Currently Being ModeratedFeb 23, 2013 5:51 AM (in response to email@example.com)
If you choose Flash On Activity from the Status Light pop-up menu (in the Base Station pane of AirPort settings in AirPort Utility), the status light will flash green to indicate normal activity.
From Apple's support document. I am not on a ML machine at the moment so I can't test this.
Currently Being ModeratedFeb 23, 2013 6:17 AM (in response to firstname.lastname@example.org)
AirPort Utility 6.2 does not provide this type of feature.
If you install AirPort Utility 5.6, you could use that version to set up the AirPorts to flash green on activity. AirPort Utility 5.6 was designed to run on the Lion operating system. You will need to use a workaround mentioned in the link below if you want to install AirPort Utility 5.6 on Mountain Lion, since Apple's installler will not allow you to do this.
This is not supported by Apple. It does work for me as well as others, but there is no way to predict whether it might work for you.
Currently Being ModeratedFeb 23, 2013 6:23 AM (in response to edex67)
When I open Airport Utility v6.2 on my MBA, I see a schematic diagram of the network but no "Airport Settings" choice. The AX symbol when selected has an "edit" button, which leads to a settings page with a base station pane, but no "status light pop-up menu". Am I using the correct Airport Utility?
Currently Being ModeratedFeb 23, 2013 6:58 AM (in response to email@example.com)
Bob Timmons is correct, unfortunately this doesn't appear on AU 6.2 which I have deleted from my Macs.