When the bridged call appearance feature is enabled for your extension, you can view all your bridged call appearances on the Avaya Vantage™ built-in UC experience. You can select between your extension or a call appearance for outgoing calls. For example, as a secretary, you can choose the bridge call appearance of your boss to make a call on behalf of your boss.
The Call As window on the Avaya Vantage™ built-in UC experience does not show whether the extension for which you have the call appearance is busy. However, your attempt to use the call appearance of that extension to make an outgoing call fails if the extension is in use.