Thanks for your feedback, rMs_000.
People dialing from outside Qatar will receive an automated message asking them to redial with an added digit. The international code for Qatar (+974) will not be affected. You will simply need to add the additional digit to the original number.
Supreme Council of Information and Communication Technology (ictQATAR)
Website: http://www.ictqatar.qa
Blog: http://www.digitalqatar.qa