A PON takes advantage of (WDM), using one wavelength for downstream traffic and another for upstream traffic on a (ITU-T, typically OS2). BPON, EPON, GEPON, and have the same basic wavelength plan and use the 1490 nanometer (nm) wavelength for downstream traffic and 1310 nm wavelength for upstream traffic. 1550 nm is reserved for optional overlay services, typically RF (analog) video.
• : On July 26, 2021, Google announced that Google Fiber would expand into Woods Cross, Utah. This service will be available to Woods Cross City residents in the spring of 2022. • : On October 8, 2021, Google announced that Google Fiber would expand into South Jordan, Utah. The goal is to have "service in some areas in early 2022".