Reduce fiber consumption without changing the operating model. This Cisco 1000BASE-BX40 SFP uses a 1490 nm wavelength and is designed for BiDi deployments that carry Gigabit traffic over a single strand of fiber. That makes it a strong fit for access and aggregation networks where fiber pairs are limited or expensive to extend. As a remanufactured module, it gives infrastructure teams a cost-conscious way to maintain Cisco-compatible optics inventory while supporting the same deployment patterns expected in production environments. It is especially useful when you need to replace a failed transceiver, standardize spares, or expand a link without reworking the physical plant. The value here is operational clarity: a fixed-wavelength SFP for 1000BASE-BX40 designs, aligned to Cisco hardware and suited to disciplined network planning. For teams managing budgets, spares, and uptime together, that combination matters. Choose this module when the network needs reliable Gigabit optics, single-fiber efficiency, and a remanufactured part that fits established Cisco infrastructure.