Disable internal video calling between zoom phone uses

I've never done video calling with Zoom Phone, is that basically just elevating it into a meeting? If so, at the account level, this policy setting should control that:

1 to 1 video call is possible without a meeting.

So more than 2 would be blocked. however what else is affected globally by that setting?

As is a Zoom Phone policy, shouldn't impact anything outside of Zoom Phone.