Multiplexed TTY signaling for telematics

Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object

Reexamination Certificate

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C455S099000, C455S569200

Reexamination Certificate

active

07323973

ABSTRACT:
In response to a triggering event at a location such as a vehicle that has crashed a telematics system initiates a telecommunications call via telecommunications link8to PTN10, through which it is routed to local 9-1-1 system14and thereby to local PSAP18. Telematics system2waits,26(N), for local PSAP18to respond,26(Y), then exchanges ACN data with it per TTY protocols,28. The PSAP then sends a command code back to the vehicle or other location to allow for voice communications with a person at the location. Other functions such as shutting the vehicle engine off can also be controlled by PSAP.

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patent: 6983171 (2006-01-01), Van Bosch et al.
patent: 2005/0261035 (2005-11-01), Groskreutz et al.
patent: 2005/0273211 (2005-12-01), McGarry et al.
patent: 2005/0277440 (2005-12-01), Van Bosch et al.
patent: 2006/0030298 (2006-02-01), Burton et al.
patent: 2007/0167200 (2007-07-01), Wong et al.

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