Cisco WebEx Meeting Center is a cloud-based service that provides video conferencing, screen sharing, chat, and other collaboration features for online meetings. Cisco WebEx Meeting Center can support calls from end points and WebEx clients, as well as from other devices and applications. End points are devices that are registered to the Cisco WebEx cloud, such as Cisco IP Phones, Cisco video devices, and third-party devices that use SIP to connect to the WebEx Suite services. WebEx clients are applications that run on desktops, laptops, tablets, or smartphones, such as the WebEx app, the WebEx Meetings app, or the WebEx Teams app. Users can join WebEx meetings from end points or WebEx clients, and they can also dial in or dial outto other numbers using the WebEx cloud. The other options are not valid Cisco WebEx products that can support calls from end points and WebEx clients. Cisco WebEx Training Center, Cisco WebEx Support Center, and Cisco WebEx Event Center are specialized services that provide additional features for specific use cases, such as online training, remote support, and large-scale events. However, they do not support calls from end points or WebEx clients, and they require users to join the meetings using the WebEx Meetings app or a web browser. References: Network Requirements for Webex Services, Overview of Webex Calling, Webex Calling—Cloud Phone System
