X.25 Packet-Switched Network Layer

  • Antony Rybczynski
Part of the Applications of Communications Theory book series (ACTH)


The 1970s heralded the beginning of the development of public data networks (PDNs), offering packet switching services, e.g., Canada: Datapac, France: Transpac, USA: Telenet. The commercial viability of these networks hinged largely on the development and adoption of standard access protocols. These standards would facilitate the connection of varying types of data terminal equipments (DTEs) to the various public networks being developed as well as facilitate international internetworking.


Data Packet Incoming Call Virtual Circuit Call Setup Call Request 
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  1. [1]
    P. T. Kelly, “Public packet switched data networks, international plans and standards,” Proc. IEEE, vol. 66, No. 11, November 1987, pp. 1539–1549.CrossRefGoogle Scholar
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    A. M. Rybczynski and J. D. Palframan, “A common X.25 interface to public data networks,” Comput. Networks J., vol. 4, No. 3, pp. 97–110, July 1980.Google Scholar
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    Z. Drukarch et al., “X.25: The universal packet network interface,” Proc. Int. Conf. Comput. Commun., Atlanta, October 1980.Google Scholar
  4. [4]
    A. M. Rybczynski, “Packet switching in the 1990s,” Proc. of Globecom 87, Tokyo, October 1987, pp. 1406–1409.Google Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Antony Rybczynski
    • 1
  1. 1.Data Networks Division Northern TelecomOttawaCanada

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