Read the paper at the link of my earlier reply to you. Digitized voice will pass through a number of relay points getting from point A to point B, with each point introducing a delay. Yes, your voice (and my voice, and everybody's voice) does get "recorded" in the process of digitization. That recording, as far as I know, does not get stored or retained past the point where it's passed to the next relay point.
“Yes, your voice (and my voice, and everybody’s voice) does get “recorded” in the process of digitization. That recording, as far as I know, does not get stored or retained past the point where it’s passed to the next relay point. “
In the process of buffering, which causes delay, the buffer space is re-used several times a second. “Recording”, in the sense of creating a permanent record is a separate act where the bits are duplicated and sent to a permanent storage medium...an act which does not delay the transmission of the communications and is not related to any such delay...so no need for the “as far as I know” qualification. :)
So going back to the beginning statement “They have the content of the voice call too”, the delay is neither proof nor evidence of that conclusion. The phone company certainly has no need of such an expensive and pointless operation.
Now, the subpoenaing the NSA could be interesting...