The JBX01213 40GBASE-LM4 QSFP+ transceiver module is engineered as a premium replacement for Dell's original 407-BBRB and 407-BBRC optical transceivers. This high-performance component enables seamless 40GB Ethernet connectivity across enterprise data center infrastructures, providing reliable long-distance transmission capabilities essential for modern networking demands. **Key Technical Features:** This QSFP+ module operates at 40GB data rates and supports transmission distances up to 150 meters over OM4 and OM3 multimode fiber cables. The duplex LC/UPC connectors ensure secure, low-loss connections with professional-grade reliability. Built to IEEE 802.3ba specifications, the transceiver delivers consistent performance across demanding network environments. **Performance & Safety:** The module features advanced laser transmitter technology housed in a reinforced metal case, providing durability and optimal signal integrity. Safety certifications include Class 1 Laser classification, TUV, UL, and FDA compliance (21CFR 1040.10), meeting strict international standards. RoHS and EU Directive 2002/95/EC compliance ensures environmental responsibility. **Ideal Applications:** Perfect for enterprise data centers, high-speed server interconnects, and Dell infrastructure expansions. The 150-meter reach over multimode fiber makes it suitable for campus-wide installations without requiring expensive single-mode infrastructure. Custom brand programming is available for value-added resellers and OEM applications. **Specifications Summary:** Operating temperature range: 0-70°C (32-158°F); Dimensions: 5x4x2 inches; Form factor: QSFP+ compact module; Fiber type: Multimode (OM4/OM3); Connector type: Duplex LC/UPC; Warranty: 90-day limited coverage. Ships free from US locations (CA and SC) on orders exceeding $99. This cost-effective alternative to OEM transceivers delivers equivalent performance while reducing infrastructure expenses.