A device that interfaces disparate transmission media, making the necessary signal conversions at the Physical Layer. For example, a media converter is required to interface a fiber optic transmission system such as Passive Optical Network (PON) to the copper unshielded twisted pair (UTP) used in inside wire applications on the customer premises. See also Physical Layer, PON, and UTP.
A device that converts from one type of media to another. It typically refers to a hardware device that connects different transmission media; for example, from twisted pair to coax or from twisted pair to optical fiber.