Then, the design and realization of embedded PSTN gateway and audio terminal are discussed, the realization of embedded software and PSTN gateway that supports multi-terminals are emphasized.

This paper introduces the development background of network audio playing terminal based on DS80C400, and expounds the system function requirements and the design of software and hardware.

Conference room type terminal usually combination plenty of accessories, such as audio systems, additional camera, document projector, and PC collaborative document communication.