This Finisar FCMJ-8521-3 compatible SFP transceiver provides 10/100/1000Base-TX throughput up to 100m over a copper connection using a RJ-45 connector. It is guaranteed to be 100% compatible with the equivalent Finisar transceiver. Our TX transceiver modules support 10/100/1000Mbs auto-negotiation and can be configured to fit your needs. This easy to install, hot swappable transceiver has been programmed, uniquely serialized and data-traffic and application tested to ensure that it will initialize and perform identically. It is built to meet or exceed the specifications of Finisar, as well as to comply with MSA (Multi-Source Agreement) standards to ensure seamless network integration. This transceiver is Trade Agreements Act (TAA) compliant. SpecificationsCompatible OEM: FinisarCompatible With OEM Part Number(s): FCMJ-8521-3Connector: RJ-45DOM: Non-DOMForm Type: SFPMedia: CopperReach: 100mSpeed: 10/100/1000BaseSpeed Description: 1-GigabitTransceiver Type: TX