The Hewlett Packard Enterprise J4859D is a hot-pluggable 1 Gbps 1000BASE-LX SFP transceiver that transmits over single-mode fiber at 1310 nm for links up to 10 km using a duplex LC interface. Designed for enterprise networking, it is compatible with Aruba switches, routers, and networking devices and complies with IEEE 802.3z and the SFP MSA. Common replacements include HPE Aruba J4858D 1000BASE-SX SFP and JD119B 1000BASE-LX SFP, with J9151D listed for 10G deployments as a related option.
