| 摘要 |
PURPOSE:To eliminate delay in the transmission of information to an switch board interface equipment by controlling a cord circuit talking trunk based on cord circuit control information sent already from a central processing unit after a switch board controller receives a reply signal. CONSTITUTION:The siwtch board controller 9 stores the relay information of a cord circuit talking trunk 10 to a memory, and display and lamp informa tion relating to the cord circuit state in a cord circuit talking trunk 10 to be connected to a cord line 14 of a remote switch board 13 are sent in the route of a switch board control circuit 18 from the siwtch board control circuit 9 to display the information onto a display device 16 and a display panel 17. When the display is finished, the circuit 18 returns a predetermined reply signal according to the transmission procedure via a remote switch board interface device 12 and a data link 20 to the switch board controller 9. When the control ler 9 receives the reply signal, relay control information of the trunk 10 received by the central processing unit 7 is extracted for relay control. |
