why is my V20 android version 7.0 going straight to voice mail without ringing?

[Android Central Question]

I have my volume setting set all the way up. I will be sitting right next to my phone, receive the little tone (like I get when I receive a txt) and instead it says `New Voicemail'

 

[Laura Knotek]

Welcome to Android Central.

Do you have "do not disturb" enabled?