When you try to activate Minitab 15, this dialog will appear. It suggests that you can activate by phone, fax or email. It provides a challenge code, and prompts you for a response code.
However, Minitab 15 cannot be activated by any method because the activation servers are not available. Minitab 15 has reached its end-of-life, so all support and maintenance for this product has ended.
If you are interested in upgrading to the latest version of Minitab, please contact your Minitab Sales representative.