The highly integrated and low cost AR168M VoIP module is designed to shorten the development cycle for device which need to do voice communication over IP network. AR168M module brief, hardware manual.
Although we provided a sample design to build an IP phone based on 8051+AR168M, this was not what we recommended to do with it, actually single AR1688 is enough for an IP phone. For other applications, user need to define and implement the serial protocols actually used, the communication protocol between 8051 and AR168M in our demo is provided only as a sample.
Here is another IP phone design based on AR168M by Steven when he was an undergraduate student in BUPT. The controler used in this design is MEGA128L.
AR168M FAQ.
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