Skype is down

Down for me for at least last 6 hours. Text chat is going through but calls are not.

From Wikipedia:

"Skype originally featured a hybrid peer-to-peer and client–server system; however, since May 2012, Skype is entirely powered by Microsoft-operated supernodes. The 2013 mass surveillance disclosures revealed that Microsoft has granted intelligence agencies unfettered access to supernodes and Skype communication content."

Can anyone spot where they went wrong?