Refer to the exhibit. You are troubleshooting an issue involving Cisco SX20 and EX90. You log in to the codec GUI to make test calls. From which tab do you make test calls via the codec GUI?

The Diagnostics tab provides system logs, call statistics, and error reporting but does not include controls for initiating outbound calls.

The Maintenance tab is used for administrative tasks such as firmware upgrades, factory reset, and backup or restore operations, not for placing calls.

The Configuration tab is used to adjust system settings such as network parameters, SIP registration, and display options, not to initiate calls.

The Call Control tab in the Cisco TelePresence web interface provides real-time call management functions including the ability to dial out and place test calls directly from a browser. This tab exposes dial controls, dial strings, and active call management, making it the designated location for manually initiating calls during troubleshooting. It is accessible without physical access to the endpoint or a remote control.

The Home tab provides a status overview of the endpoint including registration status and system health, but does not offer call initiation controls.

Calls can be made via the codec GUI, specifically from the Call Control tab, so CLI is not the only method available.