According to the User Guide on Page 22 the telephone should auto dial numbers in the calls list: "Dial from the Calls List 1. Press Calls to view the Calls list. 2. Scroll Up arrow or Down arrow to the entry you want. 3. To dial the displayed number lift the handset or press Tick arrow or Handsfree button."
Unfortunately doing any of the options in 3. simply provides a dial tone only.