| 摘要 |
<p>A communication system of cascaded devices with a backup function includes a line adapter with multiple inputs and multiple outputs. Wherein, the communication devices of adjacent levels are cascaded through the line adapter, in each communication device, the port of an active main control board which is connected to the line adapter is open, and the port of a standby main control board is closed. The present invention also discloses two Active/Standby switchover methods applied in the above-mentioned communication system, by performing on-off control upon a communication device's interfaces connected to the line adapter, it is guaranteed that the communication devices cascaded by this communication device does not need to perform Active/Standby switchover in main control boards. By applying the present invention, the system's Active/Standby reliability and stability can be improved besides the implementing costs can be reduced.</p> |
