“Today’s distance work is interesting because available technology is changing rapidly, and groups vary enormously in what they have access to. However, to support synchronous work we can assume that today the options include:
a. Telephony in its current incarnation.b. Meeting room video conferencing. c. Desktop video and audio conferencing. d. Chat rooms for text interactions.e. File transfer.f.  Application sharing.g. Some very primitive virtual reality options (Olson, 2000).”
Related: Distance Learning, Definition(s) of“Distance learning is training that takes place largely synchronously; that is, the material is delivered to all participants at the same time even though participants are separated by geographical distance…Types of distance learning technologies include: one-way and two-way interactions using audio (e.g., audiotape, voice mail, audioconferencing), data (e.g., computer-based training, internet), video (e.g., videotapes, video messaging, two-way videos), and combinations of audio, video and data (e.g., multimedia programming, multimedia messaging) (Burgess & Russell, 2003).”

Olson, G.M. (2000). Distance matters. Human Computer Interaction, 15(2/3), 139-178. Burgess, J.R.D. & Russell, J.E.A. (2003). The effectiveness of distance learning initiatives in organizations. Journal of Vocational Behavior, (63)2, 289-303.