The JBX02178 1000BASE-BX40-D SFP transceiver module represents an advanced solution for enterprise and service provider networks requiring extended-reach, cost-effective connectivity. Operating at 1GB data rates over singlemode fiber, this optical module delivers impressive 40km transmission distances, making it ideal for metropolitan area networks, campus interconnections, and carrier-class deployments. Technical Excellence: This transceiver features wavelength operation at 1550/1310nm, enabling bidirectional transmission over a single fiber strand. The 9/125 singlemode fiber core ensures superior signal integrity and minimal attenuation over extended distances. With a simplex LC/UPC connector architecture, the module provides standardized fiber connectivity compatible with most enterprise network infrastructure. Robustness & Compliance: Manufactured with precision engineering, the JBX02178 houses a reliable laser transmitter in a protective metal case. The module maintains full RoHS/ELV compliance and carries multiple safety certifications including Class 1 Laser designation, TUV, UL, and FDA 21CFR 1040.10 approval. These certifications ensure safe operation in diverse network environments while meeting international regulatory standards. Arista Ecosystem Integration: Direct compatibility with Arista SFP-1G-BXD40-53 specifications ensures seamless integration into existing Arista deployments without firmware modifications. Custom brand programming availability enables OEM integration and private labeling for resellers and system integrators. Performance & Reliability: Qualified to SFF-8472 extended-reach BiDi specifications, this transceiver exceeds standard IEEE 802.3ah requirements, delivering superior performance in challenging network conditions. Operating temperature range of 0-70°C accommodates both indoor and environmentally challenging installations. The 90-day limited warranty provides peace of mind on this critical infrastructure component. Deployment Advantages: Ideal for point-to-point links, network backbone extensions, and disaster recovery connections. The extended 40km reach eliminates the need for expensive regeneration equipment while maintaining 1GB performance. Free standard shipping on orders over $99 reduces deployment costs further.