To provide an interfacing system between a device mounted on a vehicle including a voice communicator and a data communicator located on the vehicle and a voice portal server outside the vehicle.

An onboard device electronically communicates with a voice communicator and a data communicator. A method to offer information to the crew on the vehicle uses the voice communicator, the data communicator, the onboard device, the base station, the voice portal server. The voice portal server electronically communicates with the base station, the base station communicates by wireless with the voice communicator and the data communicator, the onboard device electronically communicated with the voice communicator and the data communicator. The crew communicates a request of an information with the voice portal server via the voice communicator and the base station. The voice portal server communicates the coincidence of the information via the base station and via the data communicator and the voice communicator.