·Passive optical networking (PON), like active optical networking, uses fiber optic cabling to provide Ethernet connectivity from a main data source to endpoints.

·OLT, ONU or ONT, and ODN are the main components in a PON network, which has been widely used in FTTH applications thus far. The reduced cabling infrastructure (with no active elements) and flexible media transmission make passive optical networks more ideal for home Internet, voice, and video applications. Additionally, passive optical networks can also be applied in college campuses and business environments, providing cost-effective solutions. As PON technology has continued to improve, the potential applications have expanded as well.