Transceiver CBO QSFP28-100G-CWDM4 100G CWDM4 QSFP28 optical module

The Transceiver CBO QSFP28-100G-CWDM4 100G CWDM4 QSFP28 optical module is a hot-pluggable QSFP28 form-factor transceiver engineered for 100G CWDM4 transmission over single-mode fiber. It integrates four 25G channels with coarse wavelength-division multiplexing to provide a 100G link suitable for data center uplinks, switch-to-switch connections and aggregation ports. The compact design and standard QSFP28 interface enable easy installation in compatible switches, routers and optical line cards.

Advantages

The module offers four independent 25G channels combined into a single 100G CWDM4 link, providing efficient use of single-mode fiber and simplified cabling. Its QSFP28 hot-pluggable format supports rapid replacement and deployment without powering down equipment. The transceiver is designed for interoperability with standard 100G CWDM4 systems and aims to deliver stable optical performance for short- to medium-reach links in enterprise and data center environments.

Suitable for

• 100G uplinks between leaf and spine switches in data centers
• Aggregation and distribution links in campus and enterprise networks
• Switch-to-switch backbone connections requiring 100G capacity
• Optical line cards and modules with QSFP28 ports supporting CWDM4 optics

Key specifications

• Form factor: QSFP28 hot-pluggable module
• Data rate: 100 Gbit/s via four 25 Gbit/s lanes
• Optical technology: CWDM4 wavelength-division multiplexing
• Fiber type: single-mode fiber (SMF)
• Reach: designed for short- to medium-reach single-mode links (typical data center distances)
• Connector: duplex LC (depending on equipment interface) or MPO/MTP mapped per CWDM4 implementations
• Power consumption: complies with typical QSFP28 module power envelopes

How to use

Install the module into a compatible QSFP28 port while the host device is powered on, following the equipment vendor’s hot-swap procedure. Connect single-mode fiber using the appropriate connector type and ensure correct channel mapping for CWDM4 lanes. Verify link status and lane alignment through the switch or router management interface and monitor optical power and loss to confirm performance. If replacing an existing transceiver, observe electrostatic discharge precautions and follow the original device’s removal instructions.

Recommendations

For reliable operation, use clean, certified single-mode fiber and standard-compliant patch cords. Confirm compatibility with the host device’s QSFP28 port and firmware support for CWDM4 modules. Monitor optical parameters during initial deployment and schedule periodic inspections of connectors and fiber to maintain link quality.