Method and system for modem protocol discrimination

Details Method and system for modem protocol discrimination Method and system for modem protocol discrimination

2007-05-29

2007-05-29

Nguyen, Duc M. (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

Reexamination Certificate

active

10061406

ABSTRACT:
The invention provides a method of selecting a modem carrier type for data transmission over a wireless communication system. An incoming call is received from a mobile vehicle and then an initial carrier tone is sent to a mobile vehicle in response to the incoming call. A modem response signal is received from a vehicle modem in response to the initial carrier tone. The modem response signal is determined to be either an analog modem response signal or a digital modem response signal, and then the call is connected to either the analog modem or digital modem based on the modem response signal determination.

REFERENCES:
patent: 5999526 (1999-12-01), Garland et al.
patent: 6097966 (2000-08-01), Hanley
patent: 6230010 (2001-05-01), Morris
patent: 6263268 (2001-07-01), Nathanson
patent: 6393031 (2002-05-01), Isomura
patent: 6421376 (2002-07-01), Williams et al.
patent: 6480533 (2002-11-01), Chu et al.
patent: 2004/0047407 (2004-03-01), Fisher et al.

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