The Axiom J4859C - AX is a 1000BASE - LX SFP (mini - GBIC) transceiver module that operates on standard single - mode fiber (SMF) spans up to 10 kilometers and up to 550 meters on multi - mode fiber (MMF). This transceiver is engineered for 100% compatibility with HP networking products, ensuring seamless integration across various HP switch and data center applications. It complies with the Multi - Source Agreement (MSA), allowing it to function effectively in MSA compliant platforms and with other manufacturers' brands within the same 1000BASE link or network. The Axiom J4859C - AX is ideal for high - speed data transmission, making it a reliable choice for enhancing network performance.