Messaging application layer over ethernet to transport layer (TCP) communications method and apparatus for a modular terminal input/output system
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United States of America Patent
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Sep 15, 2009
Grant Date -
May 30, 2002
app pub date -
Nov 26, 2001
filing date -
Oct 6, 1998
priority date (Note) -
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Abstract
A communications adapter is provided for interfacing between a master device and an I/O device (body) having an output and/or an input. In the case of the I/O body having an output, the adapter has a TCP port for coupling to the master device via a transmission path for receiving a request message. The adapter also has a connector for operable coupling to the I/O device for receiving the output of the I/O device. The adapter further has an interface circuit operably connected to the TCP port and the connector for transmitting a response message over the transmission path in response to the request message, the response message correlating to the output received from the I/O device. The request message and the response message is limited to a length that is less than a TCP transaction length and/or a maximum transmission unit limit, or both, depending on the embodiment of the present invention.
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