Transponder maintenance mode method
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United States of America Patent
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-
Nov 11, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Apr 6, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and system is provided for communicating permanent or semi-permanent information to a transponder (14) from an interrogator (12), preferably operated by a toll agency or other authorized entity. This permanent or semi-permanent information is communicated by means of special instructions valid only during a special mode or maintenance mode which is entered by transmitting a special access code to the transponder (14) from the authorized interrogator (12). The transponder (14) will preferably acknowledge to the authorized interrogator (12) that it is, in fact, operating in the maintenance mode so the interrogator (12) can transmit the special instructions in confidence.
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