Aftermarket telematics system

An aftermarket telematics system for use with a vehicle having a vehicle bus, the aftermarket telematics system comprising:

• an aftermarket telematics unit configured to be mounted to the vehicle, to communicate with the vehicle bus, and to detect when the vehicle has been turned off;
• and
• a vehicle communication interface device configured to connect to the vehicle bus, to be communicatively coupled with the aftermarket telematics unit, and to facilitate communication between the aftermarket telematics unit and the vehicle bus,
• wherein the aftermarket telematics unit is further configured to send a sleep command to the vehicle communication interface device when the aftermarket telematics unit detects that the vehicle has been turned off, wherein the sleep command instructs the vehicle communication interface device to sleep and to thereafter awaken periodically to detect further commands from the aftermarket telematics unit, and wherein the vehicle communication interface device is further configured to sleep and to awaken in accordance with the sleep command and wherein the aftermarket telematics unit is further configured to sleep after the aftermarket telematics unit detects that the vehicle has been turned off and after sending the sleep command to the vehicle communication interface device.

An aftermarket telematics system for use with a vehicle having a vehicle bus, the aftermarket telematics system comprising:

• an aftermarket telematics unit configured to be mounted to the vehicle, to communicate with the vehicle bus, to detect when the vehicle has been turned off, to transmit and receive over a first wireless communication network, and to transmit over a second wireless communication network;
• and
• a vehicle communication interface device configured to connect to the vehicle bus, to be communicatively coupled with the aftermarket telematics unit, to transmit and receive over the first wireless communication network to facilitate communication between the aftermarket telematics unit and the vehicle bus, and to receive over the second wireless communication network,
• wherein the aftermarket telematics unit is further configured to send a sleep command to the vehicle communication interface device over the first wireless communication network when the aftermarket telematics unit detects that the vehicle has been turned off and to transmit an awaken command to the vehicle communication interface device on the second wireless communication network when access to the vehicle communication interface device is needed by the aftermarket telematics unit, and wherein the vehicle communication interface device is further configured to sleep in response to the sleep command, to receive the awaken command on the second wireless communication network, and to awaken in response to the awaken command and wherein an amount of power consumed by the aftermarket telematics unit and the vehicle communication interface device when communicating on the second wireless communication network is substantially lower than the amount of power consumed by the aftermarket telematics unit and the vehicle communication interface device when communicating on the first wireless communication network.