An engineer must ensure that bridging of several separate conferences to create a single large conference occurs and increases MCU call capacity.

Multiway is a Cisco feature that allows a user to escalate a point-to-point call into a conference by adding participants, not a method for interconnecting MCUs.

Ad Hoc conferencing refers to a conference created spontaneously during a call and does not describe any MCU interconnection topology.

Multisite is an endpoint-level capability that allows an endpoint to host a multi-party conference internally without an external MCU, not a method for bridging separate MCU conferences.

Multipoint describes a conference involving more than two endpoints but does not refer to the specific technique of bridging multiple MCU units together.

Cascading is the process of interconnecting multiple MCU units so that separate conferences on each MCU are bridged into a single unified conference. This technique allows organizations to exceed the port limit of a single MCU by chaining units together, effectively scaling capacity for large events or high-demand deployments.