An optical Distribution Frame (ODF) or patch panel is the starting point for optical cables, most commonly found in rack cabinets in Head End (HE)/Central Office (CO)/Point of Presence (POP)/Data Centre (DC) or smaller cabinets or enclosures. They protect connections with a lockable DCX CABINET 10-HOUSING 84x36x15, LEFT-RIGHT. This 2026 expert guide explains the functions, placement, structure, and application scenarios of ODFs and fiber patch panels-and includes a deep engineering FAQ that resolves real-world deployment challenges.