| 主权项 |
1. An electronic apparatus comprising:
a transmission device including a plurality of free slots configured to detachably connect boards to a transmission line, a dedicated slot connected to all the free slots through the transmission line, and a plurality of identification code generators provided in the respective free slots and providing the boards inserted into the free slots with slot identification codes; a host controller to manage quality of transmission and reception signals of boards connected to the free slots and the dedicated slot of the transmission device; an electronic circuit board to be inserted into one of the free slots, the electronic circuit board including a first transmission/reception circuit board to transmit and receive signals through the transmission line in accordance with transmission/reception parameters, a transmission/reception controller to control transmission/reception processing of the first transmission/reception circuit module, a first parameter setting module to set the transmission/reception parameters in the first transmission/reception circuit module, and a first monitor controller to monitor an operation state of the first transmission/reception circuit module and controls the first parameter setting module; and a switch processing board connected to the dedicated slot, the switch processing board including a plurality of second transmission/reception circuit modules to transmit and receive signals to and from electronic circuit boards inserted into the respective free slots in accordance with the transmission/reception parameters, a switch module to selectively turn on and off transmission/reception processing of each of the second transmission/reception circuit modules, a second parameter setting module to set the transmission/reception parameters in the second transmission/reception circuit modules, and a second monitor controller to monitor an operation state of each of the second transmission/reception circuit modules and control the second parameter setting module, wherein when the electronic circuit board is hot-inserted into one of the free slot; the first monitor controller of the electronic circuit board recognizes the free slot, into which the electronic circuit board has been hot-inserted, by obtaining a slot identification code from the identification code generator corresponding to the free slot into which the electronic circuit board has been hot-inserted, notifies the host control device of start together with slot information recognized by the host control device, monitors a reception state of the first transmission/reception circuit module, causes the first parameter setting module to change the reception parameter of the first transmission/reception circuit module such that the reception state is changed to a predetermined state, and notifies the host control device that the reception state is not changed to the predetermined state when the reception state is not changed to the predetermined state; the host control device instructs the switch processing board to change the transmission parameter, in response to the slot information and start notification, such that the reception state of the electronic circuit board which has issued the notification is changed to the predetermined state; and the second monitor controller of the switch processing board causes the second parameter setting module to change the transmission parameter of the second transmission/reception circuit module, in accordance with an instruction from the host control device. |
