In
videoconferencing systems, cascading is
the term used to describe the method for allowing multiple participants to enter
the conference beyond what a single
multipoint control unit
(MCU) can support. Cascading usually means to connect two separate MCUs,
where the second MCU acts and is treated as other participants. The host MCU
will send the joining MCU the processed data streams which are then distributed
to its the videoconference participants.