BlueOptics QSFP28 Transceiver QSFP28-LR4-AJ-BO, 100GBASE-LR4, LC-Duplex, Singlemode, 4xWDM, 10 km, DDM, 0–70°C

BlueOptics QSFP28-LR4-AJ-BO is a 100G QSFP28 transceiver module designed for singlemode fiber links using LC-duplex connectors. It implements the 100GBASE-LR4 standard with 4xWDM channels to carry four 25 Gbps lanes over a single fiber pair, enabling transmission distances up to 10 km. The module includes Digital Diagnostic Monitoring (DDM) to report operating parameters and is specified to operate in an ambient temperature range of 0–70°C. Intended for data center uplinks and carrier aggregation, this transceiver provides a compact interface for high-capacity network interconnects.

Advantages

The transceiver supports the 100GBASE-LR4 specification with 4xWDM, allowing aggregation of four 25 Gbps channels into a single QSFP28 form factor. LC-duplex singlemode connectivity permits use with standard patch cords and fiber infrastructure. Built-in DDM enables real-time monitoring of optical power, temperature and supply voltage, which helps with diagnostics and link management. The module's 10 km reach covers common access and metro links while the 0–70°C operating range suits typical indoor datacenter environments.

Suitable for

• Data center uplink and spine-to-leaf connections requiring 100 Gbps bandwidth
• Carrier and metro aggregation links up to 10 km over singlemode fiber
• Network equipment with QSFP28 ports and LC-duplex optical interfaces
• Environments where remote monitoring of transceiver parameters via DDM is needed

When it may not be suitable

This transceiver is not suitable for multimode fiber installations or for links that require distances beyond 10 km. It is intended for devices with QSFP28-compatible ports; it will not work in equipment that lacks support for QSFP28 form factor or 100GBASE-LR4 signaling. The operating temperature range (0–70°C) may be inadequate for outdoor or industrial deployments that require extended temperature specifications.

Key specifications

• Form factor: QSFP28
• Standard: 100GBASE-LR4
• Connector type: LC-duplex
• Fiber type: Singlemode
• WDM channels: 4×WDM (four 25 Gbps lanes)
• Maximum transmission distance: up to 10 km
• Monitoring: Digital Diagnostic Monitoring (DDM)
• Operating temperature: 0–70°C

How to use

Install the QSFP28 transceiver into a compatible QSFP28 port on your switch or router according to the host device's installation instructions. Connect singlemode LC-duplex patch cords between the module and the fiber patch panel or remote device. Verify link status and parameters using the host’s management interface; DDM provides readouts for optical power, temperature and voltage. Ensure the connected equipment is configured for 100G operation and that fiber polarity and LC connector cleanliness meet standard optical practice. Follow your network equipment vendor guidance when enabling or disabling ports and when performing transceiver diagnostics.

What to consider before purchase

• Verify your switch or router supports QSFP28 modules and 100GBASE-LR4 signaling
• Confirm the link distance does not exceed 10 km and that singlemode fiber is in use
• Ensure LC-duplex connectors match your cabling and patch panel hardware
• Check operating temperature requirements for your deployment environment

Usage recommendations

For reliable performance, keep LC connector endfaces clean, use certified singlemode fiber cables, and monitor DDM parameters after installation. When integrating into a multi-vendor network, verify interoperability with the host device and apply any vendor-specific compatibility settings if necessary.