An IDF stands for Intermediate Distribution Frame, which is a distribution frame that cross-connects user cable media to individual user line circuits and serves as a distribution point for multipair cables from the main distribution frame (MDF) or combined distribution frame (CDF) to individual cables connected to equipment in areas remote from these frames. IDFs are used in various environments such as telephone exchange central office, customer-premises equipment, wide area network (WAN), and local area network (LAN) environments. An IDF is a free-standing or wall-mounted rack that helps cross-connect user cable media to individual user line circuits and serves as a distribution point for multipair cables from the combined distribution frame (CDF) to separate cables connecting to devices located in different areas of the building. IDF rooms are essentially hubs for telecommunications within a limited area, usually one floor in a large building, and are connected by way of vertical cross-connect (VCC) cables to an MDF. IDF rooms are useful subunits of a wider LAN that make it possible to maintain high data. IDF rooms are used in various settings such as schools, universities, hospitals, skyscrapers, office buildings, apartment buildings, and coworking spaces. IDF rooms contain a cable rack that receives cables from the MDF and links devices on that particular floor to the network through secondary cables and patch panels. IDF rooms also need UPS, or Uninterruptible Power Supply, which provides emergency power to essential IDF equipment in the case of a power outage.