Showing papers on "Physical layer published in 1983"
1 Dec 1983
TL;DR: This paper starts with an overview of Physical Layer documents, continues with a detailed discussion of architectural service specifications, and concludes with a discussion of related standards.
Abstract: Among the more important new works on the Physical Layer are perhaps the CCITT Draft Recommendation X.211, Physical Layer Service Definition, and the emerging Physical Layer protocols of the ISDN's (Integrated Services Digital Networks). Discussed along with these new developments, which came in time after the definition of the OSI model, are some of the widely used classic older standards and specifications, such as X.21, V.24, and V.54, which do not always fit nicely within the model layers but which deal substantively with the Physical Layer. This paper starts with an overview of Physical Layer documents, continues with-a detailed discussion of architectural service specifications, and concludes with a discussion of related standards.
4 citations
TL;DR: A hierarchical local area network architecture is proposed for laboratory process control automation and the contention-free multiframe control sequences supported by the physical layer provide a facility to implement a selective flow control, which is applied independently for each logical link.
4 citations
1 Dec 1983
TL;DR: OSI will be achieved gradually by evolution over the next decade, and by the end of the decade, open systems information exchange will be commonplace in North America, Europe, and Japan.
Abstract: Open Systems Interconnection (OSI) will be achieved gradually by evolution over the next decade. The initial standards required to achieve simple systems interconnection for file transfer and message handling will be finalized by the end of 1984. Government and industry are cooperating to provide the single family of standards which users need. Computer manufacturers and network providers are planning to provide evolutionary growth paths to OSI for their users. A major U.S. national demonstration of OSI is planned for 1984. By the end of the decade, open systems information exchange will be commonplace in North America, Europe, and Japan.
1 citations
1 Oct 1983
TL;DR: Details for a network design to connect the Apollo DOMAIN network with the VAX system are discussed in this paper and of particular interest are the transport, presentation, and application layers.
Abstract: Specifications for a network design to connect the Apollo DOMAIN network with the VAX system are discussed in this paper. Three networking approaches were considered which represent three distinct chronological stages in the evolution of computer communications. Based on a comparison of data transfer rate and the installation cost among these three alternatives, the LAN, represented by the Ethernet, was recommended as the connecting hardware.The OSI Reference Model was used as a starting basis to discuss protocol issues to be built for the chosen LAN. Of particular interest are the transport, presentation, and application layers. The transport layer was designed to perform functions of the network and session layers in the OSI model. The presentation layer incorporated a text mapping algorithm to convert incompatible characters in filenames created on the VAX versus those on the Apollo. The application layer was designed with the capability to send and receive files between these two systems.
1 citations