Canary's CSC-4D9M1 (multi-mode) is designed for linking Serial RS-422/485 devices over fiber optic segments. They allow the direct connection of 120 Kbps Serial devices via fiber cable links that are electromagnetic, and radio frequency (RFI and electrical surge immune. CSC-4D9M1 converter is ideal for industrial process control, surveillance, and other remote access applications with RS-422/485 interfaces. This compact stand alone unit provide an economic solution for Serial to standard multi-mode fiber conversion.