| 摘要 |
A data transmission system, in particular a time division multiplex (TDM) pulse code modulation (PCM) system, in which a continuous sequence of individual signals is transmitted includes a transmission path extending between two end stations which is divided into a plurality of sections and in which a monitoring signal is interposed at regular intervals into the sequence of transmitted signals. At the start of each transmission section, as viewed in the direction of transmission, the monitoring signal is either reconstructed or reinserted in the correct form independently of whether it has been received at this station in a disturbed form or in the correct form by way of the preceding transmission section. The monitoring signal is a pulse signal containing a plurality of bits. At the start of each transmission section only some of the bits of the monitoring signal are reconstructed or reinserted in the correct form, while the remaining uncorrected bits of the monitoring signal are employed for fault rate analysis and/or for message and alarm functions. |
