That's where you're wrong, Sir. I'm a Transmission Engineer and have taught engineering design of the outside plant to Outside Plant Engineers and Telephone Technicians how to use their meter to identify and locate troubles since July 27, 1997. I've been in the industry since 1984.
I'm not wrong. Signals are useless without something to modulate them and demodulate them. Tell me... what device do you have in your computer right now that can modulate a usable signal across a DC current (that only flows in one direction mind you)... back to your AC/DC converter (power supply), and then re-transmit that signal on an AC current where it can be demodulated by those covert NSA folks you worry about?
So, you're telling me the components in a computer do not use signals between components to tell it what to do? You know what binary code is right? Binary code is transmitted within components in a computer in the form of voltage for a "1" and no voltage for a "0." Frequencies represent PACKAGES of "1's" and "0's" in ADSL.
CAN'T DC CURRENT BE SWITCHED ON FOR A DAMN ONE (1) AND OFF FOR A DAMN ZERO (0)?
YES, IT CAN. It's called PULSATING DC.
Again, JUST STOP MAKING A DAMN FOOL OF YOURSELF.
As for explaining the other stuff to you, that will cost you and the ZEN TEAM SOME DAMN MONEY.