Transceiver CBO QSFP28-SR4 100G 850nm optical module

The Transceiver CBO QSFP28-SR4 100G 850nm optical module is a hot-pluggable QSFP28 form-factor transceiver designed for short-reach 100 Gigabit Ethernet links. It operates at 850 nm using multimode fiber optics to provide high-bandwidth, low-latency connections between switches, routers and servers within data centers and enterprise network environments. The module supports parallel multi-mode transmission and is intended for use in top-of-rack, aggregation and spine network segments where short-distance, high-density interconnects are required.

Advantages

The module offers a compact QSFP28 package that enables four-channel 25 Gbps per lane operation for a total of 100 Gbps throughput while maintaining compatibility with standard QSFP28 ports. Its hot-pluggable design simplifies installation and replacement without powering down equipment. Using 850 nm multimode optics provides cost-effective short-reach performance with low power consumption and predictable signal behaviour over multimode fiber.

Suitable for

• Short-reach interconnects in data centers (switch-to-switch, switch-to-server)
• Top-of-rack and spine-aggregation links in enterprise networks
• High-density 100G uplinks and cross-connects over multimode fiber

Key specifications

• Form factor: QSFP28 (hot-pluggable)
• Data rate: 100 Gigabit Ethernet (4 × 25 Gbps lanes)
• Wavelength: 850 nm
• Fiber type: Multimode fiber (MMF)
• Reach: short-reach links over multimode cabling (typical data center distances)
• Connector interface: MPO/MTP parallel fiber connector
• Power consumption: low-power design suitable for high-density ports

How to use

Insert the QSFP28 module into a compatible QSFP28 port on a switch, router or server I/O module while the host device is powered on. Ensure the module is fully seated and locked, then connect the MPO/MTP multimode fiber cable to the module’s connector. Verify link status and speed via the host device management interface and confirm multimode fiber type and polarity are matched on both ends. For safe handling, avoid touching optical interfaces and follow electrostatic discharge (ESD) precautions when installing the transceiver.

Recommendations

Use the transceiver with recommended multimode fiber types (OM3/OM4) and qualified MPO/MTP cabling to achieve specified short-reach performance. Maintain clean connector end-faces and perform end-face inspection or cleaning before mating. Monitor link diagnostics through the host system and follow vendor guidelines for optical budget and channel operating conditions.