The S-4607 is a portable full-duplex bi-directional Optical fiber and 3G/HD/SD-SDI converter. It can convert SDI input to OPTICAL output, and convert OPTICAL input to SDI output. The single-mode fiber ensures max 20km reliable transmission, and support hot swap of optical module. The S-4607 is heavy duty housing design, protecting the BNC connectors well, and supplied various screw threads in the bottom, for convenient installing.