Network transceiver module BlueOptics QSFP-40G-CSR4-MM850-NDDM-BO 40 Gbit/s 850 nm

BlueOptics QSFP-40G-CSR4-MM850-NDDM-BO is a quad small form-factor pluggable (QSFP) network transceiver module that delivers 40 Gbit/s aggregate throughput using four 10 Gbit/s lanes. Operating at an 850 nm wavelength over multimode fiber, this module is intended for short-reach links where high-density 4x10G connectivity is required, such as within data center racks and between adjacent distribution switches. The non-DDM variant does not provide digital diagnostic monitoring, simplifying the feature set for environments that do not require real-time optical parameter reporting.

Advantages

The module offers compact QSFP form-factor density combined with 40 Gbit/s performance, allowing consolidation of multiple 10 Gbit/s channels into a single port. Operating at 850 nm for multimode fiber ensures compatibility with common OM3/OM4 cabling for short-distance interconnects. The absence of DDM reduces complexity and potential monitoring overhead in systems that do not utilize diagnostic data.

Suitable for

• Data center top-of-rack and end-of-row aggregation links
• Short-reach multimode fiber connections within campus or enterprise buildings
• High-density switch-to-switch interconnects requiring 4x10G aggregation
• Environments where digital diagnostic monitoring is not required

Key specifications

• Form factor: QSFP (quad small form-factor pluggable)
• Data rate: 40 Gbit/s aggregate (4 × 10 Gbit/s lanes)
• Wavelength: 850 nm
• Fiber type: Multimode fiber (MMF)
• Reach category: Short reach (suitable for OM3/OM4 multimode links)
• Monitoring: Non-DDM (no digital diagnostic monitoring)

How to use

Install the QSFP module into a compatible QSFP port on a switch or other network device while the device is powered down or hot-pluggable according to the host equipment’s instructions. Connect multimode fiber patch cords, ensuring correct MPO/MTP or 4×LC breakout cabling as required by the link architecture. Verify link negotiation and lane configuration on both ends of the connection; configure the host ports for 40 Gbit/s or for 4×10 Gbit/s breakout mode as supported. Since the module lacks DDM, external monitoring tools or switch-level statistics should be used if optical parameters must be observed.

Recommendations

For reliable short-reach performance, use certified OM3 or OM4 multimode fiber and maintain clean MPO/MTP connectors; follow the host device guidelines for breakout configuration and lane mapping. Avoid relying on in-module diagnostics and instead monitor link status via switch counters and external test equipment when needed.