My prediction is there is not testimony coming that will confirm how a call was made. If there is, then the prosecution picked an incredibly lame way to question the Cisco guy. He kept him up there for hours talking about all of these confusing, very technical ways of doing clever things with VoIP and call servers. I'm sure that the jurors were either about to fall asleep or have their heads explode.
If they have proof of which of the 10 ways he used to do it, they should have just focused on that way. Have the VoIP expert explain how it works, then show the data that proves that it was done. Instead, he treated the jurors to a smorgasbord of possible ways with no implication that they had any idea of which was used.
This isn't Christmas. You don't have to let the anticipation build.