posted on Jun, 13 2013 @ 04:49 PM
Originally posted by Heliophant
This has been bugging me actually.
The question is "What is CALEA for? Alex. I'll take 4ESS network switch trivia for 100."
You don't have to physically tap any wireline or cell phone in the US, unless you're the local LEOs.
All the NSA has to do is instruct the switch that handles the landline (or the cell system if it's a cell phone) to make you a copy of the traffic and
send it to a monitoring phone. When a call originates or terminates at that subscriber, the system calls you on the phone and connects you to the
audio stream. The caller ID shows the other end's number, coming or going. There are no clicks, pops, or tapping sounds on the monitored line. They
can't hear what you say. You can hit a star combination to cut the call off or to cut in.
This could be done before CALEA but now it's way easier because it's more standardized.
eta: All that to say, yes yes it can be done, and he knows this, too. Before CALEA it required time to set up because it took a phone network guy to
manually program the person of interest's 4ESS. Now it's a canned bit of software. Before THAT you could listen in on phone calls using the
verification network, that, too didn't leave any obvious sounds, impedance changes or whatnot but was even MORE manually intensive and had to be done
on a call by call basis.
More NSA wise, ECHELON can be instructed to take care of this for you for a person of interest.
edit on 13-6-2013 by Bedlam because: (no