| 摘要 |
The present invention relates to a digital time switch having equipemnt in several parallel working planes. The digital time switch is included in a telecommunication system which operates with pulse code modulation and time multiplex. The invention is intended to solve the technical problem of detecting and accurately localizing errors or faults in a multi-plane unit. In a multi-plane unit comprising three electrically identical planes each having at least a first section of electrical circuitry and final section of electrical circuitry, each section has an input and an output, each section is connected in series within each plane, and each section is electrically identical to corresponding sections in the other planes. A data signal is processed in corresponding sections of each plane, and a processed data signal is generated for each data signal. Each processed data signal, or alternatively each data signal, is compressed in corresponding sections of each plane, and a compressed data signal is generated for each. The compressed data signals from corresponding sections are compared, and an alarm is generated when a difference is detected. Preferrably, a prepared data signal is generated which represents a majority of the processed data signals from each final section.
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