Cisco GLC-BX-D 1000BASE-BX SFP 1490nm | BiDi, Enterprise — GLC-BX-D

Deliver gigabit fiber connectivity where pair count, rack space, and deployment simplicity matter. Cisco GLC-BX-D is a 1000BASE-BX SFP operating at 1490 nm, designed for single-mode fiber links that use bidirectional transmission over a single strand. That makes it a strong fit for access layers, campus interconnects, and edge environments where conserving fiber infrastructure has real value. BiDi optics are often selected when teams need to expand capacity without pulling additional fiber. This module supports that approach with a compact SFP form factor and Cisco compatibility, helping standardize transceiver selection across enterprise networks. It is especially useful in locations where conduit is full, fiber availability is limited, or the cost of new plant is harder to justify than a targeted optics upgrade. For infrastructure teams, the value is straightforward: preserve the physical plant, keep the link count efficient, and maintain a clean migration path to gigabit service. The GLC-BX-D is the kind of component that earns its place by solving a specific network constraint with minimal overhead. Ideal For Campus uplinks over single-mode fiber Access-layer point-to-point gigabit links Edge deployments with limited fiber strands Network upgrades where conduit capacity is constrained Why This Product 1 BiDi design reduces fiber strand requirements 2 1 Gbps operation for gigabit access and uplinks 3 1490 nm wavelength for single-mode deployments 4 Cisco-qualified SFP for standardized environments