Cisco GLC-BX-D-I 1000BASE-BX SFP 1490/1310 nm | Industrial Temp — GLC-BX-D-I

Keep fiber connectivity available where standard optics are not enough. Cisco GLC-BX-D-I is a 1000BASE-BX SFP designed for industrial-temperature operation, with 1,490 nm transmit and 1,310 nm receive wavelengths for bidirectional Gigabit Ethernet over a single fiber strand. That matters in remote cabinets, plant-floor network segments, outdoor enclosures, and other places where temperature swings can challenge ordinary transceivers. The bidirectional design also helps conserve fiber infrastructure, which is valuable when conduit space, patch-panel capacity, or installed fiber count is limited. For infrastructure teams, this module is about precision fit: the right wavelength pair, the right SFP format, and the environmental tolerance needed for demanding deployments. For procurement, it supports a higher-value purchase decision than a generic optic because it addresses both link design and operating conditions in one part number. When the network must stay up in less forgiving locations, this is the kind of transceiver that earns its place in the BOM. Ideal For Connecting remote network cabinets in temperature-variable locations Extending Gigabit service over a single fiber strand Deploying optics in industrial or plant-floor network segments Stocking spares for Cisco BX fiber uplinks Why This Product 1 Industrial-temperature rating versus standard commercial optics 2 1000BASE-BX single-fiber design versus dual-fiber transceivers 3 1,490/1,310 nm wavelength pair for bidirectional links 4 Cisco MPN specificity for controlled deployment compatibility