The TC3004 Fiber Optic Mode Converter converts multimode to single mode, or vice versa, in a variety of LAN and Telephony communication network environments. In this. FO media converters for Ethernet and fieldbus enable you to convert your copper interfaces to interference-free fiber optics without the need for complex surge protection, shielding, and equipotential bonding measures. How it works: A media converter has two ports: one for SMF and one for MMF. It receives the optical signal on one port, converts it into an electrical signal, and then retransmits it as an optical. In practical applications, there are usually three methods for converting multimode to single-mode fiber or vice versa. We will introduce each method one by one next.