Method and system for modem protocol discrimination
AssigneeGeneral Motors Corporation
InventorsDwayne Crocker, Ronald W. Fraser
Life of this patent
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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.
Claims18
A method of selecting a modem carrier type for data transmission over a wireless communication system, comprising:
- receiving an incoming call from a mobile vehicle;
- sending an initial carrier tone to the mobile vehicle in response to the incoming call;
- receiving a modem response signal from a vehicle modem in response to the initial carrier tone;
- determining whether the modem response signal is one of an analog modem response signal or a digital modem response signal;
- and
- connecting the call to one of an analog modem or a digital modem based on the modem response signal determination.
A wireless modem system for selecting a modem carrier type comprising:
- means for receiving an incoming call from a mobile vehicle;
- means for sending an initial carrier tone to the mobile vehicle in response to the incoming call;
- means for receiving a modem response signal from a vehicle modem in response to the initial carrier tone;
- means for determining whether the modem response signal is one of an analog modem response signal or a digital modem response signal;
- and
- means for connecting the call to one of an analog modem or a digital modem based on the modem response signal determination.
A computer usable medium including a program for selecting a modem carrier type, comprising:
- computer program code for receiving an incoming call from a mobile vehicle;
- computer program code for sending an initial carrier tone to the mobile vehicle in response to the incoming call;
- computer program code for receiving a modem response signal from a vehicle modem in response to the initial carrier tone;
- computer program code for determining whether the modem response signal is one of an analog modem response signal or a digital modem response signal;
- and
- computer program code for connecting the call to one of an analog modem or a digital modem based on the modem response signal determination.
Dependencies are inferred from the claim text.