just got myself a VIP5 and so far the everything works fine. download max @ 600kb/s from megaupload as free user but sometimes i think TM throttled it until 290kb/s. Speedtest gave me 4.99Mb/s download and 4.53Mb/s upload. crossing my fingers that all this won't give my any issue in the future

i install my unifi vip5 about 1 month+ ago and currently using their Dlink DIR-615 latest f/w. recently i encounter a orange blinking light on the side of the modem. it is actually a button too and when i try press it then it blinking became from orange color to blue color. it is like 1 sec interval blinking. anyone encounter this? i try look into their manual but never show or explain what is this button/function for. the user manual only show front and rear but never explain the side one.

ic... thanks for the explanation.. user manual never mention about this button at all.
is it normal that keep on blinking in orange color? and then after i press it then become blue color?
i remember it never blink before