Need a business rule to NOT send SMS upon new ticket creation

Need a business rule to NOT send SMS upon new ticket creation

I currently have a business rule that sends SMS's to technicians as new tickets are created. However, I have 1 class of tickets for which a SMS should not be sent. The distinguishing characteristic of these tickets is a phase embedded in the body of the ticket.  Can anyone help with the business rule config?

                  New to ADSelfService Plus?