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menuUSW-48-POE Quick Start Guide

Package Contents

UniFi Switch
Rack-Mount Brackets (Qty. 2)
Bracket Screws (Qty. 8)
Mounting Screws (Qty. 4)
Cage Nuts (Qty. 4)
Power Cord

System Requirements

IMPORTANT: We strongly recommend using UPS backup and power regulation to prevent equipment damage due to stability issues with local AC power.

Hardware Overview


Touchscreen Display

Bootup Animation


Steady White

Factory defaults, waiting for adoption.

Steady Blue

Successfully adopted by a network and working properly.

Location Animation

This indicates that you clicked Locate in the UniFi Controller software. The software will also display the location of the device on the map.

RJ45 PoE LED (Ports 1 - 32)


No PoE


802.3af/at PoE

RJ45 Speed/Link/Activity LED (Ports 1 - 48)


No Link


Link Established at 10/100 Mbps

Flashing Indicates Activity


Link Established at 1000 Mbps

Flashing Indicates Activity

SFP Speed/Link/Activity LED (Ports 49 - 52)


No Link


Link Established at 1 Gbps

Flashing Indicates Activity

RJ45 (Ports 1 - 32)

RJ45 ports support 10/100/1000 Ethernet connections and 802.3af/at PoE output.

RJ45 (Ports 33 - 48)

RJ45 ports support 10/100/1000 Ethernet connections.

SFP (Ports 49 - 52)

Hot-swappable SFP ports support 1 Gbps connections.

Reset Button

This button serves two functions for the UniFi Switch:

  • Restart Press and release the Reset button quickly.
  • Restore to Factory Default Settings Press and hold the Reset button for more than five seconds.

Power Port

Connect the included Power Cord to the Power port.

Installation Requirements

Hardware Installation

IMPORTANT: Fanless switches must not be stacked. Do not place this UniFi Switch on top of another switch. Do not place anything on top of this UniFi Switch.

  1. OR

Connecting Power

Connecting Ethernet

Note: If you are connecting PoE devices, check the display to see how much PoE wattage is available.

Connecting SFP

For information about compatible fiber SFP modules, visit: ubnt.link/UniFi_SFP_DAC_Compatibility

Software Installation

Download and install the latest version of the UniFi Controller software at ui.com/download/unifi and follow the on-screen instructions.

Note: If you already have UniFi Controller v5.12.x or newer installed, skip to “Adopting the UniFi Switch”.

After you have installed the software and run the UniFi Installation Wizard, a login screen will appear for the UniFi Controller management interface. Enter the admin name and password that you created and click Sign In.

You can manage your network and view network statistics using the UniFi Controller management interface.

To adopt the UniFi Switch, proceed to “Adopting the UniFi Switch”.

For information on configuring and using the UniFi Controller software, refer to the User Guide on the website: ui.com/download/unifi

Adopting the UniFi Switch

  1. From the UniFi Controller dashboard, click Devices in the left menu bar.

  2. On the Devices screen, locate the UniFi Switch in the list of devices under the Model column. To adopt the UniFi Switch, click Adopt.

  3. The display will turn blue to confirm that it has been successfully adopted.




442.4 x 285 x 43.7 mm
(17.42 x 11.22 x 1.72")


4.52 kg (9.97 lb)

With Rackmount Brackets4.61 kg (10.16 lb)


Networking(48) 10/100/1000 RJ45 Ports
(4) 1G SFP Ethernet Ports
ManagementEthernet In-Band

Power Method

100-240VAC, 50/60 Hz, Universal Input

Power Supply

AC/DC, Internal, 240W

Supported Voltage Range

100 to 240VAC

Max. Power Consumption
(Excluding PoE Output)



RJ45 Data PortsPoE; Speed/Link/Activity
SFP Data PortsLink/Activity

ESD/EMP Protection

Air: ± 16 kV, Contact: ± 12 kV

Shock and Vibration

ETSI300-019-1.4 Standard

Operating Temperature

-5 to 40° C (23 to 104° F)

Operating Humidity

10 to 90% Noncondensing




PoE Interfaces

Ports 1-32POE+ IEEE 802.3af/at
(Pins 1, 2+; 3, 6-)

Max. PoE Wattage per Port by PSE


Voltage Range 802.3af Mode


Voltage Range 802.3at Mode