The bottom function-realizing module is a key part of the Common Design Platform(CDP) of Multimedia Simulation and Training System(MSTS) for the Stored Program Controlled Telephone Exchange(SPCTE). Hardware configuration is the foundation of the SPCTE, the important part of the bottom function-realizing module. The modeling of the hardware of the SPCTE is proposed. Two typical SPCTE are used to explain and verify the models. The application of the models in the CDP is also given.