User's Manual
1
Chapter 1: OverviewairFiber X User Guide
Ubiquiti Networks, Inc.
airFiber Configuration Interface 
SystemRequirements
•  Microsoft Windows 7, Windows 8; Linux; or Mac OS X
•  Java Runtime Environment 1.6 (or above)
•  Web Browser: Mozilla Firefox, Apple Safari, 
GoogleChrome, Microsoft Edge, or Microsoft Internet 
Explorer11
Hardware Overview
Port Cover
LED 
Panel
Connects to 
External GPS 
Antenna
Chain 0: 
Connects to 
+45° on 
airFiber Antenna
Chain 1: 
Connects to 
-45° on 
airFiber Antenna
Chapter 1: Overview
Introduction
Thank you for purchasing the Ubiquiti Networks® 
airFiber® X Carrier Backhaul Radio. This User Guide is for 
use with the following models:
Model Description Operating Frequency*
AF-2X 2.4 GHz Carrier Backhaul Radio 2400 - 2500 MHz
AF-3X 3 GHz Carrier Backhaul Radio 3300 - 3900 MHz
AF-4X 4 GHz Carrier Backhaul Radio 4940-4990 MHz
AF-5X 5 GHz Carrier Backhaul Radio 5150 - 5925 MHz
* Depends on Regulatory Region. Refer to “Specifications” 
on page 41 for more information.
This User Guide provides installation instructions, explains 
how to set up an airFiber link, and shows how to access 
and use the airFiber Configuration Interface. 
Note: Throughout this User Guide, airFiberX radio 
refers to all models listed above. Unless noted 
otherwise, illustrations for a specific model are 
applicable to all airFiberX radio models and 
accessories.
Package Contents
airFiber AF-2X, AF-3X, 
AF-4X, or AF-5X
GPS Antenna Mount  External GPS Antenna
Metal Strap Cable Ties 
(Qty. 2)
Universal Bracket 
(AF-4X and AF-5X only)
5 
GHz Carrier 
Backhaul Radio
Model: AF-5X
DATA
MGMT
GPS
LINK
DATA
MGMT
GPS
LINK
airFiber PoE (24V, 1A) 
with Mounting Bracket
Power Cord Quick Start Guide
TERMS OF USE: Ubiquiti radio devices must be professionally installed. Shielded Ethernet cable and 
earth grounding must be used as conditions of product warranty. TOUGHCable
™
 is designed for 
outdoor installations. It is the customer’s responsibility to follow local country regulations, including 
operation within legal frequency channels, output power, and Dynamic Frequency Selection (DFS) 
requirements.










