| 摘要 |
PURPOSE:To connect an operator, an extension and a line wire without installing an operator trunk and an operator trunk control device, by connecting plural trunk devices and plural operators by using a main switch and a trunk device. CONSTITUTION:In case when incoming is executed to a sound signal operator ATT through a switching equipment from a line wire use channel M, and a call is executed to an extension SUB, the incoming from a line wire is received first through a channel 3b in a main switch 3, a trunk device 4, and a trunk control device 5. Subsequently, it is connected to the operator ATT through a channel 3d, a PS, and an operator interface device 6 by a control of CPU 1, and thereafter, three of the operator ATT, the extension SUB, and the line wire become a call state thorough a channel 3c. Also, by an operation of the operator ATT, a control and an instruction of the CPU 1 are executed, and a channel 3a, the extension SUB, and the channel M are connected directly. In this way, plural trunk devices 4 and plural operator ATTs are connected by using the switch 3 and the device 4, and even if the operator trunk and the control device are not provided, the operator, the extension and the line wire can be connected. |
