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Local Area Networks (CSMA/CD baseband) physical layer

2nd edition, March 1984

For the purpose of compatible interconnection of data processing equipment via a local area network using the carrier sense multiple access collision detection technique (CSMA/CD) at 10 Mbit/s, this Standard ECMA-81:

  • defines the services provided at the conceptual interface between the Physical Layer and the Link Layer above it (see section 3);
  • specifies the electrical characteristics of the connection between Data Terminal Equipment and the cable defined in Standard ECMA-80 (see section 5).

Physical frame protocol characteristics are outside the scope of this Standard, and are defined in Standard ECMA-82.

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Technical CommitteeTC23 (this TC is no longer active)


  • ECMA-81, 1st edition, September 1982Download