| 摘要 |
PURPOSE:To mix voice communication signals simply by cascade-connecting the necessary number of voice mixers having a similar configuration. CONSTITUTION:Voice communication signals inputted to an input ports (white circles) of I/O ports 1-IOP-3-IOP are mixed in a mixing part AM1 and distributed to the output ports (black dots) of the port 2-IOP. Voice communication signals inputted to the input ports of the ports 1-IOP, 2-IOP are mixed in a mixing part AM2 and outputted from the output port of the port 3-IOP. Voice communication signals inputted to the input ports of the ports 2-IOP, 3-IOP are mixed in a mixing part AM3 and outputted from the output port of the port 1-IOP. A conference telephone system is used by connecting the mixers having said configuration. Namely, talking among three subscribers uses only one mixer. In case of talking among four subscribers or more, the I/O ports of the ports 1-IOP, 3-IOP are cascade-connected and the subscriber connected to the port 2-IOP of the device can execute conference talking each other. |
