The JBX01494 100GBASE-ZR4 QSFP28 Transceiver represents a cutting-edge solution for enterprise networking environments requiring high-capacity, long-distance optical connectivity. This QSFP28 module delivers 100GB data rates over distances up to 80 kilometers on singlemode fiber, making it exceptionally suited for metropolitan area networks (MANs), campus interconnects, and data center-to-data center links. **Key Features & Specifications:** This transceiver operates on 9/125 singlemode fiber architecture with Duplex LC/UPC connectors, ensuring optimal signal integrity and minimal insertion loss. The 100GBASE-ZR4 standard incorporates forward error correction (FEC) technology, providing enhanced reliability and performance over longer transmission distances. The module's metal case with integrated laser transmitter ensures superior electromagnetic shielding and thermal management, maintaining consistent performance across operating temperatures from 0 to 70°C (32 to 158°F). **Standards & Compliance:** Qualified to IEEE 802.3bm and QSFP28 MSA (Multi-Source Agreement) standards, this transceiver guarantees interoperability with major networking platforms. It carries comprehensive safety certifications including Class 1 Laser designation, FDA compliance per 21CFR 1040.10, TÜV and UL certifications, and full RoHS/ELV compliance per EU Directive 2002/95/EC. **Compatibility & Integration:** Direct compatibility with Arista networking equipment makes this an excellent replacement for the OEM QSFP-100G-ZR4 module. Custom brand programming is available for OEM and reseller applications, allowing seamless integration into existing network infrastructure. **Advantages:** With dimensions of 5.0" x 4.0" x 2.0" and manufactured in Vietnam and China with strict quality controls, this transceiver combines compact form factor with reliability. Free standard shipping on orders over $99 from convenient US locations in California and South Carolina ensures rapid deployment. **Applications:** Ideal for enterprise data centers, service providers, campus networks, and any environment requiring reliable 100GB connectivity over extended distances. The 80km reach over singlemode fiber eliminates costly repeaters for many deployments while maintaining exceptional signal fidelity.