CBO QSFP28 100G CWDM4 Transceiver module for 100 Gigabit Ethernet, QSFP28 form factor

CBO QSFP28-100G-CWDM4 is a QSFP28 transceiver module designed to deliver 100 Gigabit Ethernet over single-mode fiber using CWDM4 wavelength multiplexing. The module fits a standard QSFP28 form factor and is intended for high-density data center and enterprise network environments. It supports hot-pluggable installation and provides a compact solution for switch-to-switch links, uplinks and aggregation ports where reliable, high-speed optical connectivity is required.

Advantages

This QSFP28 100G CWDM4 transceiver offers compact, high-bandwidth connectivity in a QSFP28 form factor that simplifies deployment in dense rack environments. Using CWDM4 wavelength multiplexing reduces the need for multiple fiber pairs while maintaining 100G throughput over single-mode fiber. The module’s hot-pluggable design enables quick replacement or upgrades without powering down equipment, and its compatibility with common 100G networking platforms ensures interoperability in typical data center and enterprise setups.

Suitable for

• 100G switch-to-switch connections in data centers
• Server and storage uplinks requiring 100 Gigabit Ethernet
• Aggregation links and spine-leaf topologies
• Enterprise WAN links over single-mode fiber using CWDM4

Key specifications

• Form factor: QSFP28
• Data rate: 100 Gigabit Ethernet
• Fiber type: single-mode fiber
• Optical technology: CWDM4 wavelength multiplexing
• Connector interface: duplex LC (typical for CWDM4 implementations)
• Hot-pluggable: yes
• Typical reach: designed for short- to medium-range single-mode links (refer to vendor distance guidelines)

How to use

Install the QSFP28 transceiver into a compatible QSFP28 port on a switch, router or optical transceiver cage while the host device is powered on, observing ESD precautions. Connect single-mode duplex LC fiber cables to the transceiver’s optical ports, ensuring correct polarity. Verify link status and interface configuration on the host device; configure appropriate port speed and protocol settings for 100G Ethernet. For replacement or maintenance, hot-swap the module by removing it straight out of the port and inserting a new QSFP28 module, then check link negotiation and diagnostics.

Recommendations

Use single-mode fiber and LC duplex patch cables rated for CWDM4 applications, maintain proper fiber polarity and cleanliness, and follow data center cabling best practices. Confirm compatibility with the host equipment and consult the vendor’s distance and operating conditions to ensure expected performance.