Choosing between 400G and 800G optical modules depends on your workloads, scale, and budget. What are Optical Modules?In modern fiber-optic and Ethernet networking, OEM SFP modules play a critical role in ensuring high-speed, reliable data transmission across switches, routers, and data center infrastructure. As network bandwidth demands continue to grow—driven by cloud computing, AI workloads, and high-density. 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. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. To learn more about Azure pricing, see the Azure pricing overview and details page. You. Customs quotas are trade policy tools that limit the quantity or value of certain goods that can be imported or exported during a specific period. Speed up your network and lower your costs with innovations in optics technology and manufacturing.