Ubiquiti UACC-UPLINK-SFP28-0.15M 25G Direct Attach SFP28 Cable
Overview
The Ubiquiti UACC-UPLINK-SFP28-0.15M is a 0.15-meter (5.9-inch) direct attach cable (DAC) with SFP28 connectors on both ends. This cable delivers 25GBase connectivity between Ubiquiti UniFi switching hardware and compatible network appliances without the complexity of transceivers or fiber modules. The short-reach design eliminates unnecessary cable plant overhead in equipment rooms and edge deployments where equipment sits within arm's reach.
Key Features
- Multi-speed support: Operates at 1G (1GBase-SX/LX), 10G (10GBase-SR/LR), or 25G (25GBase) speeds with automatic link negotiation — no need to stock separate cables for different speed tiers. This flexibility reduces spare-parts inventory overhead in environments where port speeds may vary across hardware generations.
- SFP28 connectors: Dual SFP28 ports enable direct socket-to-socket connections on compatible UniFi infrastructure without transceivers. Fewer components mean fewer failure points and simpler field troubleshooting.
- 0.15-meter length: At 5.9 inches, this cable is purpose-built for short-distance uplink connections — between stacked switches, from a switch to a gateway appliance, or within confined cabinet spaces. Longer runs (10m+) should use fiber or active optics instead.
- Auto link optimization: The cable integrates auto-negotiation logic so it discovers and locks to the highest supported speed automatically. You don't have to manually set link speed; the system handles it during boot.
- White connector design: Matches standard UniFi aesthetic and packaging conventions, making cable identification and integration straightforward in uniformly deployed environments.
- Reduced cable plant complexity: DACs eliminate the need for separate SFP28 transceiver modules, power consumption from active optics, and the operational overhead of module inventory. For equipment-room uplinks, this translates to simpler sparing and faster provisioning.
Integration & Compatibility
The UACC-UPLINK-SFP28-0.15M is designed specifically for Ubiquiti UniFi network equipment with SFP28 ports. Compatibility extends to any switch, gateway, or appliance (UniFi or third-party) that implements standard SFP28 slots and auto-negotiation. The cable is passive, meaning no firmware or driver configuration is required — insert and link comes up.
If you are planning a multi-switch network refresh or uplink consolidation, verify that all target ports support SFP28. Older equipment may feature SFP+ (10G only) slots, which are physically incompatible with SFP28 connectors.
When to Choose a Different Accessory
If your uplink distance exceeds 10 meters, transition to multi-mode or single-mode fiber with appropriate optics — DACs are not rated for long-haul distances and will not function reliably beyond roughly 7–10 meters depending on signal integrity. For extremely short-distance cabinet connections (under 1 meter), consider evaluating whether a shorter unshielded twisted-pair Ethernet cable might reduce footprint further, though DACs offer superior signal integrity for 25G.
Frequently Asked Questions
Q: Will the UACC-UPLINK-SFP28-0.15M work with SFP+ (10G) ports?
A: No. SFP28 connectors are physically larger and have different pin layouts than SFP+ (10G) connectors. The cable will not physically mate with SFP+ slots. Verify all target ports are SFP28 before ordering.
Q: Do I need to configure link speed, or does it auto-negotiate?
A: The cable supports auto-negotiation. Once inserted into both SFP28 ports, the endpoints automatically discover and lock to the highest mutually supported speed (1G, 10G, or 25G). No manual configuration required.
Q: What is the maximum distance this cable supports?
A: Direct attach cables are short-reach interconnects, typically rated up to 10 meters under optimal conditions. The UACC-UPLINK-SFP28-0.15M is engineered for cabinet and equipment-room distances (under 2 meters ideally). For longer uplinks, deploy active optics or fiber with appropriate transceivers.
Q: Is this cable passive (no power) or active?
A: The UACC-UPLINK-SFP28-0.15M is a passive direct attach cable. It requires no power supply, firmware, or active components. Simply insert into both SFP28 ports and link establishes immediately.
Q: Can I use this cable with non-Ubiquiti equipment?
A: Yes, provided the equipment has standard SFP28 ports and supports 25GBase, 10GBase, or 1GBase auto-negotiation. The cable is standards-compliant and will work with any SFP28-equipped switch or appliance. However, UniFi-specific features (link optimization, monitoring integrations) may not be available on third-party hardware.
Q: What warranty or support is provided?
A: Consult the original Ubiquiti product documentation or your specialty distributor for warranty terms. Passive cables typically carry limited warranty (often 1 year); check the purchase receipt or Ubiquiti support portal for details specific to this part number.
