Ubiquiti UACC-UPLINK-SFP28-3M 25GBase Direct Attach Cable
Overview
The UACC-UPLINK-SFP28-3M is a 3-meter direct attach copper cable engineered for 25GBase interconnection in UniFi infrastructure. It terminates in SFP28 connectors on both ends and eliminates the need for transceiver modules — a cost and complexity reduction when deploying high-speed uplinks between UniFi switches, gateways, and modular network equipment.
Key Features
- 25GBase native speed: Supports line-rate 25G SFP28 links without negotiation overhead. If you need to future-proof a switch fabric for high-throughput applications (multi-camera NVR clusters, warehouse automation networks, or encrypted traffic scaling), 25G eliminates the bottleneck that 10G uplinks create as camera density increases.
- Backward-compatible speed negotiation: Auto-detects and supports 25G SFP28, 10G SFP+, and 1G SFP modules on each end. Useful in mixed-generation deployments where you're migrating older 1G or 10G modules into 25G-capable infrastructure without hardware replacement.
- Direct attach (DAC) design: No separate SFP28 or SFP+ transceiver modules required. Eliminates per-link transceiver costs (typically $50–200 per module pair) and removes a layer of potential compatibility failure.
- 3-meter cable length: Adequate for most switch-to-switch or switch-to-modular-device uplinks within a rack or between adjacent equipment. Verify rack layout before purchase — if your devices are farther apart, this length may be insufficient and you'll need optical DAC or fiber modules.
- Plug-and-play integration: Direct attach copper cables work immediately upon physical insertion into compatible SFP28 ports. No firmware configuration, no module pairing, no driver installation — physical connection equals active link.
- UniFi ecosystem fit: Designed for UniFi switches and gateways featuring SFP28 uplink ports. Confirm your target device has SFP28 or backward-compatible SFP ports before ordering.
Integration & Compatibility
The UACC-UPLINK-SFP28-3M integrates directly into UniFi infrastructure where SFP-based uplinks are required. It is compatible with UniFi switches, gateways, and modular equipment equipped with SFP28 or SFP ports. No additional modules, firmware updates, or licensing are needed for deployment.
When to Choose a Different Option
If your uplink distance exceeds 3 meters or spans between separate buildings, optical DAC or fiber-optic modules are necessary — direct attach copper cables degrade rapidly beyond 5–7 meters. If your switch infrastructure is older or does not include SFP28 ports, standard Ethernet uplinks or 10G SFP+ modules may be more cost-effective.
Frequently Asked Questions
Q: What is the difference between 25GBase DAC and 10G SFP+ DAC cables?
A: The UACC-UPLINK-SFP28-3M supports 25G speed natively via SFP28 connectors. 10G SFP+ DACs use smaller SFP+ connectors and cannot exceed 10 Gbps. If your switch supports both, 25G provides 2.5x the bandwidth but the SFP28 cable is physically incompatible with SFP+ ports.
Q: Can I use the UACC-UPLINK-SFP28-3M with non-UniFi equipment?
A: The cable itself is a passive direct attach component and is technically vendor-agnostic, but compatibility depends entirely on whether your target device has SFP28 or backward-compatible SFP ports. Verify your switch or gateway supports SFP28 before purchase. UniFi equipment is optimized for this cable, but other brands with SFP28 may work.
Q: Does the UACC-UPLINK-SFP28-3M require any configuration?
A: No. Direct attach cables are passive copper lines — no firmware, software, or manual link negotiation is required. Insert both ends into compatible SFP28 or SFP ports and the link activates immediately.
Q: What is the maximum distance this cable supports?
A: Direct attach copper is rated for up to 3 meters per this product. Beyond 5–7 meters, signal integrity degrades significantly. For distances greater than 3 meters, use optical DAC or fiber-optic modules with your switch infrastructure.
Q: Is the UACC-UPLINK-SFP28-3M compatible with 1G or 10G equipment?
A: Yes, this cable supports backward compatibility with 10G SFP+ and 1G SFP modules via auto-negotiation. Both ends detect the module type and link at the appropriate speed. Useful when migrating equipment across generations.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The UACC-UPLINK-SFP28-3M is a straightforward passive cable for high-speed switch uplinks in UniFi environments. At 25GBase native speed, this 3-meter DAC eliminates transceiver module costs and simplifies inventory. Direct attach copper means zero configuration — link is active the moment you seat both SFP28 connectors.
Technical Highlights:
- 25GBase throughput: Full line-rate 25 Gbps means no bandwidth throttling when aggregating multi-camera NVR traffic or warehouse automation sensor data across UniFi switches.
- Backward-compatible auto-negotiation: Plugging into 10G SFP+ or 1G SFP ports automatically drops speed; no manual intervention or port reconfiguration needed during mixed-generation migrations.
- Passive DAC elimination of transceiver cost: Removing SFP28 modules from the equation saves roughly $100–150 per uplink pair versus active optical modules, a real savings in multi-switch fabrics.
Deployment Considerations:
- 3-meter length is a hard limit — this cable does not extend beyond typical rack-to-rack or chassis-mounted distances. Measure your switch spacing before committing.
- Direct attach copper is ambient-temperature sensitive; excessive heat or outdoor routing will degrade signal integrity faster than fiber. Keep runs indoors and away from heat sources.
- Verify target device SFP28 port support; older UniFi switches or third-party equipment may lack SFP28 ports entirely, making this cable useless on those boxes.
The UACC-UPLINK-SFP28-3M is purpose-built for UniFi switch-to-switch or switch-to-gateway uplinks where distance is short (under 3 meters), rack density is high, and 25G throughput matters. Skip it if you need longer spans or non-UniFi hardware compatibility.
