Fiber media converters, also known as fiber transceivers or Ethernet media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair such as Cat5 or Cat6 cable with fiber optic cabling. Fiber Media Converters are used to easily connect fiber cabling to different types of devices, cables or networks. While linking fiber and copper together is the most common application, Fiber Media Converters also enable users to link Single Mode to Multimode or extend the data transmission distance of a Multimode network. They are the perfect solution to convert and extend various types of data signals throughout your network. If you have two devices or LANs that do not match due to different speeds, operation types, modes, or cable types, keep reading.Optical line terminals (OLT) are used by service providers as the endpoint hardware of a passive optical network (PON). Their main functions include conversion between the electrical signals used by the service provider’s equipment and the fibre optic signals used by the PON network; and the coordination of multiplexing between the conversion devices on the optical network terminals (ONT).t is the optical terminal device in the fiber access network, which provides users with multiple service interfaces. The network side of Optical Network Units is the optical interface. As for the user side, it's the electrical interface.