The JBX01254 40GBASE-PSM4 QSFP+ transceiver represents a premium solution for organizations seeking reliable, high-capacity optical networking infrastructure. As a direct replacement for Arista QSFP-40G-PLR4 modules, this transceiver delivers enterprise-grade performance without compromising compatibility or cost-effectiveness. **Technical Specifications:** This transceiver operates at 40GB/s data rates utilizing 1310nm wavelength transmission over 10-kilometer singlemode fiber (9/125 core diameter). The QSFP+ form factor provides compact integration into standard networking equipment, while MTP/MPO connectors enable reliable multi-lane connectivity. Compact dimensions of 5x4x2 inches facilitate easy installation in high-density port environments. **Performance & Reliability:** Built with precision laser transmitter technology and housed in a metal case, the JBX01254 withstands demanding data center conditions. Operating temperature range from 0°C to 70°C ensures consistent performance across seasons and climates. Full IEEE 802.3ba compliance guarantees interoperability with qualified networking infrastructure. **Safety & Compliance:** The module carries comprehensive international certifications including Class 1 Laser, TUV, UL/FDA (21CFR 1040.10), and LN #50 7/2001 designations. RoHS and ELV compliance ensure environmental responsibility, while EU directive 2002/95/EC adherence supports global deployment. **Deployment Applications:** Ideally suited for campus backbone networks, data center interconnects, and metropolitan area network (MAN) deployments requiring extended reach without regeneration. Compatible with Arista switching platforms, enabling seamless integration into modern network architectures. **Support & Warranty:** Includes 90-day limited warranty coverage and custom brand programming capabilities for OEM requirements. Ships from U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on qualifying orders, ensuring rapid deployment with minimal logistics overhead.