Signal Combining (Reverse Operation) While most splitters are used for signal division, many models can also function in reverse—combining multiple input signals into a single output. This is useful in scenarios such as fiber optic testing, where signals from multiple devices need to be transmitted. Fewer fibers are used on the side of the network feeding the splitter. The FDH is also known by diferent names. Addresses are reconfigurable by jumpers in this configuration and the Home Run configuration. ) The configuration below has individual splitters at a central location, but. A fiber-optic splitter, also known as a beam splitter, is based on a quartz substrate of an integrated waveguide optical power distribution device, similar to a coaxial cable transmission system.