I need an phone app that is a scaled down iax voip phone that make calls only one number. What I visualize is an app that starts with single button (CONNECT) and when pressed it will connect to my asterisk server. Once connected, the app will display a telephone keypad where the user will need to enter their passcode. After passcode is entered, they can press button 1 to 8 the hear selection under each button
How would you do this?