OnePlus How to enable or disable repeat callers in Do Not Disturb mode

In addition to the exception that calls from selected contacts or contact groups (favourites) on the OnePlus smartphone can be allowed in Do Not Disturb mode, another option can be checked or enabled that allows repeated calls from the same phone number within 15 minutes, if the call is urgent or even emergency.

Note: This bypasses the function and puts the call through with a ring tone and vibration.