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Compact SFP transceiver module with silver metal housing and black LC optical port, labelled HP J4858A 1000BASE-SX 850nm 550m

Brute Networks

Brute Networks HP J4858A 1000BASE-SX 550m 850nm SFP transceiver

SKU CH-TTNR-MADYS

A 1000BASE-SX SFP transceiver for multi-mode fibre links up to 550 m at 850 nm

  • Device TypeTransceiver
  • StandardsMMF
  • Wavelength850nm
  • Fiber CableMulti-mode Optical Fiber
  • ProtocolsHCRP, SPP
  • Ports1000Base-SX
  • 550 m reach over multi-mode fibre
  • 850 nm wavelength for short-range links
  • 1 Gbps data rate on a single LC port
  • Commercial 0–70 °C operating range
  • Third-party module built to MSA standards

HP J4858A 1000BASE-SX SFP Transceiver

This HP J4858A compatible SFP transceiver delivers 1 Gbps connectivity over multi-mode fibre at 850nm wavelength. It targets network engineers and system integrators who need reliable short-range links for Gigabit Ethernet switches and routers in campus or data-centre environments.

Upgrade From Copper Or Longer-Reach Optics

The module replaces copper uplinks or older 100 Mbps fibre interfaces where 550 metre reach over OM2 multi-mode fibre is required. The jump is justified when existing infrastructure uses LC duplex cabling and the link budget fits within the 1000BASE-SX standard without needing single-mode distance.

550 Metre Multi-Mode Capacity And Headroom

The transceiver comfortably handles full-duplex Gigabit traffic across 550 metres of OM2 fibre with standard LC connectors. Headroom diminishes on higher-bandwidth OM3 or OM4 plant where modal dispersion is lower but the 850nm VCSEL source and receiver sensitivity remain the limiting factors for reach.

Highlights

  • 550 m reach over multi-mode fibre
  • 850 nm wavelength for short-range links
  • 1 Gbps data rate on a single LC port
  • Commercial 0–70 °C operating range
  • Third-party module built to MSA standards

Specifications

BrandHP
ModelJ4858A
Device TypeTransceiver
StandardsMMF
Wavelength850nm
Fiber CableMulti-mode Optical Fiber
ProtocolsHCRP, SPP
Ports1000Base-SX
Max Distance550m
Transfer Rate1 Gbps
LEDsPower, Link/Activity, Full-Duplex, and Speed
Temperature0� ~ 70� C
Weight1 oz.
DisclaimerThird Party product. Part number J4858A is property of HP.

Questions about this item

Will the LC duplex connector on this SFP mate with my OM2 patch cables?

Yes, the module uses a standard LC duplex interface that plugs directly into OM2 multi-mode patch cords for 1000BASE-SX links.

After inserting the transceiver, why does the Link/Activity LED stay dark even though the switch port shows up?

The most common mistake is crossing the Tx and Rx fibres; swap the two LC ferrules at one end so each transmitter faces the opposite receiver.

How often should I clean the LC ferrules on this 850 nm module to keep the 550 m reach?

Inspect and clean both ferrules with a dry click cleaner every time you disconnect or at least once per year in permanent installations.

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