Alvarion BREEZEACCESS SW VERSION 5.1 - Manual (Page 85)

Installing the Universal IDU Indoor Unit
Installation
53
NOTE
The length of the Ethernet cable connecting the indoor unit to the user's equipment, together with
the length of the Indoor-to-Outdoor cable, should not exceed 100 meters.
2.4.1 RESET Button Functionality
Using a sharp object, press the recessed RESET button for a short time to reset
the unit and reboot from the Main version.
In units with ODU HW revision C and higher, the RESET button can be used for
setting the unit to its factory defaults. Press the button for at least 5 seconds
(until the ETH LED of the IDU stops blinking): the unit will reboot with the
factory default configuration.