Transceiver CBO QSFP28 100G LR4 Fiber Optic module

The Transceiver CBO QSFP28 100G LR4 Fiber Optic module is a hot-pluggable, four-lane 100 Gigabit Ethernet optical interface in QSFP28 form factor. Designed for long-reach single‑mode fiber links, this module implements LR4 wavelength-division multiplexing to deliver four 25G lanes over a duplex LC connection. It is intended for high-speed uplinks and backbone connections in metro networks and data center interconnects, offering a compact footprint and compatibility with standard QSFP28 ports.

Advantages

This QSFP28 100G LR4 module provides long-reach transmission over single-mode fiber with low power consumption and a standardized QSFP28 form factor for straightforward installation. Multi-lane 25G signaling enables compatibility with existing 25G PAM4/Ethernet ecosystems and supports high aggregate throughput for uplink and aggregation roles. The module is designed to meet common interoperability expectations for transceivers in network equipment and to maintain signal integrity over extended distances.

Suitable for

• 100 Gigabit Ethernet uplinks between switches and routers
• Data center interconnects over single-mode fiber
• Metro and campus backbone links requiring long-reach optical transmission
• Aggregation and spine connections in leaf-spine network architectures

Key specifications

• Form factor: QSFP28 (quad small form-factor pluggable)
• Data rate: 100 Gbps (4 × 25 G lanes)
• Optical interface: Duplex LC
• Transmission type: LR4 (long reach, wavelength-division multiplexing)
• Fiber type: Single-mode fiber (SMF)
• Typical use distance: long-reach links suitable for metro and data center interconnects
• Hot-pluggable for easy replacement and upgrades

How to use

Install the QSFP28 module into a compatible QSFP28 slot on a switch, router or network adapter while the host device is powered on if hot-pluggable support is available. Connect single-mode LC patch cables to the duplex LC ports, ensuring proper polarity and clean connectors to minimize insertion loss. Verify link status on the host device and configure the interface at 100 Gbps according to network requirements. Monitor optical parameters and system logs for proper operation after installation.

Recommendations

Use low-loss single-mode LC patch cords and maintain clean connector endfaces to ensure reliable LR4 performance. Confirm host compatibility with QSFP28 100G LR4 modules and consult equipment documentation for required firmware or configuration settings before deployment.