Research and Implementation of VoIP ATA Based on Single DSP

This paper presents a VoIP ATA solution based on a single digital signal processor(DSP).DSPs are suitable for arithmetic-intensive application and unsuitable for control-intensive application because of the limitation of I/O and memory resources.This solution is based on a 16-bit fixed-point DSP and μC/OS-II embedded real-time operating system.It makes good use of the limited resources,supports SIP and TCP-UDP/IP protocol.It can connect the analog telephone to Internet and realize the VoIP application.This system has a great future for its high efficiency and low cost.