A structure of a wireless communication device for calling an emergency
report center via a cellular phone network is simplified. Further,
provision is made so that voice communication can be established with the
emergency report center from anywhere. To provide such an advantage, a
built-in wireless communication section is used to transmit data,
including a phone number of a cellular phone possessed by a user in a
vehicle when an emergency report is made to the emergency report center
via the cellular phone network. An operator in the emergency report
center uses the phone number of the cellular phone to establish voice
communication with the user. Since the built-in wireless communication
section does not require a voice communication circuit, the wireless
communication device structure can be simplified to reduce a size and
cost of the device. Further, the emergency report center can establish
voice communication with the user even when the user has to stay away
from the vehicle depending on a situation.