The Ubiquiti UISP UFiber Coexistence WDM Filter (UACC-UF-WDM-XGS) is a Wavelength Division Multiplexing module designed for service providers. It enables the simultaneous operation of XGS/XG-PON and GPON services over a single optical fiber. This filter effectively combines the different wavelengths, allowing for a straightforward upgrade path or the deployment of multiple services on existing fiber infrastructure without needing to run additional cables. The UACC-UF-WDM-XGS is an essential component for building a scalable and cost-effective fiber-to-the-home (FTTH) network.