Drag & Drop:
Simply Drag the Speed Dial onto the Call Status area. The call will then be initiated.
Double Click:
Double Click the Speed Dial you want to call.
Right Click the Speed Dial:
If you want to call a number that is not the Default Number you can right click the speed dial you want to dial and select an alternate number. To do this simple right click and select Call | Work Phone/Home Phone/Mobile/Fax