For fiber optic connectors to mate between each other they need couplers, also called adapters, these elements come in many versions allowing to connect simplex or duplex cables. However, setting up a fiber optic connection to your router can seem daunting if you're unfamiliar with the process. Unlike active devices like switches or transceivers, couplers require no electrical power to function. These can behave like a typical Ethernet switch. They play a crucial role in various applications, such as telecommunications, data centers, and fiber-to-the-home (FTTH) installations. In this comprehensive. When it comes to proper fiber optic coupler selection, you will have to consider the effectiveness of the application in splitting and distributing optical signals without losing or interrupting the signal. If you choose poorly, the server signal will not be strong, there will be delays in.