Connect optical fibers to the optical modules on the device, matching the numbers on the optical fibers to those on the ports. Screenshots and graphics in this book may differ slightly from what you see due to differences in release versions or your computer operating system. Every effort has been made to ensure that the information in this manual is accurate. The Quick Start Guide shows how to connect the NBG and access. Install dust plugs on idle optical ports. The working rate, duplex mode, and negotiation mode of the two ends of the optical interface are different. Keep optical fibers more than 10 cm (3. ) away from power. Explore NBG's download library.