You can make outbound calls in two ways:
Using the Number Field or Dial Pad:
Enter the number in the number field or use the dial pad on your screen.
Once you have entered the number, click Call.
Using Quick Connects:
On your CCP, click Quick Connects.
Select the quick connect from the list or enter a few letters to search for a quick connect.
Click Call.
For the official AWS guide on this lesson you can visit https://docs.aws.amazon.com/connect/latest/adminguide/make-outbound-calls.html