In-vehicle emergency call unit and in-vehicle emergency call system

摘要

In accordance with the present disclosure, newly acquired position is transmitted to a service center to accurately provide a vehicle position when a starting trigger of an emergency call occurs even in a situation where position information is unobtainable from a navigation system. When a problem occurs in a navigation system or a communication line while the navigation system is running, and an in-vehicle emergency call unit becomes unable to receive position information from the navigation system, the in-vehicle emergency call unit saves position information that a positioning unit has acquired by autonomous positioning instead of position information received from and acquired by the navigation system. The in-vehicle emergency call unit then transmits to a service center the saved position information when a starting trigger occurs.