| 摘要 |
<p>There are many occasions when it is desirable to be able electronically to transfer data between a movable electronic data reservoir ("datavoir") and a fixed datavoir. The invention provides a system for electronically transferring data between a vehicle and a communications headquarters, in which:- a primary datavoir is located at the communications headquarters; a plurality of stationary secondary datavoirs are located at different positions within the relevant area, and are each connectable to the primary datavoir by a slow electronic data transfer link; a tertiary datavoir is carried by the vehicle; and each secondary datavoir is connectable to the tertiary datavoir by a fast electronic data transfer link; whereby data may be electronically transferred between the primary datavoir and any secondary datavoir at a slow rate while the vehicle is unconnected to the latter, and may be electronically transferred between the secondary datavoir and the vehicle-borne tertiary datavoir at a fast rate while the vehicle is connected thereto. <IMAGE></p> |
