Circuit arrangement that functions as an interface between a...

Details Circuit arrangement that functions as an interface between a... Circuit arrangement that functions as an interface between a...

2003-09-09

2009-12-01

Appiah, Charles N (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S550100, C455S557000, C379S093060

Reexamination Certificate

active

07627345

ABSTRACT:
The present disclosure relates to a circuit arrangement and a method for defining the signal direction in a data line between the interfaces of a SIM card and a GSM modem, without a control signal for the direction of data and without remote access. According to the disclosure, the transmission direction of the data signals is detected and as a result only one direction is permitted for the transmission, whilst detection in the opposite direction is simultaneously blocked.

REFERENCES:
patent: 5815426 (1998-09-01), Jigour et al.
patent: 5923187 (1999-07-01), Maugars
patent: 6584326 (2003-06-01), Boydston et al.
patent: 6839570 (2005-01-01), Hutchison et al.
patent: 7137003 (2006-11-01), Krishnan et al.
patent: 2002/0047045 (2002-04-01), Song et al.

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