Only the light that is coupled into the receiving fiber's core will propagate, so all the rest of the light becomes the connector or splice loss. End gaps cause two problems, insertion loss and return loss. Fiber optic adapters serve an important role as “connector translators” between incompatible connector styles while maintaining proper physical and optical alignment. Without the proper adapter, signals can degrade or become unstable, which can dramatically decrease the reliability of a network. We terminate fiber optic cable two ways - with connectors that can mate two fibers to create a temporary joint and/or connect the fiber to a piece of network gear or with splices which create a permanent joint between the two fibers. Because there are so many technical possibilities for plugs and splices [Hub 92, Ebe 10], we would like to focus here primarily on general aspects to consider. Gigabit Ethernet (GbE), which is typically a baseband local area networking (LAN) technology, uses digital signaling. When issues like signal loss, slow speeds, or intermittent connectivity arise, systematic troubleshooting is key. This guide will walk you through diagnosing and resolving common. one 1x6 coupler/splitter should have an insertion loss <10dB.