Which description of Cisco WebEx Telepresence is true?

 = Cisco WebEx Telepresence is a cloud-based service that enables on-premises endpoints to register to Cisco infrastructure in the cloud and join video calls with other WebEx Telepresence users or compatible standards-based conferencing systems over the Internet. It also provides features such as directory, presence, scheduling, and management for the registered endpoints. Cisco WebEx Telepresence works with various Cisco TelePresence endpoints, such as multipurpose, integrator, personal, and video mobility systems123. References := 123