The JBX01960 100BASE-BX20 SFP transceiver is an optical networking solution engineered for enterprises and service providers requiring extended-reach connectivity over singlemode fiber infrastructure. This module directly replaces Juniper's EX-SFP-FE20KT13R15 and SFP-FE20KT13R15 models while offering superior compatibility and cost-effectiveness. **Key Technical Specifications:** Operating at 100MB data rates, the transceiver utilizes 9/125 micron singlemode fiber to achieve impressive 20km transmission distances. The simplex LC/UPC connector configuration enables straightforward installation in standard SFP slots, supporting one-way transmission for applications requiring dedicated send/receive paths. The extended-reach BiDi capability exceeds standard IEEE 802.3ah specifications, providing flexible deployment options. **Robust Construction & Safety:** Built with a reinforced metal case and precision-engineered laser transmitter, this transceiver withstands demanding data center and field environments. Full compliance with Class 1 laser safety standards, TUV, UL/FDA 21CFR 1040.10, and EU RoHS directive 2002/95/EC ensures regulatory adherence across global markets. **Performance & Reliability:** Qualified to SFF-8472 standards, the module operates consistently across 0-70°C temperature ranges. The 90-day limited warranty and custom brand programming availability provide additional flexibility for integration into existing network infrastructures. **Ideal Applications:** Perfect for campus area networks, metropolitan networks, and long-distance network segments requiring reliable optical transmission. Compatible with Juniper EX series switches and similar SFP-equipped infrastructure. **Additional Benefits:** Free standard shipping on orders exceeding $99, with convenient fulfillment from Danville, CA and Beaufort, SC locations ensures rapid delivery. Custom programming capabilities allow seamless integration into branded environments.