(Optical Access Network) refers to an Access Network made up of optical transmission links. This is in contrast with older technologies, which typically use copper links composed of twisted-pair or coaxial cables. OFDM

Abbreviation for optical access network. A network technology, based on passive optical networks (PONs), that includes an optical switch at the central office, an intelligent optical terminal at the customer's premises, and a passive optical network between the two, allowing services providers to deliver fiber-to-the-home while eliminating the expensive electronics located outside the central office.