Ubiquiti UACC-OM-QSFP28-LR4 QSFP28 transceiver that supports 100G

Ubiquiti UACC-OM-QSFP28-LR4 100G LR4 Single-Mode Optical Module

The Ubiquiti UACC-OM-QSFP28-LR4 is a QSFP28-form-factor optical transceiver module designed for 100 Gbps long-reach deployments over single-mode fiber infrastructure. This module supports point-to-point connections spanning up to 10 kilometers (6.2 miles), making it suitable for campus interconnects, data center uplinks, and carrier-grade network segments where extended distances are required without signal regeneration.

Overview

The UACC-OM-QSFP28-LR4 integrates into UniFi switching platforms and compatible QSFP28-equipped infrastructure to enable dense 100G optical connectivity. The module uses duplex LC UPC connectors, the industry standard for single-mode fiber deployments, ensuring compatibility with existing fiber plant installations. Operating across quad-wavelength technology (1295, 1300, 1304, and 1309 nm transmission and reception), this transceiver delivers deterministic, low-latency performance for mission-critical backbone and inter-switch links.

Key Features

• 100 Gbps Data Rate: Delivers full 100 Gigabit Ethernet throughput for high-bandwidth trunk and interconnect applications
• 10 km Single-Mode Fiber Support: Extended reach over single-mode fiber eliminates the distance constraints of multimode alternatives
• Duplex LC UPC Connectors: Standard connector type ensures seamless integration with existing fiber optic cable infrastructure and patch panel systems
• Quad-Wavelength Operation: Supports 1295, 1300, 1304, and 1309 nm wavelengths for TX and RX, enabling flexible optical network design
• Low Power Consumption: Maximum power draw of 4 watts minimizes thermal load in densely populated switch chassis
• Wide Operating Temperature Range: Rated 0 to 70°C (32 to 158°F) ambient temperature tolerance supports both climate-controlled data centers and field deployments
• QSFP28 Form Factor: Compact module design allows multiple transceiver installations within a single switch chassis for scalable 100G port expansion
• Class 1 Laser Compliant: Meets IEC/EN 60825-1:2014 safety certification standards

Integration & Compatibility

The UACC-OM-QSFP28-LR4 (often searched as UACC OM QSFP28 LR4) is compatible with UniFi switching products equipped with QSFP28 optical ports. Installation requires single-mode fiber infrastructure terminated with LC UPC connectors on both ends of the optical link. Technicians must observe Class 1 laser safety protocols during installation and troubleshooting—do not look into the fiber ends or module apertures while power is applied.

When planning deployment, verify that your existing fiber plant supports single-mode cabling and that patch panels, jumpers, and termination hardware are rated for LC UPC connectors. Integration into existing monitoring systems and network management platforms follows standard QSFP28 MIB conventions through the host switch's management interface.

Ted Perry

I evaluated the UACC-OM-QSFP28-LR4 during a campus backbone redesign project. This module delivers solid 100G performance over 10 km of single-mode fiber—exactly what we needed to connect geographically dispersed buildings without intermediate regeneration points. The quad-wavelength design and standard LC UPC connectors meant we could leverage existing fiber runs and patch infrastructure with minimal rework.

Technical Highlights:

• Extended Reach: 10 km single-mode capability eliminates the 400-meter multimode constraint, enabling true campus-scale optical interconnects
• Power Efficiency: 4-watt maximum consumption is negligible even in high-density port configurations, simplifying power provisioning in switch chassis
• Thermal Margin: 0–70°C operating range accommodates both indoor data center and outdoor equipment enclosure environments

Deployment Considerations:

• Verify fiber termination quality at LC UPC connectors—dirty or misaligned ferrules degrade link performance and introduce intermittent errors
• Use single-mode fiber rated for the specific wavelengths (1295–1309 nm) to avoid chromatic dispersion issues over the 10 km span
• Implement optical power monitoring within the host switch's management system to catch signal degradation early

For integrators and IT managers deploying 100G backbone capacity across campuses or metropolitan networks, the UACC-OM-QSFP28-LR4 is a reliable, proven choice that integrates seamlessly into Ubiquiti infrastructure without proprietary surprises or compatibility headaches.