| 摘要 |
<p>A communication obstacle detection device is provided with a frame reception unit (optical connector (702), O/E conversion unit (703) and A/D conversion unit (704), as well as LAN connector (705) and main signal processing unit (706)) for receiving frames from an ONU (2) and a host network, a frame storage unit (710) which temporarily stores frames, a frame transmission unit (713) for transmitting the received frames to the frame storage unit (710), a state monitoring unit (712) which outputs an alert notification in accordance with the state of the communication obstacle detection device itself and the ONU (2), an internal state retaining unit (708) the internal state of which transitions in accordance with a notification that includes the alert notification, and an overwrite processing assessment unit (709) which instructs the frame transmission unit (713) to halt transmission of frames in accordance with the internal state.</p> |
