It addresses non-conversational use cases of the codec (e.g. call waiting music playback and recording of teleconferencing sessions, voice mail messages).
Supported capabilities include video teleconferencing and other collaborative tools such as electronic whiteboarding and distributed war-fighting simulations.
These 9 factors are: screen factors, terminology and system feedback, learning factors, system capabilities, technical manuals, on-line tutorials, multimedia, teleconferencing, and software installation.