User's Manual
2
Chapter 1: Overview airFiber X User Guide
Ubiquiti Networks, Inc.
Ports
Reset 
Button
Management 
Port
Data 
Port
Management Port  10/100 Mbps, secured Ethernet 
port for configuration. In-Band Management is enabled 
by default in the airFiber Configuration Interface. When 
In-Band Management is disabled, the MGMT port is the 
only port that can monitor, configure, and/or update 
firmware.
Reset Button  To reset to factory defaults, press and hold 
the Reset button for more than 10 seconds while the 
device is already poweredon.
Data Port  Gigabit PoE port for handling all user traffic 
and powering the device.
LEDs
Signal LEDs
Signal 4  LED will light blue when on.
Signal 3  LED will light green when on.
Signal 2  LED will light yellow when on.
Signal 1  LED will light red when on.
Bootup to airOS  When powering on, the Power, GPS, 
LINK, and Signal 1-4 LEDs light on. Once the CPU code 
takes over, the GPS, LINK, and Signal 1-3 LEDs turn off. 
Signal 4 LED remains on to indicate the boot sequence is 
underway.
Initializing airFiber Software  When the airFiber 
application begins to boot under airOS, the Signal 4 LED 
goes from solidly on to a 2.5 Hz flash. This continues until 
the airFiberX radio is fully booted.
Signal Level  Once fully booted, the Signal 1-4 LEDs act 
as a bar graph showing how close the airFiberX radio 
is to ideal aiming. This is auto-scaled based on the link 
range, the antenna gains, and the configured TX power 
of the remote airFiberX radio. Each Signal LED has three 
possible states: On, Flashing, and Off. All Signal LEDs would 
be solidly on in an ideal link. If the link has a 1 dB loss, the 
Signal4 LED will flash; a 2 dB loss and the Signal 4 LED will 
turn off. The full bar graph LED states are shown below.
dB 
loss
0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13
1 F 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 F 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 F F 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 F F F 0
0 = Off, 1 = On, F = Flashing
Additional LEDs
LED State Status
LINK
Off RF Off
Short Flash* Syncing
Normal Flash* Beaconing
Long Flash* Registering
On Operational
GPS
Off No GPS Synchronization
Normal Flash* Non-Operational (Weak Signal) 
On Operational (Strong Signal)
MGMT
Off No Ethernet Link
On Ethernet Link Established
Random Flashing Ethernet Activity
DATA
Off No Ethernet Link
On Ethernet Link Established
Random Flashing Ethernet Activity
Off No Power
On Powered On
* Short Flash (1:3 on/off cycle) 
Normal Flash (1:1 on/off cycle) 
Long Flash (3:1 on/off cycle)










