Aruba J4858D SFP Transceiver Module 1000BASE SX

The Aruba J4858D 1000BASE-SX SFP transceiver is a hot-pluggable optical module that provides 1 Gbps Gigabit Ethernet over short-range multimode fiber for enterprise networks. It is intended for use in switches and routers, delivering 1000BASE-SX links for intra-building or campus deployments where reliable high-speed fiber connections are required. The module uses a duplex LC connector and operates in full-duplex mode over multimode fiber with a wavelength of 850 nm, supporting distances up to 550 meters. It conforms to IEEE 802.3z and the SFP MSA and features a compact SFP form factor for easy hot-swapping in dense equipment racks and data-center wiring closets. The MPN is J4858D, and it is commonly replaced by J4858C or JD118B in enterprise networks and data centers seeking compatible 1000BASE-SX fiber links.