In this paper, a new overload control scheme is proposed for a stored program control system. The proposed control scheme is fit for a distributed architecture. In a distributed architecture, most of the call control functions are distributed to many subscriber control processors(SP) and some functions as number translation and routing control are centralized to central processors(CP). Therefore the performance of the CP is critical to the switching system. We needed a control scheme that ensures the proper operation of the CP in overload condition. We conducted lots of simulation experiments to evaluate the performance of the proposed overload control scheme and concluded that the proposed overload control scheme is very effective for a distributed architecture.