I’m just wondering if it would somehow be possible to use one of the LED’s on a routerboard RB493G to make an “internet” led? Essentially something that goes out and pings or otherwise tests connectivity to something or another out on the internet (ping google or whatever) and lights up the LED if that check is successful or extinguishes the LED if it can’t access.
I’ve got a couple of places that have field offices with bad internet connections (pppoe session will fail to reconnect or will just stop transferring data). The users on those sites are not particularly computer literate so it’s always a drawn out process to talk them through the initial troubleshooting. I’m figuring if I can just say “is the internet light on” that potentially cuts the length of the phonecall in half right there. 
Cheers,
Mike