Ncr Corporation

Carlton J Hunt

David Sokoler

John E Montague

In jamming the data field of a data frame being transmitted at a sending end, a CRC error is caused at a receiving end. To instead avoid such CRC error, a section of bits is inserted into the data frame, so that CRC based on the section of bits is forced to a constant bit pattern. From that point on, all the bits transmitted will be jammed to the constant CRC bit pattern. Thus, any appropriate number of bits (assuming it is at least 32 bits) after that section is the correct CRC based on the jammed data frame. Advantageously, after detecting the ending flag of the jammed data frame, the last 32 bits of the jammed data frame will be the correct CRC at a receiving end.

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Howell, NJ, United States of America

Carlton J Hunt