The switch has four 1G SFP or 10G SFP+ module slots. The Cisco Catalyst 1000 Series switches are fixed-configuration, Gigabit Ethernet switches that provide entry-level enterprise-class Layer 2 access for branch offices, conventional workspace, and out-of-wiring closet applications. What Is an All-Optical Ethernet Switch? An all-optical Ethernet switch is a network switch whose service ports are. Switch optical modules, which convert electrical signals to optical signals and vice – versa, and optical interfaces, which serve as the physical connection points, play a pivotal role in determining the speed, distance, and reliability of data transmission. Common optical module types such as SFP. In short: The OLT (Optical Line Terminal) is the central control unit of a Passive Optical Network (PON). It converts data signals, manages bandwidth, and connects hundreds of users over a single optical fiber infrastructure. The S5448F-ON 100/400GbE fixed switch comprises Dell Technologies' latest disaggregated hardware and software data center networking solutions, providing state-of-theart, high-density 100/400 GbE ports and a broad range of functionality to meet the growing demands of today's data center.