There are more ways to communicate than talking, and were I to hazard a guess, I would say the servers in AZ were communicating with the servers in Germany, since the Col was in the situation room. This would indicate that the servers that were not supposed to be connected to the internet were ... um ... connected to the internet.
And, interestingly enough it establishes that they were indeed communicating with the sized server in frankfurt.
Which will in the scotus case become very important.