What is a limitation of Webex Calling in terms of connectivity?

Webex Calling relies on an internet connection to function, which is fundamental to its operation as a cloud-based communication platform. Without a stable internet connection, the service cannot effectively process voice calls, manage features, or ensure a reliable user experience. Voice over IP (VoIP) technology, which Webex Calling utilizes, is highly dependent on a consistent and robust internet connection for clear audio transmission and timely data packets. This characteristic highlights the necessity for users to have reliable internet connectivity to fully leverage Webex Calling services.

In contrast, other options pertain to either geographical limitations, hardware dependencies, or features that don't accurately reflect the core operational requirement of Webex Calling.