The court may order, upon a showing of appropriate safeguards, live testimony of a witness to be presented in open court by teleconference, video link, or other visual remote technology, if the witness is beyond the subpoena power of the court or when compelling circumstances are shown. The order may be entered at a pretrial conference or, in exceptional circumstances, on motion set for hearing at least ten days prior to trial or at another time that does not prejudice the parties.