关键词: 有限状态机, 语音信箱, FPGA, VHDL, GW48

Abstract:

Voice mail service is one important telecom value-added service,and there are many approaches to its realization.Increasingly complicate service requirements for voice mail service increase the number of internal states in voice mail system by many folds.For the limitation of single state realization,this article proposes a design of voice mail system based on finite state machine,which can implement complex states transition.The simulation and test show that the FSM can control states transition of voice mail system very well.The delay of transition is small enough and without glitch.Simple in structure,low in cost and high in reliability,this method provides practical reference for complex states transition.

Key words: FSM;voice mail system;FPGA;VHDL;GW48