Making calls is easy. Just activate the Biscotti Menu Bar by pressing any button on the remote control, scroll down to a the Contacts icon (second from top) and press the select button. Navigate to the desired contact and hit select again to call. If you do not see your contact, then add a contact by selecting Add New at the top of the list.
Receiving calls is even easier. When a call comes in, you will see a window in the upper right of the screen. To answer, choose "Accept" from the on screen menu.
How do I place a call?, How do I make a call?