This paper defines the meaning of fairness more suitable for AF PHB in DS network. Besides, this paper argues that responsive and un responsive flows should be treated differently only to their out of profile traffic. In addition, traffic responsiveness should be identified by its behavior rather than simply by protocol. Moreover, two markers, srTCM and trTCM, with eight mapping schemes are examined by simulations to check whether they can provide fairness in DS networks. This paper also defines fairness area as the network load range where the DS network can provide fairness to responsive and un-responsive aggregate by marking without discriminating,and parameters configuration of the area is also given.