"AT&T equipped a "secret room" at 611 Folsom Street in San Francisco to track domestic and international phone calls made by American citizens and others."
https://www.zdnet.com/article/these-photos-illustrate-at-ts-phone-internet-tracking-activities-for-nsa/
A whistleblower took a picture of the room. It was numbered 641A.
There is no Q clearance. Read Q's subsequent post on the topic.
I held a TS/SCI as a pilot because I had to know highly classified info about our capabilities and weapon systems and was also read into intelligence on other countries, which if compromised could reveal collection sources/methods. There were definitely higher levels above what I had.
Whatever it is, it has nothing to do with military intelligence, which is what Q is. Never heard anything about a "Q" clearance in all my time as an officer the military.