There is no surefire way to bypass Do Not Disturb on a call, but there are a few methods you can try. One is to call from a different phone number, preferably one that is not associated with you. Another is to try calling at different times of day, as the person you are trying to reach may have their Do Not Disturb setting set to only allow calls during certain hours. Finally, you can try leaving a voicemail and hope that the person you are trying to reach will check it.