What is the benefit of having a hard limit on concurrent calls in Webex Calling?

Having a hard limit on concurrent calls in Webex Calling is advantageous because it optimizes network performance by controlling call volumes. By setting a maximum number of simultaneous calls that can be processed, the system prevents congestion and ensures that the available bandwidth is used efficiently. This way, the quality of each call can be maintained, reducing the likelihood of dropped calls, latency, and other issues that may arise from overwhelming the network.

When call volumes exceed capacity, users may experience poor service quality, which could lead to frustration and potentially lost customers. A hard limit helps in managing expectations and provides a stable experience for all users. This balance helps prioritize existing calls and maintain operational efficiency within the network environment.

The other options focus on aspects like unlimited calls, increasing revenue, or limiting call duration, which do not pertain directly to the performance management required in a VoIP environment. The focus on optimizing network performance is crucial for delivering a seamless communication experience in any calling system.