| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To simplify the application of a device to be managed and reduce its price by making the communication of a satisfactory response possible without lowering a security level. <P>SOLUTION: The remote monitoring system is composed of a virtual leased line 1, a plurality of devices 3 to be managed connected therewith via a LAN 2 and a control center 5 connected with the virtual leased line 1 via a LAN 4. The virtual leased line 1 is composed of routers 11 and 12. The router 11 encrypts data, identification information and destination information sent from a communication terminal 32, prepares a tunneling packet by adding the destination information of the router 12 thereto and sends it onto the Internet 10. The router 12 receives the tunneling packet, decrypts the encrypted data, the encrypted identification information and the encrypted destination information contained in the tunneling packet and transmits the data and the identification information to the control center 5 based upon the destination information. The control center 5 pairs and collects the data and the identification information from each of the devices 3 to be managed. <P>COPYRIGHT: (C)2004,JPO</p> |
