In EPON networks, SFP (Small Form-factor Pluggable) optical modules are commonly used for their hot-swappability and compact size. When selecting an EPON optical module, consider specifications such as: Transmission Distance: Typically up to 20km. Wavelength: 1490nm downstream . In today's connected world, EPON (Ethernet Passive Optical Network) is a game-changer for delivering blazing-fast internet. This guide dives deep into EPON technology, its benefits over alternatives like GPON, and the critical role of optical modules. In this step-by-step introduction to EPON modules, we will delve into the basic concepts, various types, benefits. The optical module serves as a crucial component in optical fiber communication systems, operating at the physical layer, which is the lowest layer in the OSI model. The PON module is the core component to realize fiber access such as FTTH (Fiber-to-the-Home), FTTB (Fiber-to-the-Building), and FTTO (Fiber-to-the-Office). AscentOptics can provide EPON OLT SFP optical transceivers for OLT equipments, it include different type, like PX20+, PX20++and PX20+++ according to different optical power. On the EPON ONU side, We can also provide.