BlueOptics QSFP28 Transceiver R7D12A-BO — MPO, 100GBASE-SR4, Multimode 4×850nm, 100m, DDM/DOM, 0–70°C

BlueOptics QSFP28 Transceiver R7D12A-BO is a short-range 100GBASE-SR4 optical module designed for high-density data center and switch interconnects. The transceiver uses a multi-fiber MPO connector and four parallel 850 nm lanes to deliver aggregated 100 Gbps over multimode fiber up to 100 meters. The module supports digital diagnostics (DDM/DOM) for real-time monitoring of optical parameters and operates across an ambient temperature range of 0–70°C, making it suitable for standard indoor networking environments.

Advantages

The module provides compact QSFP28 form-factor connectivity that enables 100 Gbps links in a single port while maintaining compatibility with multimode fiber infrastructures using MPO connectors. Built-in DDM/DOM simplifies link diagnostics and monitoring of parameters such as optical power and temperature. The specified operating temperature range and multimode reach up to 100 meters make the transceiver appropriate for typical data center horizontal and aggregation layer connections.

Suitable for

• 100G data center switch-to-switch or switch-to-server interconnects over multimode fiber
• Short-reach uplinks in campus or enterprise networks where MPO trunking is used
• High-density patch panels and MPO cassette deployments in wiring closets

When it may not be suitable

This QSFP28 SR4 transceiver is intended for short-range multimode fiber links and is not suitable for single-mode fiber or long-haul applications. It cannot replace transceivers that require different wavelengths, fiber types, or extended reach beyond the 100 m multimode specification. Use in outdoor or extreme temperature environments beyond 0–70°C is not recommended.

Key specifications

• Form factor: QSFP28
• Data rate: 100 Gbps (4×25 Gbps lanes)
• Optical standard: 100GBASE-SR4
• Wavelength: Multimode 4×850 nm
• Maximum reach: Up to 100 meters over multimode fiber (OM3/OM4 dependent)
• Connector type: MPO multi-fiber connector
• Diagnostic support: DDM / DOM for optical and temperature monitoring
• Operating temperature: 0 to 70 °C

How to use

Install the QSFP28 transceiver into a compatible QSFP28 port on your switch or transceiver-capable device, ensuring proper carrier latch engagement. Connect an MPO-terminated multimode fiber trunk or patch cable to the module’s MPO receptacle, observing correct fiber polarity and MPO key orientation. Use the host device management interface to verify link status and read DDM/DOM parameters for optical power, temperature, and other diagnostics. When removing the module, handle it by the housing and use dust caps to protect the MPO interface.

What to consider before purchase

• Ensure the target switch or device supports QSFP28 SR4 transceivers and is compatible with third-party modules.
• Verify multimode fiber type (OM3/OM4) and cable distance to ensure reliable 100 m reach.
• Confirm MPO connector polarity and patching scheme in your cabling infrastructure.
• Check that operating environment temperatures remain within the 0–70°C range.

Usage recommendations

For reliable performance, use MPO-terminated multimode fiber certified to OM3 or OM4 standards, maintain clean fiber endfaces and MPO connectors, and monitor DDM/DOM readings periodically to detect signal degradation or thermal issues. Match the transceiver specifications with the host device requirements and cabling plan before deployment.