| 摘要 |
PURPOSE:To realize an inexpensive optical network system, by changing a high- speed signal into a parallel signal in a circuit speed, or providing a function to restore the parallel signal to the high-speed signal on a network interface. CONSTITUTION:For instance, a camera interface board 5 gives a circuit request to an exchange control part 6 via a system bus 3 when the picture data of a camera 8 is transmitted to a monitor 9. If a 96Mb/s band is needed for transmission of picture data, the part 6 checks whether three idle circuits are available from a circuit state table in an RAM. If three idle circuit are available, the part 6 registers the allotted circuit of the board 5 to the circuit state table and informs the name of the corresponding receiver, the name of the allotted circuit, etc. to a control part 1. At the same time, the control part 6 controls a switch of a circuit switching part 7 and connects the switch to an L port connected to the allotted circuit board 5. While the exchange control part of the part 1 connects the circuit switch part to the interface board of a monitor 9 based on the received information, and the connection end information is sent back to a control part 2. Then the transmission of pictures is started. |
