Consider Dolby Dimension is connected with a source device (Example: iPad) and you are listening to the media on it. There is another source device(Example : Android mobile) that is already paired with Dolby Dimension but currently not connected.

If you are getting a call on the Android mobile and you wish to answer that call using the Dolby Dimension headsets, you can just switch to the paired Android mobile device by pressing the respective source button on the right ear cup of the Dolby Dimension unit and the call gets connected automatically & can be answered