ANSI-INCITS-278-1997-R2007.pdf
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1、ANSI INCITS 278-1997 (R2002) (formerly ANSI X3.278-1997) for Information Technology Fibre Distributed Data Interface (FDDI) Physical Layer Repeater Protocol (PHY-REP) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing,
2、 Bernie Not for Resale, 08/07/2007 01:04:32 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 08/07/2007 01:04:32 MDTNo
3、 reproduction or networking permitted without license from IHS -,-,- ANSI X3.278-1997 American National Standard for Information Technology Fibre Distributed Data Interface (FDDI) Physical Layer Repeater Protocol (PHY-REP) Secretariat Information Technology Industry Council Approved February 6, 1997
4、 American National Standards Institute, Inc. Abstract This standard is intended for use in a high-performance multi-node network. This protocol is designed to be effective at 100 megabits per second using a token ring architecture and fibre optics or other transmission media over distances of severa
5、l kilometers in extent. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 08/07/2007 01:04:32 MDTNo reproduction or networking permitted without license from IHS -,-,- American National Standar
6、d Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement
7、has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of America
8、n National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards
9、 Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Req
10、uests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action
11、be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. CAUTION: The developers of this standard have requested that holders of pa
12、tents that may be required for the implementation of the standard disclose such patents to the publisher. However, neither the developers nor the publisher have undertaken a patent search in order to identify which, if any, patents may apply to this standard. As of the date of publication of this st
13、andard, following calls for the identification of patents that may be required for the implementation of the standard, notice of one or more such claims has been received. By publication of this standard, no position is taken with respect to the validity of this claim or of any rights in connection
14、therewith. The known patent holder(s) has (have), however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be obtained from the publisher. No further patent se
15、arch is conducted by the developer or publisher in respect to any standard it processes. No representation is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. Published by American National Standards Institute 11 West 42nd Street,
16、New York, New York 10036 Copyright 1997 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005.
17、Printed in the United States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 08/07/2007 01:04:32 MDTNo reproduction or networking permitted without license from IHS -,-,- i Forewor
18、d .ii 1Scope 1 2Normative references .2 3Definitions3 4Conventions and abbreviations.5 4.1Conventions.5 4.2Abbreviations .6 5General description 7 6Services.8 6.1PHY-to-PHY services .9 6.1.1 PH_UNITDATA.request 9 6.1.2 PH_UNITDATA.indication.9 6.1.3 PH_INVALID.indication.10 6.2PHY-to-PMD services.10
19、 6.3PHY-to-SMT control services10 6.3.1 SM_PH_CONTROL.request10 7Facilities 11 7.1Coding .11 7.2Symbol set .11 7.3Line states .11 (7.3.1 through 7.3.6 can be found in PHY-2) 7.3.7 Noise Line State (NLS).12 8Operation.12 (8.1 through 8.6 can be found in PHY-2) 8.7Line State Detection function12 (8.8
20、can be found in PHY-2) 8.9Repeat Filter function .13 8.9.1 State RF0: IDLE 14 8.9.2 State RF1: REPEAT 14 8.9.3 State RF2: FILTER15 Figures 1Structure of FDDI repeaters2 2Peer Physical Connection example.8 6Repeat Filter state diagram.16 Contents1) Page 1) The clauses, subclauses, and figures are num
21、bered to match the corresponding clauses, subclauses, and figures in the PHY-2 document. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 08/07/2007 01:04:32 MDTNo reproduction or networking p
22、ermitted without license from IHS -,-,- ii Foreword (This foreword is not part of American National Standard X3.278-1997.) The Fibre Distributed Data Interface (FDDI) is intended for use in a high- performance general purpose multi-node network and is designed for effi- cient operation with a peak d
23、ata rate of 100 Mbit/s. It uses a Token Ring architecture with optical fibre as the transmission medium. FDDI provides for hundreds of nodes operating over an extent of tens of kilometers. The Physical Layer Repeater Protocol (PHY-REP) specifies the upper sub- layer of the Physical Layer for the FDD
24、I. As such, it presents the specifica- tions and services provided for conforming FDDI attachment devices. PHY-REP specification provides additional requirements beyond those of the PHY protocol. When the set of basic FDDI standards is completed it will also include the following standards: a) A Med
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