In Califonia cause of the ST Andreys fault line where the PACIFIC PLATE and the NORTH AMERICAN PLATE slide pass each other.
Thus, my ballpark estimated cost (basically for the AT&T conference call, $50 witness fee, $150 process server's fee; $400 deposition transcript, $25 for copying costs, and about 10 hours of legal work amount to a grand estimated total of about $625 plus 10 hours of legal work.
Deposition. The taking and recording of the testimony of a party or witness under oath before a court reporter, in a place away from the courtroom, before trial. A deposition is part of pretrial discovery. The testimony is recorded by the court reporter, who will prepare a transcript that can be used for pretrial prepration or in trial to contradict or refresh the memory of the witness, or be read into the record if the witness is not available.