Description
The Fujitsu FC9681EL21-I01 is a high-performance optical transceiver module designed for demanding network environments, particularly in enterprise and data center applications. Built with precision and durability, this unit supports high-speed data transmission over long distances using single-mode fiber, making it suitable for backbone infrastructure and high-bandwidth applications. Its compact form factor ensures compatibility with standard SFP+ slots, allowing easy integration into existing networking equipment. The robust metal housing provides excellent EMI shielding and thermal performance, ensuring reliable operation in 10GbE networks.
This model supports a data rate of up to 10 Gbps and typically operates at a wavelength of 1310 nm, with a transmission distance of up to 10 kilometers. It features dual LC connectors for efficient and secure fiber connections and complies with industry standards such as IEEE 802.3ae and SFF-8431. The FC9681EL21-I01 includes built-in digital diagnostics monitoring (DDM), allowing real-time access to critical operating parameters like temperature, voltage, and optical power levels. Ideal for those seeking reliable used network hardware, this transceiver offers a cost-effective solution without compromising on performance or compatibility.

