The JBX02166 1000BASE-BX40-D SFP transceiver is an enterprise-grade optical module engineered for demanding network applications requiring extended-distance transmission. With a remarkable 40km reach capability over single-mode fiber, this module enables organizations to establish reliable, high-speed connectivity across metropolitan and campus-wide network deployments. Technical Excellence: This bidirectional transceiver operates at 1Gbps using dual wavelengths (1490nm TX / 1310nm RX), delivering simultaneous transmission and reception over a single fiber strand. The 9/125 micrometer single-mode fiber core ensures optimal signal integrity and minimal attenuation across extended distances. As a certified Cisco GLC-BX-D40 replacement, it provides seamless integration with existing Cisco networking equipment without compatibility concerns. Robust Construction & Safety: Built with a protective metal case and integrated laser transmitter, the JBX02166 withstands demanding network environments. It achieves Class 1 laser certification and meets comprehensive safety standards including UL/FDA 21CFR 1040.10, TUV certification, and LN #50 7/2001 compliance. RoHS and ELV directive compliance ensures environmental responsibility while maintaining peak performance. Optimal Connectivity: The simplex LC/UPC connector design provides reliable, low-loss optical coupling with industry-standard equipment. The UPC (Ultra Physical Contact) finish minimizes back-reflection, critical for maintaining signal quality across 40km distances. The module's compact 5x4x2mm form factor fits standard SFP slots without requiring external adapters. Performance & Reliability: Qualified to SFF-8472 extended-reach BiDi specifications, this transceiver exceeds standard IEEE 802.3ah requirements. It operates reliably across 0-70°C temperature range, suitable for both climate-controlled data centers and field deployments. The 90-day limited warranty provides peace of mind for critical network investments. Applications & Use Cases: Ideal for campus networks, metropolitan area networks (MANs), and long-distance ISP connections. Network administrators can deploy this module for carrier-grade backbone connectivity, disaster recovery links, or remote office connectivity. The custom brand programming option allows enterprise organizations to maintain consistent network asset identification. Ships from strategic US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99, ensuring rapid deployment and cost-effective procurement.