| 摘要 |
PROBLEM TO BE SOLVED: To efficiently execute the simultaneous time-sharing of both the data and conversation of May Day reporting and the May Day reporting and travel path guidance communication by transmitting required data, for example, via a line connection device, a data communication modem, and a connection means between a portable information exchange device or an information exchange device that mounts a traveling body and a specific station. SOLUTION: When an emergency communication command signal is generated, an information exchange device 1 transmits the ID and a position in reference to the ground of the device 1 by communicating data, connects a handset to a first line connection device for a specific amount of time after that, and transmits data to a specific station 100 via a first data communication modem and a first connection means after a specific amount of time. More specifically, data transmission and conversation connection are repeated alternately by time sharing. The specific station 100 receives the data, connects handsets MI and HH to a second line connection device UT by a second connection means AS during a specific amount of time after the reception, and repeats data reception and conversion connection alternately by time sharing in synchronization with the transmission of the information exchange device 1 via the connection device UT, the connection means AS, and a second data communication modem UM after a specific amount of time. |
