UPC may refer to a type of connector. UPC and UPC (or Ultra - Physical Contact) are fiber optic connectors. Another type is APC (Angled Physical Contact). The polished end of UPC connectors is flat and provides a good connection with low back reflection. UPC connectors are used in fiber optic networks to connect cables to devices such as switches, routers, and transceivers. In a data center, various network components are linked with UPC terminated fiber optic patch cables. Achieving data communication through fiber optic cables another most important concern is the quality of the UPC connection. A poor connection means increased chances of signal loss resulting in decreased network performance.