The "OnStar®" operation is actually a combination
of many different technologies working together to form the OnStar® Service.
| • | Cellular Telephone Equipment with Handsfree Audio Processing. |
| • | Global Positioning System ( GPS) satellite navigation system. |
| • | GM Class 2 Electronic Communications between Vehicle Component
Modules. |
| • | GM Universal Asynchronous Receiver Transmitter (UART) communications
on vehicles with limited Class 2 communications. |
| • | Entertainment and Communications buss (E&C) Communication
between vehicle entertainment and comfort modules. |
| • | Desktop computer software allowing the OnStar® Center advisors
to send/receive data to the vehicle over the cellular modem. |
| • | Map software that allows the OnStar® Center to view the vehicle's
exact location superimposed on a computer generated map. |
| • | Extensive database storage and retrieval capabilities to allow
OnStar® Advisors the ability to quickly access requested information. |
