Method and apparatus for asynchronous PPP and synchronous PPP conversion
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United States of America Patent
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Sep 9, 1997
Grant Date -
N/A
app pub date -
Jul 25, 1995
filing date -
Jul 25, 1995
priority date (Note) -
In Force
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Abstract
A data communication system referred to as an Asynchronous/Synchronous Converter is provided to facilitate the communications between a data terminal equipment (DTE) device using the asynchronous communication port, and a dial-up router located in a digital network. When running a dial-up TCP/IP program over the asynchronous port, DTEs use a protocol called Asynchronous Point-to-Point Protocol (Asychronous PPP). On the other hand, dial-up routers usually support Synchronous PPP. The data communication system of the invention connects the DTE to the digital network and ultimately to the dial-up router and provides two way conversion between Asynchronous PPP and Synchronous PPP that is transparent to both the DTE and the router. This two way conversion is enabled in part by the converter intercepting and storing certain link control protocol (LCP) packets and using data in those packets to effect a translation.
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