Network transceiver module CBO QFX-QSFP-40GE-SR4-BO, QSFP+, 40 Gbit/s, 850 nm, multimode

CBO QFX-QSFP-40GE-SR4-BO is a QSFP+ network transceiver module engineered for 40 Gbit/s Ethernet over multimode fiber at 850 nm. The module uses four parallel transmit and receive lanes to provide aggregated 40 Gbit/s throughput for short-range links in data centers, aggregation switches, and server-to-switch connections. It is designed for high-density environments where space and port consolidation are important, enabling straightforward upgrades of existing 40G ports and compatible switch interfaces.

Advantages

The QSFP+ form factor delivers a compact, hot-pluggable solution that reduces rack space while maintaining high throughput. Operating at 850 nm with multimode fiber, it supports short-reach connections with low power consumption and consistent signal integrity. Its four-lane parallel optic design simplifies cabling for 40 Gbit/s links and is compatible with standard MPO/MTP cabling assemblies for simplified installation and maintenance.

Suitable for

• 40 Gbit/s short-range Ethernet links in data center top-of-rack and spine architectures
• Server-to-switch or switch-to-switch aggregation within enterprise networks
• High-density switching environments where multiple 40G ports are required
• Migration paths from multiple 10G links to consolidated 40G connectivity

Key specifications

• Interface type: QSFP+ form factor
• Data rate: 40 Gbit/s aggregated (four 10 Gbit/s lanes)
• Wavelength: 850 nm
• Fiber type: Multimode fiber (MMF)
• Optical design: Four-lane parallel optics
• Typical reach: short-range multimode links (data center/enterprise distances)
• Hot-pluggable: Yes

How to use

Insert the QSFP+ transceiver into a compatible switch or host port according to the device manufacturer’s installation instructions, ensuring the module is fully seated and latched. Connect the multimode MPO/MTP fiber assembly matching the parallel lanes orientation and maintain proper fiber bend radius. Verify link status and data rate through the switch interface or management software. For replacement, power down the port if recommended by your equipment vendor, remove the existing module, and install the new transceiver following anti-static handling procedures.

Usage recommendations

For reliable operation, use multimode fiber cabling rated for the intended reach (OM3/OM4 as appropriate), keep connectors clean, and follow manufacturer guidelines for operating temperature and ESD precautions. Validate compatibility with your switch model and firmware to ensure optimal performance of the 40 Gbit/s link.