The news media were to become regular users of mobile links to satellites using specially equipped trucks, and much later via special satellite videophones in a briefcase.
One of the most important may be psychological: just as many people choose to listen to radio instead of watching television, individuals can prefer regular telephone conversations over videophone calls.
It specifies technical requirements for narrow-band visual telephone systems and terminal equipment, typically for videoconferencing and videophone services.
The interpreter works from another locationeither an office, home-based studio or call centeralso using a videophone or web camera and television or computer screen.