| 摘要 |
For operational monitoring in PCM links, when a redundant code is used, the possibility is employed of establishing faults by violations of the code rule. In the recoding of the transmission signals in intermediate regenerators of the transmission link, it is necessary to provide a code rule violation checking device for each individual regenerator, which results in an increase in the expense in the regenerators. The code rule violation checking device disclosed is included in the pulse regenerator so that only one additional RS flip-flop, two time delay elements and two gate arrangements are necessary for this purpose. The invention may be employed in PCM links having transmission signals represented in the AMI code and, in particular, in transmission links employing element speeds of a few hundred Mbit/s.
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