Can you explain why ISP's are so lazy when you report a circuit down? Same standard thing from them. " Can you verify power to the site". Fuck you douche bag My trace cut off on your network before I hit the public wan address.
if you have access to your edge device (router most prolly)
1) always check layer 2 > if your interface is up/down and they(ISP) r not providing clocking its THEIR fault....just say " my layer 2 is down and i got no clocking"
2) in the case you r using PPP over the link > debug ppp authentication and see if there is an authentication faliure..tell them this (passwd mismatch etc)
3) in case you r also using frame-relay (and or PPP over frame) check LMI status....if u dont have LMIs its again their problem...if you r getting LMIs then check your PVC and see if they r active... (show frame pvc)
if, when you call you are specific about your issue they will respect you more and pay attention to what you have to say
hope this helps