A dynamic circuit network (DCN) is a production advance bandwidth reservation service. The majority of DCN operators currently provide a single class of service (CoS), e.g., either a guarantee of bandwidth or no guarantee of quality of service. Although single CoS provisioning is viable and expedient, multiple classes of service (multi-CoS) provisioning offers greatly superior practice, including quality-based charging for a commercial service and efficient resource management. This paper proposes a multi-CoS architecture with bandwidth and delay guarantees in a DCN, more specifically, the deployment of On-Demand Secure Circuits and Advance Reservation System (OSCARS) over multiprotocol label switching (MPLS) networks. The main contribution of this paper is a guaranteed bandwidth-and-delay class where the system can compute the path which can satisfy the given bandwidth and delay constraints. Our system was tested on practical routers.