Hi all!
I dont know the meaning of the second led from right of the CRS305-1G-4S+.
It seems always off so I cannot understand its function.
Can you help me??
Thank you in advance
Best Regards from Rome 
Andrea
It is the user led..
https://wiki.mikrotik.com/wiki/Manual:System/LEDS
Hi Zacharias,
thank you for your quick reply
The user led on my device is always off.
I thought it lights on when there is an activity on user interface either web or terminal, but after I tried it does not ever on.
Is this “only” a “programmable” led without default behavior??
The manual page you linked does not report any specific function but “interface-activity” and “show current CAP status” but doen not explain if there is an “embedded” default function.
Thank you for your patience and sorry for my english.
Andrea
You will see the user led light on a restart for example…
Also it’s used as a guide for some reset functions, netinstall etc https://wiki.mikrotik.com/wiki/Manual:Reset
And yes you can programm it as well
Hi!
You have been very clear and comprehensive.
Thank you!
Andrea