Disable Call Waiting

Is there a way on Android to disable call waiting? Quite often I'll be in a conference call and suddenly one of my friends tries to call me when I'm in the middle of discussing something quite complicated. The phone will start blipping at me to indicate the second call is coming in. I'm really not great at multi-tasking and this completely throws me from the discussion I'm already in. Is there a way to set the phone to redirect the secondary caller straight to voicemail? I'm using a Motorola One Vision.