The JBX01255 40GBASE-PSM4 QSFP+ Transceiver represents a premium solution for high-speed, long-distance optical networking. Designed to meet IEEE 802.3ba standards and SFF-8436 specifications, this transceiver delivers exceptional 40Gb/s throughput while maintaining signal integrity over extended distances. **Key Technical Features:** This optical transceiver operates at 1310nm wavelength, enabling reliable transmission over 10 kilometers of singlemode fiber with 9/125 micrometer core specifications. The MTP/MPO-12 connector architecture provides superior signal density and simplified installation compared to traditional LC connectors. With data rates reaching 40GB, it supports next-generation datacenter, service provider, and enterprise backbone applications requiring substantial bandwidth. **Performance & Reliability:** Built with a robust metal case housing an advanced laser transmitter assembly, the JBX01255 maintains consistent performance across operating temperatures from 0 to 70°C (32 to 158°F). This wide operating range ensures reliable functionality in both air-conditioned data centers and outdoor enclosures. The transceiver has undergone rigorous testing to meet Class 1 laser safety standards and FDA 21CFR 1040.10 compliance, providing confidence in long-term deployment reliability. **Compatibility & Integration:** Fully compatible with Cisco's QSFP-4X10G-LR-S specifications, this module drops seamlessly into existing Cisco equipment, eliminating costly hardware upgrades. The PSM4 10km singlemode configuration makes it ideal for campus networks, metro area deployments, and data center interconnection scenarios. **Compliance & Sustainability:** RoHS and ELV compliant per EU Directive 2002/95/EC, this transceiver meets modern environmental and sustainability standards. Multiple safety certifications including TUV and UL approval demonstrate commitment to safety and quality. **Value Proposition:** Offering free standard shipping on orders over $99 and featuring a 90-day limited warranty, this transceiver delivers enterprise-grade performance with exceptional value. Custom brand programming is available for OEM applications. Whether replacing OEM components or building new networks, the JBX01255 provides reliable 40Gb/s connectivity at competitive pricing.