Router Query

[#1]

I have a Voyager 210 router which is about 14 months old.
On odd occasions I can't connect to the internet and when I look at the router the internet light is out.  I turn the router off for 5 minutes and then all is well when I switch back on again.
This has happened 3 times in the past week.  Is this a problem with the router or simply something random that I can ignore?

[#2]

You wont know for sure until it stops happening or get worse. Turing it off would reset it and drop the line at the exchange so either of these could be the cause let us know how you get on

[#3]

Thanks Samuria.  It's not too much of a problem at present so I'll leave it alone.  One further question.  If the problem is at the exchange would the router reset itself when the exchange reset?