From Bright Pattern Documentation
<translate>= Ringtones and Alerts = The Ringtones and Alerts setting lets you customize the volume of various incoming notifications (e.g., chat messages, in queue notifications, etc.). Additionally, the volume level for external phones and softphones may be customized for various phone situations (e.g., incoming calls, call waiting for incoming calls while talking, etc.).
To customize your volume settings, select Ringtones and Alerts from the settings menu; the pop-up window contains volume slider controls for External chat and preview record notifications and Incoming calls. To hear a preview of the volume, click the speaker 
icon.
</translate>