Modern high speed integrated services networks have to support applications with diverse traffic characteristics and performance requirements. One of the most interesting approaches to integrate the different types of traffic is the theory of effective bandwidth. The effective bandwidth of a time varying source is the minimum amount of bandwidth required to satisfy its QoS. In this paper, we present a new deterministic traffic model that is based upon the effective bandwidth notion. The model is derived from a worst-case analysis of the traffic on a single-node basis. It uses a simple method to evaluate the minimum resources needed to guarantee the deterministic QoS requirements of a connection. The model is thoroughly analyzed and compared to other deterministic models available on literature. It achieves accuracy, simplicity of traffic characterization and of admission tests. Moreover, it simplifies the pricing process.