP, STP, coaxial cable, fiber optic, and audio/video needs. In network engineering, the commonly used patch panels are twisted-pair patch panels and fiber optic patch panels.
The function of the twisted-pair patch panel is to cross-connect twisted-pair cables in the administration subsystem, used in the main cross-connect room and each intermediate cross-connect room. There are many models of twisted-pair patch panels, with each manufacturer having its own product series, and corresponding specifications and models for Category 3, Category 5, Category 5e, Category 6, and Category 7 cables. In specific projects, refer to the product manual and configure according to actual conditions.
The function of the fiber optic patch panel is to connect optical cables in the administration subsystem, typically used in the main cross-connect room and each intermediate cross-connect room.
Use of Patch Panels
The main purpose of patch panels is to serve as modular equipment for managing front-end information points at the central office. After the front-end information point cables (Category 5e or Category 6) enter the equipment room, they first terminate on the patch panel, with the cables punched down onto the patch panel modules, and then patch cords (RJ45 connectors) are used to connect the patch panel to the switch. In general, patch panels are management devices. For example, without a patch panel, if front-end information points are directly connected to the switch, any cable failure would require re-cabling. Additionally, management would be chaotic, and repeated plugging/unplugging could damage switch ports. The patch panel solves this problem by allowing better management through replacing patch cords.
The quantity and usage are configured based on the total number of network points or the number of network points on a given floor (and adjacent floors, depending on the system design). Different buildings and different system designs result in different patch panel configurations in the main equipment room. For example, if a building has only four floors with the main equipment room on the first floor, and all network points on all floors terminate in this equipment room, then the number of patch panels equals the total number of network points in the building divided by the number of patch panel ports (24-port, 48-port, etc.), plus a certain margin. If a building has nine floors with the main equipment room on the fourth floor, to avoid excessively long cables, each floor may have its own sub-equipment room with switching equipment. In that case, the number of patch panels in the main equipment room equals the number of network points on the fourth floor divided by the number of patch panel ports (24-port, 48-port, etc.).