CABLE PCM SYSTEM FOR RAILWAY COMMUNICATIONS

The PCM system applied to telecommunications circuits of JNR is described. To use such a system between major points, it is necessary to have the ability to drop and insert channels at intermediate stations and to have repeaters spaced at 5-km intervals. To meet such requirements new equipment and cable were developed. A new method for evaluating transmission quality of the PCM system was developed. PCM is applied to circuits of less than 100 km with 12 to 24 channels.

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  • Corporate Authors:

    JAPANESE NATIONAL RAILWAYS

    TOKYO,   Japan 
  • Authors:
    • Kawase, S
    • Saito, M
    • Hisano, K
  • Publication Date: 1978-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00178908
  • Record Type: Publication
  • Source Agency: JAPANESE NATIONAL RAILWAYS
  • Files: TRIS
  • Created Date: Jul 29 1978 12:00AM