Electromechanics

Centrally. In one place. AND enough to put in a parallel special handset (you've seen them dozens of times in any electrician connection) to start listening to the line. Therefore, our valiant KGB absolutely no reason to install bugs in the phones of citizens - all can be done freely and calmly on the cross country! Long evenings on the switch, the author himself is so fond of playing around: he took the phone and went to the cross, to hear what people say. The surest way to determine what your conversation joined in this way: click on a call, or any noise after it. This method - the simplest and most affordable. Incidentally, all of Electromechanics, who work on the cross, once a year pass special courses in the FSB.

What do they teach there - I do not know, never got blurted. Surely something good! As you can see and hear a conversation on any wired telephone can any person connected with the work at ATS their friends, sympathizers and all those who for the occasion does not sting to put a case of beer on duty. As for cellular communication - then all is not so bad, talks in a digital form can be decoded only by using special equipment, which, of course, the Sotovik there. Moreover, usually such equipment is for testing and measurement of communication channels and inside there restrictions on the duration of the decoded conversation - the author has not seen that this duration exceeded two seconds.