CBO QSFP28-100G-CWDM4 transceiver module — 100G CWDM4, QSFP28 form factor

The CBO QSFP28-100G-CWDM4 transceiver module is a 100 Gigabit QSFP28 fiber optic transceiver designed for short to medium reach 100G Ethernet links. It integrates four optical lanes into a single QSFP28 form factor to provide high-density parallel optics for data center switches, routers and aggregation equipment. The module supports coarse wavelength division multiplexing (CWDM4) to carry four channels over a single multimode link or compatible single-mode infrastructure, and it is intended for hot‑swap installation in systems that accept QSFP28 modules.

Advantages

This QSFP28-CWDM4 transceiver provides a compact, high-density solution for 100G connectivity with four parallel lanes in a single package, reducing port space and simplifying cabling. The CWDM4 wavelength scheme allows reliable 100G transmission over the specified short to medium distances while maintaining low power consumption and interoperability with standard QSFP28 interfaces. Hot‑swap capability enables easy field replacement without system downtime.

Suitable for

• 100 Gigabit Ethernet links in data center top-of-rack and leaf-spine architectures
• Network aggregation and spine connectivity between switches and routers
• Short- to medium-reach fiber links in campus or metropolitan networks where CWDM4 is supported
• Environments requiring high-density fiber optics and easy module replacement

Key specifications

• Form factor: QSFP28 (quad small form-factor pluggable)
• Data rate: 100 Gbps aggregate (4×25 Gbps lanes)
• Optical technology: CWDM4 wavelength division multiplexing
• Reach: designed for short to medium distances suitable for data center interconnects (per vendor reach class)
• Interface: duplex fiber via MPO/MTP connector compatible cabling
• Power consumption: low-power QSFP28 class module (typical consumption depends on operating conditions)
• Hot‑swappable: supports in-service insertion and removal
• Operating environment: typical commercial temperature range for network equipment

How to use

Install the transceiver into a compatible QSFP28 port following your system vendor’s insertion instructions, ensuring the host device is powered and that the port is configured for 100G operation. Connect an MPO/MTP-terminated fiber assembly routed to the remote QSFP28-CWDM4 endpoint, taking care to observe correct polarity and secure connections. After physical installation, verify link status and operational parameters through the host device management interface and monitor alarms or diagnostics as supported by the platform.

Recommendations

To ensure reliable performance, use certified MPO/MTP fiber assemblies and verify that patch panels and transceivers along the link support CWDM4 specifications. Avoid excessive fiber bend radius and keep connectors clean. Confirm compatibility with the switch or router firmware and QSFP28 port settings before deployment; perform link validation and monitor signal diagnostics during initial operation.