Communication system, converter for use therein and method of signalling
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United States of America Patent
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N/A
Issued Date -
Aug 2, 2007
app pub date -
Mar 31, 2004
filing date -
Apr 2, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A communication system comprises first and second devices (2,3) having respective housings (5,6); a data trans-mission line (8) for transmitting data between the devices in a reflective signalling format; and conversion means (4) connectable to the line externally of the housings (5,6) for converting data between a reflective signalling format and another format. A method of signalling between first and second devices (2,3) linked by a transmission line (8) and of sensing a security violation of the line (8) comprises the steps of (a) transmitting a signal from the first device to the second device, reflecting the signal back to the first device in a manner corresponding to a first bit sequence, receiving the signal thus reflected at the first device, and comparing this signal with the transmitted signal to determine whether there has been a security violation of the line and to extract the first bit sequence.
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