We added extensions during the User Settings Wizard, but now we will add an extension using the system management console. There are three ways to add an extension as shown in the following screenshot:
We will now be presented with the extension's General settings tab. You will notice that the Extension Number is automatically populated with the next available extension number. Because we entered 101 to 103 in the tutorial, we are presented with 104 in the 3CX User Settings Wizard.