The JBX01957 100BASE-BX20 SFP transceiver represents an essential component for building robust, extended-distance optical networks. Engineered to deliver 100Mbps bidirectional transmission over single-mode fiber, this module excels in scenarios where standard 100-meter copper connections prove inadequate. Technical Specifications: The transceiver operates with a 9/125 micrometer single-mode fiber core, providing superior signal propagation characteristics and minimal attenuation over extended distances. Its simplex LC/UPC connector ensures optimal return loss and insertion loss performance. Housed in a durable metal case with integrated laser transmitter technology, the module maintains precise optical alignment and thermal stability across its 0°C to 70°C operating temperature range. Cisco Compatibility & Performance: As a certified Cisco GLC-FE-100BX-U replacement, this transceiver seamlessly integrates into existing Cisco network infrastructure without firmware modifications or compatibility concerns. The bidirectional transmission capability allows efficient utilization of single fiber strands, reducing cabling requirements and installation costs. Standards & Compliance: Qualified to SFF-8472 extended-reach BiDi specifications, the module exceeds standard IEEE 802.3ah requirements. It carries Class 1 laser certification, TUV approval, and UL/FDA compliance under 21CFR 1040.10. Full RoHS and ELV directive compliance ensures environmental responsibility. Applications & Use Cases: Ideal for connecting distant buildings, remote offices, or emergency backup links within metropolitan networks. Common deployments include campus networks, municipal fiber rings, and enterprise WAN connectivity. The simplex configuration suits unidirectional communication scenarios or paired deployments for full-duplex requirements. Reliability & Support: Manufactured in Vietnam and China using quality control standards, this transceiver includes a 90-day limited warranty. Custom brand programming is available for OEM requirements. Free standard shipping applies to orders exceeding $99, with fulfillment from strategically located distribution centers in California and South Carolina, ensuring rapid deployment.