Be sure to ask your DET for details. Interaction with the distant student is neither difficult, nor does it detract from the local student. It does, however, require patience and a diligence in behavior. If at all possible, make office hours available via a toll free number. The phone bridge works well for group help sessions and periodic reviews.
Computer conferencing via the world-wide web is also effective.
During lectures, solicit call-ins often. Be sure to acknowledge each caller. Accepted practice will allow an instructor to finish a train of thought, but be prepared to go back to earlier material. It takes time for the student to get through to the control room. Discussions need not, however, overtake the class.