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.
So I've discovered there is a way of doing this.
I found this answer on Quora:

https://www.quora.com/Where-is-the-call-waiting-option-on-Android-7

There's a video there and the answer is essentially :


Open the phone app Press the Menu button (3 dots top right) 
Press   Settings
Press Calling Accounts 
Press on your call Operator (Was EE in my case)
Press Additional Settings 
Slide Call   Waiting to disabled