Monitor and control system in transmission device

1. Field of the Invention A monitor and control system for transmission devices, by which mounting dimensions can be reduced, consumption power can be lowered and the cost can be reduced by reducing a number of connectors connecting units and reducing a number of drivers and receiver ICs is provided. In the monitor and control system for transmission devices, each having a monitor and control package, and plural monitored and controlled packages connected to the monitor and control package through serial buses, the monitor and control package monitors the plural monitored and controlled packages. The monitor and control package has a controller, which generates parallel address and data, and a first converter, which converts the parallel address and data generated by the controller into serial address and data, and each of the plural monitored and controlled packages has a second converter, which converts the serial address and data transmitted from the first converter of the monitor and control package through the serial buses into parallel address and data.