Fiber Optic Transceiver CBO QSFP28-100G-SR4 100G SR4 multimode

CBO QSFP28-100G-SR4 100G SR4 multimode is a QSFP28 fiber optic transceiver module designed for 100 Gigabit Ethernet short-reach multimode links. The module supports four parallel lanes at 25 Gbps each, enabling a total aggregated bandwidth of 100 Gbps in a compact, hot-pluggable QSFP28 form factor. It is intended for use in high-density data center environments where short-reach, multimode fiber interconnects are required for server-to-switch and switch-to-switch uplinks.

Advantages

The transceiver offers high-density 100G connectivity in a small QSFP28 package, supporting easy hot-swap installation without powering down equipment. Its multimode SR4 design reduces the cost of short-reach links by using MPO/MTP parallel fiber connections and leverages standard IEEE 802.3bm-compatible signaling for interoperability with supporting switches and network equipment. The module is suitable for environments that require predictable 100G performance over multimode fiber with minimal configuration.

Suitable for

• Data center uplinks between switches and aggregation devices
• High-bandwidth server-to-switch connections within the same equipment room
• Short-reach campus backbone links using multimode fiber
• High-density switch ports where space and power efficiency are important

Key specifications

• Form factor: QSFP28 (hot-pluggable)
• Data rate: 100 Gbps aggregated (4 x 25 Gbps lanes)
• Link type: Short Reach (SR4) for multimode fiber
• Optical interface: MPO/MTP parallel fiber connector
• Wavelength: multimode optics optimized for 850 nm
• Typical reach: short-reach distances over multimode fiber (OM3/OM4 dependent)
• Protocol compatibility: 100 Gigabit Ethernet (IEEE 802.3bm and related standards)

How to use

Install the QSFP28 transceiver into a compatible QSFP28 slot on a switch or server NIC while the host device is powered on, taking anti-static precautions. Connect MPO/MTP multimode fiber patch cables to the module's optical interface, observing proper fiber polarity and channel mapping for SR4 parallel lanes. The module will negotiate link parameters with connected equipment; verify link status and diagnostics through the host's management interface. If necessary, consult the network equipment documentation for transceiver compatibility lists and firmware recommendations.

Recommendations

For reliable short-reach 100G links, use high-quality OM3 or OM4 multimode fiber and MPO/MTP connectors terminated and tested to appropriate standards. Keep fiber connectors clean, avoid sharp bends, and verify channel mapping when deploying parallel SR4 links to ensure correct lane alignment and optimal performance.