According to reports, the Wednesday outage of service of the Internet telephony giant, Skype, affected millions of users who could not make calls using the service. As per the company, the outage resulted from some problem in the peer-to-peer interconnection system.

In an explanation about the problem, an official Skype blog post said that the company’s network makes use of something known as “supernodes” which essentially serve as directories for finding users online. On Wednesday, several of these “supernodes” were apparently taken offline due to a glitch affecting some versions of the Skype software.

Soon after the outage was reported, Skype also tweeted on its Twitter feed that it was looking into the problem; and that some users may likely have trouble signing in to its service till the issue is resolved.

Noting that Skype’s operations chiefly rely on the connections between users’ computers and telephones, head blogger Peter Parkes said in the blog post: “As Skype relies on being able to maintain contact with supernodes, it may appear offline for some of you.”

Parkes further added that since Skype was in the process of building “mega-supernodes” to fix the malfunction, it may take a few hours for the service to return, and even longer before some features – like group video calling – become fully functional again.