What connectivity option is referred to as Over the Top in Webex Calling?

The term "Over the Top" (OTT) in the context of Webex Calling refers specifically to services that are delivered directly over the internet without the need for a dedicated infrastructure or specialized hardware from a telecom provider. OTT solutions allow users to access calling services by utilizing existing internet connections, enabling a flexible and scalable option for businesses and users alike.

In Webex Calling, this connectivity method typically involves using VoIP (Voice over Internet Protocol) technology, which provides voice communication through the internet rather than traditional telephony networks. This approach is cost-effective and can simplify deployment, as it removes the need for separate phone lines or equipment. Users can easily manage their calling services through an application or web interface, making updates and changes more accessible.

Other options mentioned, such as Direct Connect, Dedicated Line, and Virtual Private Network, represent more traditional ways of establishing communication or data transfer with specific requirements for hardware or direct connections, which do not embody the flexibility and internet-based nature of the OTT model.