The JBX01222 40GBASE-LR4 QSFP+ transceiver is a next-generation optical module engineered to meet the demanding requirements of modern data center and enterprise networking environments. Delivering exceptional 40GB data rates over extended 10km distances via single-mode fiber infrastructure, this module provides the performance and reach necessary for large-scale network deployments. Key Technical Specifications: This QSFP+ transceiver operates using 9/125 single-mode fiber with Duplex LC/UPC connectors, ensuring compatibility with standard fiber infrastructure. The module achieves IEEE 802.3ba compliance and SFF-8436 standards, guaranteeing interoperability across certified networking equipment. Operating temperatures range from 0-70°C (32-158°F), providing stable performance in various environmental conditions. Performance & Compatibility: Built specifically for Arista equipment, the JBX01222 replaces OEM part number QSFP-40G-LR4 while delivering equivalent or superior performance at competitive pricing. The module's compact 5x4x2 inch form factor fits standard QSFP+ slots without modification. Two fiber strands enable full-duplex communication, essential for high-speed data center operations. Quality & Compliance: Manufactured to rigorous standards with RoHS/ELV compliance and TUV/UL/FDA certifications, this transceiver meets Class 1 laser safety requirements (LN #50 7/2001). The precision metal case with integrated laser transmitter ensures durability and reliable long-term operation. Custom brand programming options are available for OEM deployments. Applications: Ideal for data center interconnects, campus network extensions, metropolitan area networks (MANs), and enterprise backbone solutions. The 10km reach enables cost-effective connectivity without regeneration equipment, while 40GB speeds support bandwidth-intensive applications including cloud services, virtualization, and high-frequency trading platforms. Warranty & Support: Every unit includes a 90-day limited warranty. Free standard shipping applies to orders exceeding $99, with fast dispatch from Danville, CA or Beaufort, SC warehouses. Custom programming and bulk volume options are available upon request.