ANSI-X3.263-1995.pdf

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ANSI X3.263-1995 for Information Technology – Fibre Distributed Data Interface (FDDI) – Token Ring Twisted Pair Physical Layer Medium Dependent (TP-PMD) 5 9 9 1 - 3 6 2 . 3 X I S N A American National Standards Institute 11 West 42nd Street New York, New York 10036

ANSI X3.263-1995 ® American National Standard for Information Technology – Fibre Distributed Data Interface (FDDI) – Token Ring Twisted Pair Physical Layer Medium Dependent (TP-PMD) Secretariat Information Technology Industry Council Approved September 25, 1995 American National Standards Institute, Inc. Abstract The described Twisted Pair Physical Layer Medium Dependent Standard is intended for use in a high-performance multistation network. This protocol is designed to be effective at 100 megabits per second using a token ring architecture and twisted pair cabling as the transmission medium over link distances of up to one hundred meters.

American National Standard 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 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 American 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 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. Requests 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 CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time.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 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. Published by American National Standards Institute 11 West 42nd Street, New York, New York 10036 Copyright 1995 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. Printed in the United States of America

Contents Page Foreword.................................................................................................iii 1 2 3 4 5 6 7 8 Scope ..............................................................................................1 Normative references .......................................................................2 Definitions ........................................................................................3 Conventions and abbreviations .........................................................5 4.1 4.2 Conventions............................................................................5 Abbreviations..........................................................................6 General description ..........................................................................7 5.1 5.2 Ring overview .........................................................................7 Environment ...........................................................................9 Services .........................................................................................11 6.1 6.2 TP-PMD-to-PHY services ......................................................11 TP-PMD-to-SMT services ......................................................14 Media independent operations ........................................................16 7.1 7.2 Transmit function ..................................................................17 Receive function ...................................................................20 Media interface connector specifications .........................................23 8.1 Media interface connectors ...................................................24 Testing recommendations .....................................................27 8.2 Station labeling .....................................................................27 8.3 8.4 Isolation requirements...........................................................27 9 Media signal interface.....................................................................28 9.1 9.2 Active Output Interface..........................................................28 Active Input Interface specifications ......................................31 10 Interface signals .............................................................................33 10.1 Receiver ...............................................................................33 10.2 Transmitter ...........................................................................36 11 Cable plant interface specification ..................................................36 11.1 Cable plant specification .......................................................36 11.2 Crossover function ................................................................38 11.3 Connectors, cords, and cross-connect equipment .................38 Tables 1 2 3 4 UTP-MIC contact assignments ........................................................24 STP-MIC contact assignments ........................................................26 Twisted Pair Active Output Interface characteristics ........................31 Signal_Detect summary .................................................................35 Figures 1 FDDI links and connections ..............................................................7 i

Page FDDI topology example ....................................................................8 FDDI representative distribution environment example ....................10 Dual attachment TP-PMD services..................................................12 TP-PMD functions ..........................................................................16 Encoder state diagram....................................................................19 Decoder state diagram....................................................................21 Example of a UTP-MIC receptacle ..................................................24 Example of a UTP-MIC plug............................................................25 2 3 4 5 6 7 8 9 10 Example of a STP-MIC receptacle ..................................................26 11 Example of a STP-MIC plug ............................................................26 12 Active output interface overshoot ....................................................29 13 Inductance measurement technique ................................................30 14 Active output interface duty cycle distortion.....................................31 15 Differential input signals .................................................................32 16 Common mode rejection .................................................................33 17 Signal_Detect assertion threshold...................................................34 18 Signal_Detect threshold and timing .................................................35 19 Mask of permitted cable plant reference insertion loss and reference crosstalk attenuation ................................................37 Annexes Test procedures .............................................................................39 Electrical interface considerations...................................................48 Example of system jitter allocation ..................................................50 Labeling considerations ..................................................................52 Alternative cable plant usage ..........................................................54 Impedance and insertion loss deviation...........................................55 Stream cipher scrambling function ..................................................56 Equipment cabling in a structured cabling context ...........................64 Common mode cable termination ....................................................65 Twisted Pair Active Output Interface template .................................67 Bibliography ...................................................................................68 A B C D E F G H I J K ii

Foreword (This foreword is not part of American National Standard X3.263-1995.) The Fibre Distributed Data Interface (FDDI) is intended for use in a high- performance general purpose multi-station network and is designed for efficient operation with a peak data rate of 100 Mbit/s. It uses a Token Ring architecture with optical fibre as the primary transmission medium. FDDI provides for hundreds of stations operating over an extent of tens of kilometers. The FDDI Token ring twisted pair physical layer medium dependent (TP- PMD) standard specifies the lower sublayer of the Physical Layer for FDDI for operation on twisted pair cables. As such it specifies the power levels and characteristics of the transmitter and receiver, and the interface signal requirements including jitter. TP-PMD also specifies the connector details, the requirements of conforming FDDI cable plants, and the permissible bit error rates. TP-PMD is designed to operate with one twisted pair in each direction. TP-PMD is one of a set of American National Standard alternative PMDs being developed, or already developed, for FDDI. This set includes the original PMD for multimode fibre, the Single Mode Fibre PMD (SMF-PMD), and the Low Cost Fibre PMD (LCF-PMD). The set of FDDI standards, when completed, will include the following standards: a) A FDDI PART: Token ring physical layer protocol (PHY), which speci- fies the upper sublayer of the physical layer for the FDDI, including the data encode/decode, framing and clocking, as well as the elasticity buffer, smoothing, and repeat filter functions; b) A FDDI PART: Token ring media access control (MAC),which speci- fies the lower sublayer of the data link layer for FDDI, including the access to the medium, addressing, data checking, and data framing; c) A FDDI PART: Token ring station management (SMT), which speci- fies the local portion of the system management application process for FDDI, including the control required for proper operation of a station in an FDDI ring. American National Standards for FDDI MAC (ANSI X3.139-1987), FDDI PHY (ANSI X3.148-1988), and FDDI PMD (ANSI X3.166-1990) have been approved and published. In addition, FDDI standards are being processed as International Standards by standards committee ISO/IEC JTC 1/SC 25. International standards for FDDI PHY, FDDI MAC, and FDDI PMD (ISO 9314-1:1989, 9314-2:1989 and ISO/IEC 9314-3:1990, respectively) have also been published. An extension to the basic FDDI is now in the X3 approval process. The standard FDDI HRC, commonly known as FDDI-II, will extend the capabili- ty of FDDI to handle isochronous data streams at a multiplicity of data rates. A standard for an enhancement to MAC is in process. This standard will be referred to as FDDI MAC-2 when it is necessary to distinguish it from the approved FDDI MAC standard ANSI X3.139-1988. Changes to be consid- ered for this update of the FDDI MAC standard include those identified in footnotes in the published standard on MAC as areas that the standards iii

committee intended to change as well as changes that may be required for any proposed extensions to FDDI, such as FDDI-II or MAC Bridging. A similar enhancement project is in process for the FDDI PHY standard. This standard will be referred to as FDDI PHY-2. The text and format of this FDDI TP-PMD standard is based upon the International FDDI PMD standard ISO/IEC 9314-3. As a consequence, cer- tain conventions, references, spelling, and units commonly used in International Standards have been used in this standard. These are differ- ent from those normally used in American National Standards, but are not expected to cause difficulty in understanding or use. This standard contains 11 annexes. Annex A is normative and is consid- ered part of this standard. Annexes B–K are for information only. Requests for interpretation, suggestions for improvement or addenda, or defect reports are welcome. They should be sent to the ITI, 1250 Eye Street, NW, Washington, DC 20005. This standard was processed and approved for submittal to ANSI by the Accredited Standards Committee on Information Technology, X3. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, the X3 Committee had the following members: James D. Converse, Chair Donald C. Loughry, Vice-Chair Joanne Flanagan, Secretary Organization Represented American Nuclear Society..................................................Geraldine C. Main Sally Hartzell (Alt.) Name of Representative AMP, Inc. ..........................................................................Edward Kelly Charles Brill (Alt.) Apple Computer, Inc. .........................................................David K. Michael AT&T Global Information Systems .....................................Robert K. Kramer Thomas F. Frost (Alt.) Bull HN Information Systems, Inc.......................................William M. George, Jr. Compaq Computers...........................................................Mitesh Patel Digital Equipment Corporation ...........................................Scott K. Jameson Richard Hovey (Alt.) Eastman Kodak Company..................................................James D. Converse Michael Nier (Alt.) Hewlett-Packard ................................................................Donald C. Loughry Hitachi America, Ltd. .........................................................John Neumann Hughes Aircraft Company ..................................................Harold Zebrack IBM Corporation ................................................................Joel Urman Karen Higgenbottom (Alt.) Kei Yamashita (Alt.) Mary Anne Lawler (Alt.) Institute for Certification of Computer Professionals (ICCP) .......................................................Kenneth Zemrowski National Communications Systems ....................................Dennis Bodson National Institute of Standards and Technology..................Michael D. Hogan Neville & Associates ..........................................................Carlton Neville Northern Telecom, Inc. ......................................................Mel Woinsky Granger Kelley (Alt.) James H. Burrows (Alt.) John Pugh (Alt.) Recognition Technology Users Association ........................Herbert P. Schantz Gerald Farmer (Alt.) Share, Inc. ........................................................................Gary Ainsworth David Thewlis (Alt.) iv

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