The JBX01221 40GBASE-LM4 QSFP+ Transceiver is a premium optical interconnect solution engineered for modern high-speed networking infrastructure. Specifically designed to support 40 Gigabit Ethernet over multimode fiber (OM3/OM4), this transceiver module enables businesses to leverage existing fiber optic cabling investments while achieving maximum data throughput. **Key Features & Benefits:** This QSFP+ module delivers exceptional performance with 40GB data rates across 150-meter distances on multimode fiber. The Duplex LC/UPC connector configuration ensures secure, reliable connections with minimal signal loss. As a direct replacement for the Ruckus E40G-QSFP-LM4, this transceiver offers plug-and-play compatibility with existing Ruckus switch infrastructure, eliminating costly equipment replacements. **Technical Specifications:** Built to IEEE 802.3ba and SFF-8436 standards, the transceiver features a compact QSFP+ form factor measuring 5x4x2 inches. The metal case construction with integrated laser transmitter technology ensures durability and optimal signal integrity. Operating temperature range of 0 to 70°C accommodates diverse deployment scenarios, from climate-controlled data centers to environmentally challenging network closets. **Safety & Compliance:** This transceiver meets stringent international standards including Class 1 Laser certification (LN #50 7/2001), TUV, UL/FDA compliance (21CFR 1040.10), and RoHS/ELV directives. Custom brand programming is available for organizations requiring firmware customization. **Applications:** Ideal for enterprise data centers, campus network upgrades, and service provider backbone interconnects. The 150-meter MMF reach provides flexibility for both horizontal and vertical cable runs in multi-story buildings. **Warranty & Support:** Backed by a comprehensive 90-day limited warranty with free standard shipping on orders over $99. Ships from strategically located US warehouses for rapid delivery. **Maintenance:** The sealed optical transceiver design requires minimal maintenance. Ensure dust caps remain on unused fiber ports to prevent contamination. Store in a controlled temperature environment when not in use.