Telephony-enabled network processing device with separate TDM bus and host system backplane bus

摘要

A PC-based server platform includes a first backplane bus used for transferring data and commands to various PC peripheral devices. A network router and a telephony endpoint card are coupled to the backplane bus and separately coupled through a second Time Division Multiplexed (TDM) bus. The router includes interfaces to various packet switched networks such as a Wide Area Network (WAN) and a Local Area Network (LAN). The TDM bus is used to route telephony data between the different Internet Protocol (IP)-based networks and the telephony card independently of the host system. The PC host processor also uses the router as a standard LAN interface for transferring data packets. A DSP voice processing card is coupled between the backplane bus and the TDM bus to compress and decompress the telephony data transferred on the TDM bus.