IEEE-802.5T-2000.pdf
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1、 The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2000 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 10 March 2000. Printed in the United States of America. Print: ISBN 0-7381-1743-9 SH94
2、755 PDF: ISBN 0-7381-1744-7 SS94755 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. IEEE Std 802.5t-2000 (Amendment to ANSI/IEEE Std 802.5, 1998 Edition; ANSI/IEEE Std 802.5r, 1998 Editi
3、on; and ANSI/IEEE Std 802.5j, 1998 Edition) Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specifi c requirements Amendment to Part 5: Token Ring Access Method and Physical Layer Specifi cations Sponsor LAN/MAN Standards Commit
4、tee of the IEEE Computer Society Approved 13 January 2000 IEEE-SA Standards Board Abstract: This supplement specifies the changes required to ANSI/IEEE Std 802.5, 1998 Edition, (Base standard) and ANSI/IEEE 802.5r, 1998 Edition, and ANSI/IEEE Std 802.5j, 1998 Edition, (Amendment 1 standard) to suppo
5、rt 100 Mbit/s Dedicated Token Ring (DTR) operation. The Base standard, together with the Amendment 1 standard, specifies shared and dedicated (point-to-point) Token Ring operation at both 4 Mbit/s and 16 Mbit/s using either the TKP Access Protocol or the TXI Access Protocol. This supplement extends
6、Token Ring operation to 100 Mbit/s for the DTR C- Port and Station using the TXI Access Protocol. Extensions to the medium access control (MAC) have been made to accommodate the requirements for high media rates (100 Mbit/s and above). Keywords: data processing interconnection, dedicated token ring,
7、 fi ll duplex operation, local area network (LAN), medium access control (MAC), 100 Mbit/s operation, token ring Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008
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20、cting inquiries into the legal validity or scope of those patents that are brought to its attention. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 02:45:14 MDT
21、No reproduction or networking permitted without license from IHS -,-,- Copyright 2000 IEEE. All rights reserved. iii Introduction (This introduction is not part of IEEE Std 802.5t-2000, Information technologyTelecommunications and information exchange between systemsLocal and metropolitan area netwo
22、rksSpecifi c requirementsAmendment to Part 5: Token Ring Access Method and Physical Layer Specifi cations.) This standard is part of a family of standards for local and metropolitan area networks. The relationship between this standard and other members of the family is shown below. (The numbers in
23、the fi gure refer to IEEE standard numbers.) This family of standards deals with the Physical and Data Link layers as defi ned by the International Organiza- tion for Standardization (ISO) Open Systems Interconnection (OSI) Basic Reference Model (ISO/IEC 7498-1:1994). The access standards defi ne se
24、ven types of medium access technologies and associated physi- cal media, each appropriate for particular applications or system objectives. Other types are under investigation. The standards defi ning the access technologies are as follows: IEEE Std 802 Overview and Architecture. This standard provi
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