Ubiquiti UACC-OM-QSFP28-LR4 QSFP28 100Gbps Optical Transceiver
The Ubiquiti UACC-OM-QSFP28-LR4 is a QSFP28 optical transceiver engineered for high-speed enterprise and data center network deployments where extended link distances are non-negotiable. This module delivers 100 Gbps aggregate throughput, enabling you to consolidate bandwidth across campus networks and distributed warehouse automation infrastructure without chaining multiple lower-speed circuits.
Key Features
- 100 Gbps throughput: Full-duplex performance means you're not splitting bandwidth between upload and download — critical when synchronizing multi-site inventory systems or real-time video feeds across geographically dispersed facilities.
- LR4 long-reach configuration: Extended transmission distance over single-mode fiber eliminates the cost and complexity of intermediate repeaters or shorter-reach transceiver chains — a meaningful factor when campus links exceed standard short-reach budgets.
- 4W maximum power consumption: Operates within tight power envelopes typical of modular switching platforms. This low thermal footprint reduces cooling overhead in enclosed network closets and avoids cascading power budget strain across your infrastructure.
- 0 to 70°C operating temperature range: Suitable for indoor data center and enterprise switch environments; if your network closet routinely exceeds 70°C or you need to deploy transceiver-dependent equipment outdoors, verify cooling provisioning or consider active management during commissioning.
- QSFP28 hot-pluggable form factor: Installs directly into compatible modular slots on Ubiquiti networking equipment — EdgeMax and UniFi platforms with QSFP28 module support. No dedicated external hardware required; module swaps are non-disruptive during maintenance windows.
- Optical interface compatibility: Works with standard single-mode fiber infrastructure, so you can integrate with existing campus backbone or data center fabric without re-cabling — provided your fiber plant is already deployed or budgeted.
Integration and Compatibility
The UACC-OM-QSFP28-LR4 integrates into Ubiquiti switches and routers equipped with QSFP28 module slots. Confirm your target platform (model number) supports QSFP28 before ordering — not all EdgeMax or UniFi devices feature these ports. Once installed, the transceiver is managed through the host device's standard web UI or CLI; no separate management interface is required.
Fiber connectivity relies on standard LC duplex connectors. Ensure your single-mode fiber plant is rated for the LR4 wavelength (typically 1295–1310 nm) and that link distances fall within manufacturer specifications. If you are unsure of your fiber infrastructure specs, consult your network architect or network infrastructure guide before committing.
Deployment Considerations
The UACC-OM-QSFP28-LR4 is a carrier-class transceiver. Installation requires familiarity with fiber optic handling — improper connector cleaning or insertion can degrade performance or cause intermittent link flaps. If your team lacks fiber certification or experience, budget for on-site commissioning support.
Long-reach transceivers are optimized for distance, not short-reach performance. If your link is under 2 km, you may be over-specifying; check whether a standard SR4 transceiver from the same vendor would reduce cost without sacrificing performance.
Frequently Asked Questions
Q: What fiber type does the UACC-OM-QSFP28-LR4 require?
A: Single-mode fiber (SMF-28 or equivalent). Multi-mode fiber will result in excessive attenuation and link loss.
Q: Can I mix UACC-OM-QSFP28-LR4 transceivers with other brands on the same fiber link?
A: Not recommended without rigorous testing. Optical parameters (power levels, extinction ratios, jitter) vary across vendors. Ubiquiti transceivers are validated for use within Ubiquiti switching platforms.
Q: What is the maximum link distance for the LR4?
A: Consult the datasheet for exact specifications. LR4 is designed for extended reach (typically 10 km or greater), but actual distance depends on fiber plant quality, connector losses, and installation practices.
Q: Does the UACC-OM-QSFP28-LR4 require external power?
A: No. Power is drawn from the host device's QSFP28 module slot (maximum 4W). No additional power supply or cabling is needed.
Q: Is this transceiver hot-swappable?
A: Yes. The QSFP28 form factor is hot-pluggable, meaning you can insert or remove it without powering down the host device. However, link traffic will be interrupted during the swap.
Q: Which Ubiquiti platforms support QSFP28 modules?
A: QSFP28 support varies by model. EdgeMax switches and routers with modular line-card support typically include QSFP28 slots. Verify your specific hardware documentation before purchasing.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The UACC-OM-QSFP28-LR4 is a straightforward, carrier-grade optical transceiver — no surprises here, and that's the point. If you're building a data center fabric or multi-building campus network and your Ubiquiti switch has QSFP28 slots, this module handles the long-haul heavy lifting without the thermal or power bloat you'd see in alternative transport options.
Technical Highlights:
- 100 Gbps unidirectional per direction: Full duplex over single fiber pair. Compared to bonded 25G or 50G circuits, this eliminates interface sprawl and the operational complexity of managing multiple lower-speed transceiver pairs.
- 4W power envelope: Draws minimal current from the host module slot, meaning your EdgeMax or UniFi platform's power budget stays loose even with multiple transceivers installed. No thermal fan ramp-up required in most closets.
- LR4 reach over SMF-28: Designed for distances that would exhaust SR4 specifications. If your campus backbone or data center inter-connect exceeds 2 km, LR4 avoids the cost and delay of intermediate regeneration.
Deployment Considerations:
- Fiber plant quality matters. Dirty connectors, poor splicing, or marginal fiber can kill link margin. If your SMF-28 plant is aged or untested, budget for link characterization (OTDR sweep) before going live.
- Ubiquiti transceiver validation is vendor-specific. Mixing brands on the same switch is technically possible but unsupported; if you need multi-vendor interop, verify with both vendors first — don't discover compatibility issues during go-live.
Deploy the UACC-OM-QSFP28-LR4 when you're scaling a geographically distributed surveillance or warehouse automation network and need to consolidate uplinks without reshuffling your fiber plant or adding external optical gear. It's a no-fuss module for teams with existing Ubiquiti infrastructure and reasonable fiber hygiene discipline.
