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Status Report on New Standards for DTE/DCE Interface Protocols

IP.com Disclosure Number: IPCOM000131443D
Original Publication Date: 1979-Sep-01
Included in the Prior Art Database: 2005-Nov-11
Document File: 11 page(s) / 43K

Publishing Venue

Software Patent Institute

Related People

Harold C. Folts: AUTHOR [+3]

Abstract

[Figure containing following caption omitted: Activity in a number of organizations and countries is leading to a new generation of interface standards for public data networks.] Throughout the world, many national telecommunication administrations and private telecommunication carriers are developing and implementing new digital services for public users. These public data networks will provide efficient and economical service to the user community to support rapidly expanding computer communication requirements as well as many other digital transmission requirements. The services provided will include leased circuits, circuit switching, and packet switching with both virtual call and datagram modes of operation. Accordingly, a new generation of interface standards is required to ensure effective utilization of these emerging services.

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THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

This record contains textual material that is copyright ©; 1979 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Contact the IEEE Computer Society http://www.computer.org/ (714-821-8380) for copies of the complete work that was the source of this textual material and for all use beyond that as a record from the SPI Database.

Status Report on New Standards for DTE/DCE Interface Protocols

Harold C. Folts

National Communications System

(Image Omitted: Activity in a number of organizations and countries is leading to a new generation of interface standards for public data networks.)

Throughout the world, many national telecommunication administrations and private telecommunication carriers are developing and implementing new digital services for public users. These public data networks will provide efficient and economical service to the user community to support rapidly expanding computer communication requirements as well as many other digital transmission requirements. The services provided will include leased circuits, circuit switching, and packet switching with both virtual call and datagram modes of operation. Accordingly, a new generation of interface standards is required to ensure effective utilization of these emerging services.

The center of public data network activity is the International Telegraph and Telephone Consultative Committee, or CCITT, Study Group VII.1 A broad spectrum of interests, from the International Organization for Standardization, or I SO, to national telecommunication administrations and national standards bodies, are also involved. In the US, ANSI -- the American National Standards Institute, EIA -- the Electronic Industries Association, NCS -- the National Communications System of the federal government, and the US CCITT Study Group 4 are the centers of activity and liaison. The direction is toward establishment of internationally accepted standards which can then be adopted in the US for national use. This will result in universal acceptance and application of common standards.

Results of CCITT work are published as Recommendations. Recommendations applicable to data communications are published in the V-series,2 relating to data transmission over the telephone network, and in the X-series,3relating to public data networks. Table 1 is a complete list of X- series CCITT Recommendations applying to all aspects of public data networks. This article covers only those applying to the interface between the user and the network. These are indicated in the table by an asterisk.

Architecture

Data communications interfaces have traditionally been specified between data terminal equipment, or DTE, and data circuit-terminating equipment, or DOE. Figure 1 shows the basic block diagram of typical public data network interconnection. For practical purposes, the DCE is generally considered as part of the network as...