| 摘要 |
A multiplexing device for multiplexing a sub-transmission channel signal into a main transmission channel signal by burying the sub-transmission channel signal in an idle signal between packets. By a sub-transmission channel signal add-drop mechanism, the sub-transmission channel signal is multiplexed by substitution into a part of the idle signal of the main transmission channel signal. By the sub-transmission channel signal add-drop mechanism, moreover, the signal into which the sub-transmission channel signal is multiplexed is separated into the sub-transmission channel signal and the main transmission channel signal, and the idle signal of the main transmission channel signal is restored.
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