Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-07-26
2005-07-26
Young, W. R. (Department: 2685)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S575200, C381S094500
Reexamination Certificate
active
06922572
ABSTRACT:
An apparatus and method for correctly sensing the state of a 4-pole earmicrophone having two receiver terminals and two common terminals for a microphone and a switch in a mobile terminal. The mobile terminal senses a switch-on of the earmicrophone by mechanical connection between an earmicrophone jack and a jack connector during an earmicrophone connection. The mobile terminal stores information about an earmicrophone state detected by the jack connector. Upon detection of the switch-on of the earmicrophone, the mobile terminal reads the earmicrophone state information from the memory. If the read earmicrophone state indicates earmicrophone disconnection, the mobile terminal mutes transmission and reception, determining that the switch-on is a transient phenomenon.
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Dilworth & Barrese LLP
Phuong Dai
Young W. R.
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