Recommendation ITU-T H.248.19 describes the functionality of a decomposed multipoint control unit, in particular the interface between a media controller and media processor which is based on Recommendation ITU‑T H.248.1. This Recommendation contains guidelines for the use of a decomposed gateway that may support audio, video and data conferencing. This Recommendation contains packages for floor control, volume control, video windows, audio and video mixing for point-to-point, multi-cast and hybrid conferencing scenarios.

This revision incorporates corrections to fix a duplicated binary Release Event identity and a duplicated Result parameter binary identity.