Method and system for line isolation
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United States of America Patent
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Nov 23, 1999
Grant Date -
N/A
app pub date -
Oct 14, 1997
filing date -
Oct 14, 1997
priority date (Note) -
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Abstract
A method and apparatus for transceiving data across an isolation boundary in a communication network between a user device on a user side of the isolation boundary and a line-side associated with a communication network such as a telephone network. Transmit data on the user side and receive data on the line-side are pulse modulated using known techniques such as pulse position and pulsewidth modulation methods. The resultant pulse modulated data streams then digitally traverse the isolation boundary via an isolation device such as an optocoupler. Upon completion of the traversal of the isolation boundary, the traversed pulse modulated data is integrated to form an approximation of the original transmit and receive data, respectively, without added distortion from a traversal of the isolation boundary by analog data.
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