Which ad hoc multipoint feature is supported only when properly configured and when the endpoint is registered to the Cisco VCS?

Multisite is a hardware-based capability built into select Cisco endpoints and does not require VCS registration to operate.

Multiway is an ad hoc conference escalation feature that works by redirecting a point-to-point call to a conferencing resource via the VCS, requiring the endpoint to be registered to the VCS and requiring specific dial plan and conference factory configuration to be in place. Without VCS registration and correct configuration, the Multiway option is simply unavailable on the endpoint.

WebEx enabled Cisco TelePresence relies on WebEx cloud infrastructure and does not depend solely on VCS registration for its multipoint function.

Collaboration Meeting Room (CMR) is a cloud or Unified CM-based service and is not contingent on VCS registration.

Cisco MCU is a standalone conferencing bridge that endpoints can dial directly without requiring VCS registration.

Cisco TelePresence Server operates as an independent conferencing resource and does not require the calling endpoint to be registered to VCS.