Gigabit Ethernet operates at 1,250 Mbps over the optical interface. SFP modules come with LC connectors. Typical power consumption is 1 W. °CThe global 400G Optical Module market is poised for substantial expansion, projecting a market size of USD 14. 5% Compound Annual Growth Rate (CAGR) through 2034. This aggressive growth trajectory is directly attributable to the escalating demand for high-bandwidth. The Cisco 100GBASE Quad Small Form-Factor Pluggable (QSFP) portfolio offers customers a wide variety of high-density and low-power 100 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider. The optical power budget represents the maximum allowable signal loss in a fiber-optic link. It is calculated by subtracting the RX sensitivity from the TX power. A higher optical power budget generally means better performance, especially over longer distances. The quality of fiber optic cables. Electrical specifications define a module's form-factor, pinout/interface, supply voltage, and power consumption, which are critical to ensure host board compatibility. These include the module type (SFP, SFP+, SFP28), differential TX/RX pairs, MOD-ABS, SCL/SDA for I²C, typical +3. 3 V supply, and. Deployment flexibility with 800G (dual 400G), 400G, 100G, 50G, 40G, 25G, 10G or 1G modules. Interoperable with IEEE 40GbE LR4 and LRL4 for easier migrations from 10G to 40G and to single mode fiber 100G. The optics alone added another 2,458 watts: 512 QSFP28 LR4 modules, each rated at 4.