Fiber Optic Transceiver CBO QSFP28-100G-LR4 100G LR4 single‑mode for 10 km

CBO QSFP28-100G-LR4 is a QSFP28 form-factor fiber optic transceiver designed to deliver 100 Gigabit Ethernet over single-mode fiber for long-reach links up to 10 km. The module aggregates four 25 Gbps lanes into a compact hot-pluggable package compatible with QSFP28 ports, enabling high-bandwidth connectivity for switches, routers and optical line systems. It supports LR4 wavelengths and is intended for backbone, data center interconnect and carrier applications where reliable 100G links are required.

Advantages

The transceiver provides high-density 100G connectivity in a small QSFP28 module, reducing space requirements in network racks and line cards. Hot-pluggable design allows easy installation and replacement without powering down equipment. Operating over single-mode fiber and LR4 wavelength channels makes it suitable for long-reach links up to 10 km, maintaining signal integrity and low error rates. Compatibility with standard QSFP28 ports and four independent 25 Gbps lanes offers flexibility for various network architectures.

Suitable for

• Data center interconnects between buildings or halls up to 10 km apart
• High-speed backbone links in campus and metropolitan networks
• Carrier and service provider aggregation and core links
• Upgrading switches and routers to 100G capacity without major hardware changes

Key specifications

• Form factor: QSFP28 (hot-pluggable)
• Data rate: 100 Gigabit Ethernet (4 × 25 Gbps lanes)
• Fiber type: single-mode fiber
• Reach: up to 10 km over single-mode fiber
• Transmission format: LR4 wavelengths (4-lane CWDM)
• Connector type: duplex LC (optical)
• Power consumption: typical module-level power consistent with QSFP28 class
• Operating environment: standard commercial temperature range

How to use

Install the QSFP28 module into a compatible QSFP28 port on a switch, router or optical transceiver card while the device is powered according to the equipment vendor's hot-swap procedures. Connect single-mode fiber with LC duplex connectors, ensuring correct polarity and clean end faces. After insertion, verify link status through the host device’s management interface and confirm signal parameters and error counters. Follow equipment and fiber management best practices when routing and securing the cable.

Recommendations

For reliable long-reach operation, use ITU-compliant single-mode fiber with appropriate optical loss budget, perform connector cleaning before mating, and monitor link health via the host device. Match fiber type and transceiver specifications at both ends, and consult switch/router documentation for SFP/QSFP port settings and firmware compatibility.