... can interface, one optical interface, DIP switch set the rate, use for point to point type, multi-mode fiber 0~2Km, single ... , single-mode fiber 0~20Km, more remote optional, optical interface type: ST/SC/FC optional.pcsCi-af22Two electric ports, two optical portsTwo ... independent standard can interface, two optical interface, DIP switch set the rate, use for chain, star, ring, and ...