| 摘要 |
PURPOSE: To recognize the inside state of a remote display controller. CONSTITUTION: A switch part 31 is provide on a transmission line set between a server 1 and an operating terminal 2 to select time connection between the terminal 2 and the server 1 or the connection between an internal device 32 and the transmission line of the terminal 2 and to secure the connection of the transmission line between the terminal 2 and the server 1 in 4 normal state. The internal device 32 includes an inside information transmission part 33 and a password number storage part 34. When a password number is given to the server from the terminal 2, the part 33 receives an abnormality command as well as the password number from the server 1 and collates the received password number with that stored in the password number storage part 34. When the coincidence is confirmed between both password numbers, the part 33 accepts the inside information acquisition request from the terminal 2 and also gives a switch instruction to the switch part 31 to send the inside information to the terminal 2 via the part 31. |
