SFP transceiver HP Enterprise J4859D 1.25Gbps 20km 1310nm

HP Enterprise SFP transceiver J4859D is a hot-pluggable small form-factor module that supports 1.25 Gbps data rate over single-mode fiber (SMF) up to 20 km using a 1310 nm wavelength. The module uses an LC duplex connector, operates from 0 to 70°C, and requires 3.3 V power. It includes DMI diagnostics and is compatible with HP networking equipment for establishing reliable fiber uplinks in campus, metro or data center environments.

Advantages

The SFP transceiver provides a compact, hot-swappable solution for extending network links over single-mode fiber to 20 km while maintaining a 1.25 Gbps rate. Built-in DMI diagnostics enable monitoring of optical and electrical parameters, aiding fault detection and link maintenance. Compatibility with HP Enterprise switches and routers simplifies deployment and replacement without requiring device downtime.

Suitable for

• Fiber uplinks between switches and routers
• Campus and metro fiber links up to 20 km
• Data center server or aggregation uplinks
• Environments requiring 1310 nm single-mode connections

Key specifications

• Model: HP Enterprise J4859D (SPS-7120WHPE OEM)
• Form factor: SFP (small form-factor pluggable)
• Data rate: 1.25 Gbps (1000BASE-LX)
• Fiber type: Single-mode fiber (SMF)
• Maximum reach: 20 km
• Wavelength: 1310 nm (FP)
• Connector: LC duplex
• Operating temperature: 0 to 70 °C
• Supply voltage: 3.3 V
• Diagnostics: DMI (Digital Diagnostics Monitoring)
• Compatibility: HP Enterprise networking equipment

How to use

Power down is not required for installation; insert the hot-pluggable SFP module into an available SFP port on a compatible HP switch or router until it seats firmly. Connect LC duplex single-mode fiber patch cords, observing correct transmit/receive orientation. Verify link status via the device interface and monitor DMI parameters for optical power, temperature, and voltage to confirm proper operation.

Usage recommendations

Use single-mode fiber and LC duplex patch cords rated for 1310 nm. Keep connectors clean and perform DMI checks after installation to ensure signal levels and environmental parameters are within device specifications.