| 摘要 |
A communication system employing a multi-conjunction architecture has a supervising circuit for supervising whether or not a returning signal is received from a destination terminal device in response to a sending signal. When no returning signal is detected within a specific time after the sending signal is transmitted, a communication path used for transmitting the sending signal is isolated from rest of the communication system, or a pseudo returning signal is outputted from the supervising circuit to fix a communication path used for transmitting the sending signal and the pseudo returning signal. As a result, communication paths other than that used for transmitting the sending signal may be used for other communications when the returning signal is not detected for the specific time.
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