Method and system for modem protocol discrimination
First Claim
Patent Images
1. 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;
prior to sending an initial carrier tone, obtaining a call routing number associated with the incoming call via an inbound dialed number information service or an automatic number identification service;
sending the initial carrier tone to the mobile vehicle in response to the incoming call and in response to i) determining that the call routing number is not available or ii) determining that the call routing number does not correspond with a call routing number in a database of call routing numbers;
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.
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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.
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Citations
13 Claims
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1. A method of selecting a modem carrier type for data transmission over a wireless communication system, comprising:
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receiving an incoming call from a mobile vehicle; prior to sending an initial carrier tone, obtaining a call routing number associated with the incoming call via an inbound dialed number information service or an automatic number identification service; sending the initial carrier tone to the mobile vehicle in response to the incoming call and in response to i) determining that the call routing number is not available or ii) determining that the call routing number does not correspond with a call routing number in a database of call routing numbers; 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless modem system for selecting a modem carrier type, comprising:
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means for receiving an incoming call from a mobile vehicle; means for obtaining a call routing number associated with the incoming call via an inbound dialed number information service or an automatic number identification service; means for sending an initial carrier tone to the mobile vehicle in response to the incoming call, wherein the means for sending the initial carrier tone performs in response to i) determining that the call routing number is not available or ii) determining that the call routing number does not correspond with a call routing number in a database of call routing numbers; 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. - View Dependent Claims (8, 9, 10, 11)
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12. A computer usable medium including a program for selecting a modem carrier type, comprising:
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computer program code for receiving an incoming call from a mobile vehicle; computer program code for obtaining a call routing number associated with the incoming call via an inbound dialed number information service or an automatic number identification service, computer program code for sending an initial carrier tone to the mobile vehicle in response to the incoming call and in response to i) determining that the call routing number is not available or ii) determining that the call routing number does not correspond with a call routing number in a database of call routing numbers; 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. - View Dependent Claims (13)
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Specification