ISO/IEC 8802-5:1998/Amd 1:1998

Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 5: Token ring access method and physical layer specifications — Amendment 1: Dedicated token ring operation and fibre optic media

Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseaux locaux et métropolitains — Exigences spécifiques — Partie 5: Méthode d'accès par anneau à jeton et spécifications pour la couche physique — Amendement 1: Opération par dédicace d'anneau à jeton et milieux en fibres optiques

General Information

• Status: Withdrawn
• Publication Date: 30-Sep-1998
• Withdrawal Date: 30-Sep-1998
• ICS: 35.110 - Networking
• Technical Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Drafting Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 23-Apr-2019
• Completion Date: 14-Feb-2026

Relations

• Amends: ISO/IEC 8802-5:1998 - Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 5: Token ring access method and physical layer specifications
• Effective Date: 06-Jun-2022
• Child: ISO/IEC 8802-5:1998 - Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 5: Token ring access method and physical layer specifications
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL
ISOAEC
STANDARD
8802-5
ANSIIIEEE
Std 802.5
Third edition
1998-09- 15
AMENDMENT 1
1998009- 15
Information technology -
Telecommunications and information
exchange betweeri Systems - Local and
metropolitan area networks - Specific
requirements -
Part 5:
Token ring access method and physical layer
specifications
AMENDMENT 1: Dedicated token ring
Operation and fibre optic media
Technologies de Unformation - T6kScommunications et khange
d ’information entre systemes - Rkseaux locaux et urbains - Exigences
spkifiques -
Partie 5: Mefhode d ’acc&s par anneau 2 jeton et spkifications pour Ia
couche physique
AMENDEMENT 1: Operation par dedicace d ’anneau ti jeton et milieux en
fibres optiques
Reference number
ISO/1 EC 8802-5: 1998IAmd. 1: 1998(E)
ANWIEEE
Std 8023 and 802.5j, 1998 edition

International Standard ISO/IEC 8802~5:1998/Amd.l:l998(E)
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized System for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to
national bodies for voting. Publication as an International Standard requires approval by at least 75 % of
the national bodies casting a vote.
Amendment 1 to ISO/IEC 8802~5:1998 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 6, Telecommunications and information exchange between
Systems.
International Organization for Standardization/International Electrotechnical Commission
Case postale 56 l CH- 1211 Geneve 20 l Switzerland
ii
ISO/IEC 8802-5 : 1998/Amd. 1: 1998
ANWIEEE Std 80234997 and 802.5j-1997,1998 Edition
(Supplements to ANSVIEEE Std 802.5, 1998 Edition)
Information technology-
Telecommunications and information
exchange between systems-
Local and metropolitan area networks-
Specific requirements-
Part 5:Token ring access method and
physical layer specifications
Amendment 1: Dedicated token ring
Operation and fibre optic media
Sponsor
LAN MAN Standards Committee
of the
IEEE Computer Society
Abstract: This amendment to Local and Metropolitan Area Network Standard, ISO/IEC 8802-
5 : 1998, is part of a family of local area network (LAN) Standards dealing with the physical and data
link layers as defined by the ISO/IEC Open Systems Interconnection Basic Reference Model. The
requirements for dedicated token ring (DTR) Operation are specified, including the changes and
additions to the Medium Access Control (MAC) layer to provide for an additional full-duplex mode of
Operation (switching), and for interconnection of shared LAN Segments to switch ports. Also specified
are the characteristics of a fibre optic interface for connecting a 4 Mbit/s or 16 Mbit/s token ring sta-
tion to the trunk coupling unit (KU) of a token ring, including Station, Port, and channel require-
ments. Fibre optic trunk signaling recommendations are also made.
Keywords: data processing interconnection, dedicated token ring, fibre optic media, full duplex
Operation, insertion key, local area network (LAN), medium access control (MAC), token ring
The Institute of Electrical and Electronics Engineers, Inc.
345 East 47th Street, New York, NY 10017-2394, USA
Copyright 0 1998 by the Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 1998. This printing is by the International Organization for Standardization with special per-
mission of the Institute of Electrical and Electronics Engineers, Inc. Printed in Geneva, Switzerland.
ISBN 0-7381-0236-9
No part of this publication may be reproduced in any form, in an electronie retrieval System or othenuise, without the Prior
written Permission of the publisher.

Foreword to ISO/IEC 8802-5 : 1998/Amd. 1: 1998
This International Standard is part of a family of International Standards for Local and Metropolitan Area
Networks. The relationship between this International Standard and the other members of the family is
shown below. (The numbers in the figure refer to ISO/IEC Standard numbers.)
8802-1 Overview
8802-2 Logical Link Control
Data
Link
8802-3 8802-5 8802-6 8802-9 8802-11 8802-12
Layer
Medium Medium Medium Medium Medium Medium
Access Access Access Access Access Access
-------- -------- r -------- -------- --------
Ph ysical
8802-3 8802-5 8802-6 8802-9 8802-11 8802-12
Physical Layer
Physical Physical Physical Physical Physical
L
This family of International Standards deals with the Physical and Data Link layers as defined by the ISO/
IEC Open Systems Interconnection (OSI) Basic Reference Model (ISO/IEC 7498-1 : 1994). The access
Standards define seven types of medium access technologies and associated physical media, each appropriate
for particular applications or System objectives. Other types are under investigation.
The International Standards defining the access technologies are as follows:
ISO/IEC 8802-3, utilizing carrier sense multiple access with collision detection (CSMAKD) as the
access method.
b) ISO/IEC 8802-4, utilizing token passing bus as the access method.
ISO/IEC 8802-5, utilizing token passing ring as the access method.
C)
d) ISO/IEC 8802-6, utilizing distributed queuing dual bus as the access method.
ISO/IEC 8802-9, a unified access method offering integrated Services for backbone networks.
e>
f) ISO/IEC DIS 8802-11, a wireless LAN utilizing carrier sense multiple access with collision avoid-
ante (CSMAKA) as the access method.
ISO/IEC DIS 8802- 12, utilizing Demand Priority as the access method.
g)
ISO/IEC TR 8802- 1, Overview of Local Area Network Standards, provides an overview of the series of ISO/
IEC 8 802 Standards.
ISO/IEC 8802-2, Logical Link Control, is used in conjunction with the medium access Standards to provide
the data link layer Service to network layer protocols.
ISO/IEC 15802-1, Medium Access Control (MAC) Service de$nition, specifies the characteristics of the com-
mon MAC Service provided by all IEEE 802 LAN MACs. The Service is defined in terms of primitives that
tan be passed between peer Service users, their Parameters, their interrelationship and valid sequences, and
the associated events of the Service.
ISO/IEC 15802-2, LAN/MAN Management, defines an OS1 management-compatible architecture, and ser-
vices and protocol elements for use in a LAN/MAN environment for performing remote management.
ISOAEC 10038, Media Access Control (MAC) bridges, specifies an architecture and protocol for the intercon-
nection of IEEE 802 LANs below the level of the logical link control protocol (to be renumbered 15802-3).
ISO/IEC 15802-4, System Load Protocol, specifies a set of Services and protocol for those aspects of man-
agement concerned with the loading of Systems on IEEE 802 LANs.
ISO/IEC 15802-5, Remote Media Access Control (MAC} bridging, specifies extensions for the interconnec-
tion, using non-LAN communication technologies, of geographically separated IEEE 802 LANs below the
level of the logical link control protocol.
. . .
Copyright 0 1998 IEEE. All rights reserved.
AhlSI/IEEE Std 802.5r-19 ’97 and 802.51~1997,1998 Edition
IEEE Standards documents are developed within the IEEE Societies and the Standards Coordinating Com-
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Use of an IEEE Standard is wholly voluntary. The existente of an IEEE Standard does not imply that there
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Comments for revision of IEEE Standards are welcome from any interested Party, regardless of membership
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Interpretations: Occasionally questions may arise regarding the meaning of portions of Standards as they
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Comments on Standards and requests for interpretations should be addressed to:
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Note: Attention is called to the possibility that implementation of this Standard may
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iv Copyright 0 1998’ IEEE. All rights reserved.

Introduction tp ANSMEEE Std 802.W1997 and 802.534 997,1998
Edition
(This introdukion is not a part of ANSUIEEE Stds 802.5-1997 and-802Sj-1997, or of ISO/IEC 8802-5 : 1998/Amd. 1:
1998.)
This Standard is part of a family of Standards for local and metropolitan area networks. The relationship
between the Standard and other members of the family is shown below. (The numbers in the figure refer to
IEEE Standard numbers.)
802.2 LOGICAL LINK CONTROL
DATA
802.1 BRIDGING
LINK
LAYER
802.5 802.6 802.9 802.11 802.12
MEDIUM MEDIUM MEDIUM MEDIUM MEDIUM
ACCESS ACCESS ACCESS ACCESS ACCESS
802.5 802.6 802.9 802.11 802.12
PHYSICAL
PHYSICAL
PHYSICAL PHYSICAL PHYSICAL PHYSICAL
LAYER
* Formerly IEEE Std 802.1A.
This family of Standards deals with the Physical and Data Link layers as defined by the International Organi-
zation for Standardization (ISO) Open Systems Interconnection (OSI) Basic Reference Model (ISO/IEC
7498-1 : 1994). The access Standards define seven types of medium access technologies and associated
physical media, each appropriate for particular applications or System objectives. Other types are under
investigation.
The Standards defining the technologies noted above are as follows:
Ovewiew and Architecture. This Standard provides an overview to the fam-
l IEEE Std 802
ily of IEEE 802 Standards.
l ANWIEEE Std 802.lß LAN/MAN Management. Defines an OS1 management-compatible architec-
ture, and Services and protocol elements for use in a LAN/MAN environ-
and 802.lk
ment for performing remote management.
[ISO/IEC 15802-21
l ANSUIEEE Std 802.1D Media Access Control (MAC) Bridges. Specifies an architecture and protocol
[ISO/IEC 100381 for the interconnection of IEEE 802 LANs below the MAC Service boundary.
l ANSUIEEE Std 802.1E System Load Protocol. Specifies a set of Services and protocol for those aspects
[ISO/IEC 15802-41 of management concerned with the loading of Systems on IEEE 802 LANs.
l ANSUIEEE Std 802.1F Common DeJinitions and Procedures for IEEE 802 Management Information
l ANSUIEEE Std 802.1 G Remote Media Access Control (MAC) Bridging. Specifies extensions for the
[ISO/IEC 15802-51 interconnection, using non-LAN communication technologies, of geographically
separated IEEE 802 LANs below the level of the logical link control protocol.
l ANSUIEEE Std 802.2 Logical Link Control
[ISO/IEC 8802-21
Copyright 0 1998 IEEE. All rights reserved. V

l
CSMAKD Access Method and Physical Layer Specifications
ANWIEEE Std 802.3
[ISO/IEC 8802-31
Token Passing Bus Access Method and Physical Layer Specifications
ANWIEEE Std 802.4
[ISO/IEC 8802-41
Token Ring Access Method and Physical Layer Specifications
ANSVIEEE Std 802.5
[ISO/IEC 8802-51
Distributed Queue Dual Bus Access Method and Physical Layer Specifi-
ANWIEEE Std 802.6
[ISO/IEC 8802-61 cations
Integrated Services (IS) LAN Interface at the Medium Access Control
ANSIIIEEE Std 802.9
(MAC) and Physical (PHY) Layers
[ISO/IEC 8802-91
Interoperable LAN/MAN Security
ANWIEEE Std 802.10
ANWIEEE Std 802.11 Wireless LAN Medium Access Control (MAC) and Physical Layer SpeciJi-
[ISOKIEC DIS 8802-1 l] cations
ANWIEEE Std 802.12 Demand Priority Access Method, Physical Layer and Repeater SpeciJi-
[ISO/IEC DIS 8802-121 cations
In addition to the family of Standards, the following is a recommended practice for a common Physical
Layer technology:
l IEEE Std 802.7 IEEE Recommended Practice for Broadband Local Area Networks
The following additional working group has authorized Standards projects under development:
Standard Protocol for Cable-TV Based Broadband Communication Network
l IEEE 802.14
Conformance test methodology
An additional Standards series, identified by the number 1802, has been established to identify the conform-
ante test methodology documents for the 802 family of Standards. Thus the conformance test documents for
802.3 are numbered 1802.3.
ANSVIEEE Std 802.5~~1997 and 802.5j-1997,1998 Edition [ISO/lEC 8802-5 : 1998/
Amd. 1: 19981
This amendment to the IEEE 802.5 token ring Standard extends the capability of token ring by defining and
specifying dedicated token ring Operation, a new class of token ring adapters that tan operate in full duplex
mode, and a new C-Port for attachment of stations to the LAN. This Standard provides for the interconnec-
tion of shared and dedicated token ring LAN Segments via the newly defined C-Port. Full backward and for-
ward compatibility of hardware is provided for, with newly defined C-Ports able to detect and interoperate
with both legacy token ring adapters, and with adapters designed to this new Standard. Additionally, the
newly defined adapters tan operate in full duplex mode when connected to a C-Port, and tan operate in clas-
sic or shared mode when attached to a shared concentrator port as defined in the base Standard.
This amendment also defines Operation over fibre optic media, upgrading the “Trial Use” Optical fibre stan-
dard to full-use Status. Also described are recommendations for fibre trunk interconnection.
vi Copyright 0 1998 IEEE. All rights reserved.

Participants
The following is a list of those who were members of the IEEE 802.5 Working Group when IEEE Std
802.%- 1997 was approved:
Robert D. Love, Chair and Editor-in-Chief
Jim Carlo, Technical Editor
Neil Jarvis, Technical Editor
Michael Siegel, Technical Editor
Kenneth T. Wilson, Technical Editor
Jeremy Curtis George Lin Bob ROSS
William Douglass Joseph Mazor Tony Rowell
Paul Gessert Kelly P McClellan Bill S arles
Martin Gurthrie John Messenger Steve Scandalis
Sharam Hakimi John E. Montague Showi-min Shen
Michael Hanrahan Ivan Oakley Kevin G. Smith
Ivar Jeppesen Syou-Chin Peng Trevor Warwiek
Allen Kasey Kirk Preiss David W. Wilson
Ken Kutzler Edward C. Wong
The following persons were on the balloting committee of IEEE Std 802Sr- 1997:
William B. Adams Richard J. Iliff Vikram Punj
Don Aelmore Neil A. Jarvis Ivan Reede
Paul D. Amer Henry D. Keen John P Riganati
Jack S. Andresen Peter M. Kelly Edouard Y. Rocher
Frederic Bauchot Gary C. Kessler James W. Romlein
Manuel J. Betantor* Yongbum Kirn Floyd E. ROSS
Kathleen L. Briggs Henrieous Koeman Michael Salzman
Peter K. Campbell S tephen Barton Kruger Stephen Scandalis
James T. Carlo William G. Lane Norman Schneidewind
David E. Carlson Lanse M. Leach Rich Seifert
Alan M. Chambers Walter Levy Lee A. Sendelbach
Robert S. Crowder Randolph S. Little Donald A. Sheppard
Christos Douligeris Robert D. Love Joseph S. Skorupa
Sourav K. Dutta Bennett Meyer
Fred J. Strauss
Paul S. Eastman Richard H. Miller Efstathios D. Sykas
Philip H. Enslow David S. Millman Patricia Thaler
Changxin Fan Warren Monroe
Geoffrey 0. Thompson
John W. Fendrich John E. Montague Robert C. Tripi
Mark R. M. Ferguson David J. Morris Mark-Rene Uchida
Harvey A. Freeman Wayne D. Moyers James Vorhies
Robert J. Gagliano Charles Oestereicher Yun-Che Wang
Gautarn Garai Joerg Ottensmeyer Raymond P. Wenig
Juli0 Gonzalez Sanz Roger Pandanda Paul A. Willis
Martin Guthrie Ronald C. Petersen David W. Wilson
Kenneth C. Heck Thomas L. Phinney Qian-li Yang
*Deceased
Copyright 0 1998 IEEE. All rights reserved.

Participants
The following is a list of those who were members of the IEEE 802.5 Working Group when IEEE Std
802Sj-1997 was approved:
Robert D. Love, Chair
Paul Gessert, Technical Editor
George Lin Tony Rowell
Jim Carlo
Joseph Mazor Bill Sarles
Jeremy Curtis
Kelly P McClellan Steve Scandalis
William Douglass
John Messenger Showi-min Shen
Martin Gurthrie
John E. Montague Michael Siegel
Sharam Hakimi
Ivan Oakley Kevin G. Smith
Michael Hanrahan
Syou-Chin Peng Trevor Warwiek
Neil Jarvi s
Kirk Preiss David W. Wilson
Ivar Jeppesen
Bob ROSS Kenneth T. Wilson
Allen Kasey
Edward C. Wong
Ken Kutzler
The following persons were on the balloting committee of IEEE Std 802Sj-1997:
William B. Adams Kenneth C, Heck Ivan Reede
Don Aelmore Richard J. Iliff Edouard Y. Rocher
Jack S. Andresen Neil A. Jarvis James W. Romlein
Peter M. Kelly Floyd E. ROSS
Kit Athul
William E. Ayen Gar-y C. Kessler Michael Salzman
Frederic Bauchot Yongbum Kirn F. Williams Sarles
J. Paul Benson, Jr. Stephen Barton Kruger Stephen Scandalis
Kathleen L. Briggs Lanse M. Leach Norman Schneidewind
Peter K. Campbell Walter Lev y Lee A. Sendelbach
James T. Carlo Randolph S. Little Donald A. Sheppard
David E. Carlson Robert D. Love Joseph S. Skorupa
Robert S. Crowder Bennett Meyer Rosemary Slager
Christos Douligeris Richard H. Miller Fred J. Strauss
Sourav K. Dutta David S. Millman Efstathios D. Sykas
Paul S. Eastman Warren Monroe Geoffrey 0. Thompson
John E. Montague Robert C. Tripi
Changxin Fan
John W. Fendrich David J. Morris Mark-Rene Uchida
Harvey A. Freeman James R. Moulton Emmanuel Van Lil
Robert J. Gagliano Wayne D. Moyers James Vorhies
Gautarn Garai Charles Oestereicher Yun-Che Wang
Paul Gessert Roger Pandanda Raymond P. Wenig
Juli0 Gonzalez Sanz Lucy W. Person Paul A. Willis
Martin Guthrie Ronald C. Petersen David W. Wilson
Delon Hanson Thomas L. Phinney Qian-li Yang
. . .
Vi11 Copyright 0 1998 IEEE. All rights reserved.

When the IEEE Standards Board approved IEEE Std 802.5r and IEEE Std 802.53 on 16 September 1997, it
had the following membership:
Richard J. Holleman, Vke Chair
Donald C. Loughry, Chair
Andrew G. Salem, Secretary
Louis-Francois Pau
Lowell Johnson
Clyde R. Camp
Gerald H. Peterson
Robert Kennelly
Stephen L. Diamond
John W. Pope
E. G. “Al” Kiener
Harold E. Epstein
Jose R. Ramos
Joseph L. Koepfingert
Donald C. Fleckenstein
Ronald H. Reimer
Stephen R. Lambert
Jay Forster?
Ingo Rüsch
Lawrence V. McCall
Thomas F. Garrity
John S. Ryan
Donald N. Heirman L. Bruce McClung
Chee Kiow Tan
Marco W. Migliaro
Jim Isaak
Howard L. Wolfman
Ben C. Johnson
-tMember Emeritus
Also included are the following nonvoting IEEE Standards Board liaisons:
Satish K. Aggarwal
Alan H. Cookson
Kristin Dittmann
IEEE Standards Project Editor
IEEE Std 802.5r-1997 was approved by the American National Standards Institute on 2 June 1998. IEEE Std
802.5j-1997 was approved by the American National Standards Institute on 15 April 1998.
1x
Copyright 0 1998 IEEE. All rights reserved.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Changes to clauses 1 and 2 of ISO/IEC 8802-5 : 1998
...........................................................................................................................................
1.1 Scope
...................................................................................................................
1.2 Normative references
...................................................................................................................................
1.3 Definitions
.......................................................................................................
1.5 Abbreviations and acronyms
................................................................................
1.6 Conformance requirements-classic Station
......................................................................
1.7 Conformance requirements-classic concentrator
..................................................................................................
1.8 DTR conformance requirements
............................................................................
1.9 Fibre optic media conformance requirements
.........................................................................................
2.5 Physical structure of a DTR network
..........................................................................................
2.6 Station and C-Port operating modes
................................................................................................................
9. Dedicated token ring (DTR)
..............................................................................
9.1 DTR TXI and TKP access protocol support
.................................................................................
9.2 Station TXI access protocol specification
....................................................................
9.3 C-Port join and TXI access protocol specification
..........................................................
9.4 C-Port in Port mode TKP access protocol specification
........................................
9.5 C-Port Station Emulation mode TKP access protocol specification
......................................................................
9.6 DTR Station TKP access protocol specification
.......................................................................
9.7 C-Port specific components and specifications
10. DTR formats and facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1 Formats .
10.2 Field descriptions .
10.3 MAC frames .
10.4 System timers .
10.5 Policy fIags and variables .
10.6 Error counters .
...............................................................................................
11. DTR Station and C-Port management
11 .l DTR Station management .
11.2 C-Port management .
........................................................................................
11.3 Management information definitions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~.
12. DTU interface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*.
12.1 DTU-PMAC interface Service specification
13. Fibre optic media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*.
13.1 Clause numbering .
13.2 Overview .
............................................................................................. 286
13.7 Station attachment specifications
Annex 13.A (normative) Alternate fibres . 294
............................................ 295
Annex 13.B (informative) FOTCU trunk signaling recommendations
Copyright 0 1998 IEEE. All rights resetved.
X
ISO/IEC 8802-5 : 1998/Amd. 1 : 1998(E)
DEDICATED TOKEN RING OPERATION AND FIBRE OPTIC MEDIA ANSVIEEE Std 8023 and 802.5j, 1998 Edition
Annexes
AS Major capabilities . 298
A.10 PICS proforma for DTR Station using the TXI access protocol-DTRSTXI::M. . .301
A.11 PICS proforma for DTR Station using the TKP access protocol DTRSTKP::M . .305
A.12 PICS proforma for C-Port in Port mode using the TXI access protocol DTRPTXI::M . 307
A.13 PICS proforma for C-Port in Port mode using the TKP access protocol DTRPTKP::M. . .310
A.14 PICS proforma for DTR C-Port in Station Emulation mode using the TXI access
protocol-DTRPSETXI::M . 311
A.15 PICS proforma for C-Port operating in Station Emulation mode using the TKP access
protocol DTRPSETKP::M . 313
Annex K (informative) DTR concentrator functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Annex L (informative) DTR Station and C-Port in Station Emulation mode using the
TXI access protocol- Join, Transmit, and Monitor low-level FSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
Annex M (informative) C-Port in Port mode using the TXI and TKP access protocol-
C-Port Join, Transmit, and Monitor low-level FSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
Annex N (informative) C-Port in Port mode using the TKP access protocol-
Transmit and Monitor low-level FSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376
Annex 0 (informative) Channel considerations for 16 Mbit/s DTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Annex Q (informative) DTR Station using the TKP access protocol-Join, Transmit, and
Monitor low-level FSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*. 381
Annex R (informative) C-Port in Station Emulation mode using the TKP access protocol-
Join, Transmit, and Monitor low-level FSMs . . . . . . . . . . . . . . . . .*. 385
Annex S (informative) Clause 4 TKP access protocol deletions-C-Port in Port mode
and in Station Emulation mode using the TKP access protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
Annex T (informative) Autodetection protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399
Copyright 0 1998 IEEE. AH rights reserved. XI

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Information technology-
Telecommunications and information
exchange between systems-
Local and metropolitan area networks-
Specific requirements-
Part ’% Token ring access method and physical
layer specifications
Amendment 1: Dedicated token ring Operation
and fibre optic media
1. Changes to clauses 1 and 2 of ISOIIEC 8802-5 : 1998
This Standard, an amendment to the existing text of the ISO/IEC 8802-5 : 1998, specifies the requirements
for dedicated token ring stations and ports. It also specifies characteristics of a fibre optic interface for
connecting a 4 or 16 Mbit/s token ring Station to the trunk coupling unit (TCU) of a token ring. The text
assumes all material, including references, acronyms, and definitions contained in the base text. The clause
and subclause numbering in the following clauses corresponds to the clause and subclause numbering to be
expected in a combined document (i.e., when these additions are incorporated). Unaffected clauses are
skipped.
Dedicated token ring (DTR) defines a new protocol for full-duplex token ring Operation, sometimes
referred to as “switching.” This amendment requires that all conformant DTR ports and stations be able to
operate compatibly with the preexisting Standard in a shared token ring environment.
The specification of token ring Operation over fibre optic media, as defined within this amendment,
replaces and renders obsolete ISO/IEC TR 11802-4 : 1994, Fibre optic Station attachment.
1-l Scope
Add the following to 1 .l after item q), and Change the period after item q) to a semicolon:
r) Defines the dedicated token ring (DTR) media access protocols, including finite state machines
(FSMs) and state tables (clause 9);
s) Defines the frame formats and MAC frames, timers, and error counters for the DTR Station and
DTR C-Port (clause 10);
Copyright 0 1998 IEEE. All rights reserved,

lSO/lEC 8802-5 : 1998/Amd. 1 : 1998(E)
ANSVIEEE Std 802.5r and 802.5j, 1998 Edition LOCAL AND METROPOLITAN AREA NETWORKS:
t) Defines the DTR Station and C-Port Management (clause 11);
u) Provides informative information on the functional description of the DTR concentrator (annex K);
v) Provides informative information on the low-level FSMs of the DTR Station and the C-Port in
Station Emulation mode using the TXI access protocol (annex L);
w)
Provides informative information on the low-level FSMs of the C-Port in Port mode using the TXI
and TKP access protocol (annex M);
x) Provides informative information on the low-level FSMs of the C-Port in Port mode using the TKP
access protocol (annex N);
y) Provides informative information on channel considerations for 16 Mbit/s DTR (annex 0);
z) Provides normative information on the BER criteria for lobe media testing (annex P);
aa) Provides informative information on the low-level FSMs of the DTR Station using the TKP access
protocol (annex Q);
bb) Provides informative information on the low-level FSMs of the C-Port in Station Emulation mode
using the TKP access protocol (annex R);
cc) Provides informative information on modifications to clause 4 TKP access protocol when used to
support C-Port Operation (annex S);
dd) Provides informative information on an optional method for DTR concentrator autodetection
(annex T);
ee) Defines the functional, electrical, and Optical characteristics of a fibre optic interface for connecting
a 4 or 16 Mbit/s token ring Station to the trunk coupling unit (TCU) of a token ring;
ff) Provides informative guidance for connecting fibre trunk cables between trunk coupling units;
gg) Describes signaling provisions for bypass of the Station from the ring and self-test capabilities.
Add the following items as subjects for future study after item g):
h) Speed negotiation process.
i) Low-power protocols for managing stations and C-Ports when the MAC is suspended and the
hardware is in a low-power mode.
1.2 Normative references
Add the following normative references to 1.2 of ISOIIEC 8802-5 : 1998:
IEC 60793-2 : 1989, Optical fibres- Part 2: Product specifications.
IETF RFC 1573, K. McCloghrie and F. Kastenholz, “Evolution of the Interfaces Group of MIB-11,”
January 20, 1994.’
IETF RFC 1748, K. McCloghrie and E. Decker, “IEEE 802.5 MIB using SMIv2,” December 29, 1994.
IETF RFC 1902, J. Case, K. McCloghrie, M. Rose, and S. Waldbusser, “Structure of Management
Information Base for Version 2 of the Simple Network Management Protocol (SNMPv2).” January 1996.
IETF RFC 1903, J. Case, K. McCloghrie, M. Rose, and S. Waldbusser, “Textual conventions for Version 2
of the Simple Network Management Protocol (SNMPv2).” January 1996.
IETF RFC 1907, J. Case, K. McCloghrie, M. Rose, and S. Waldbusser, “Management Information Base for
Version 2 of the Simple Network Management Protocol (SNMPv2).” January 1996.
IOnline copies of IETF RFCs are available via FT ’P from the InterNIC Directory and Database Services server, ds.internic.net, as
rfc/rfc####.txt or rfc/rfc####.ps (#### is the RFC number without leading zeroes).
2 Copyright 0 1998 IEEE. All rights resqved.

ISO/IEC 8802-5 : 1998/Amd. 1 : l998(E)
DEDICATED TOKEN RING OPERATION AND FIBRE OPTIC MEDIA ANSVIEEE Std 802.3 and 802.5j, 1998 Edition
Fibre Distributed Data Interface (FDDI)---Part
ISO/IEC 9314-3 : 1990, Information processing systems-
3: Physical Layer Medium Dependent (PMD).
-Open Systems Interconnection-Common management
ISO/IEC 9595 : 1991, Information technology
information Service definition.
ISO/IEC 9596-1 : 1991, Information technology-Open Systems Interconnection-Common management
information protocol-Part 1: Specification.
ISO/IEC 10040 : 1992, Information technology-Open Systems Interconnection-Systems management
overview.
ISO/IEC 10165-1 : 1993, Information technology-Open Systems Interconnection-Management
Information Services-Structure of management information: Management Information Model.
ISO/IEC 10165-4 : 1992, Information technology-Open Systems Interconnection-Structure of manage-
ment information-Part 4: Guidelines for the definition of managed objects.
ISO/IEC 10165-5 : 1994, Information technology-Open Systems Interconnection-Structure of manage-
ment information: Generic management information.
1.3 Definitions
Modify the following deflnition:
1.3.80 verified frame: A valid frame as defined in 4.3.2, ‘addressed to the Station, for which the informa-
tion field has met the validity requirements as specified in 3.3.5.2 or 10.3.6.5 as appropriate.
This amendment adds new definitions to the base Standard. Dejinitions will be resorted and renumbered
in a future edition incorporating amendments into the base Standard.
Add the following to 1.3:
1.3.1 bypass: The state of the fibre optic Station attachment when the fibre optic trunk coupling unit
(FOTCU) does not route the Station Signals onto the trunk ring. Instead, the Station Signals are returned to
the Station for lobe testing, and trunk Signals continue along the trunk.
1.3.2 ’bypass key: A signaling Pattern sent by a fibre optic Station to leave the ring and enter the BYPASS
state. This Pattern consists of a low light-level detected at the fibre optic trunk coupling unit (FOTCU) for
greater than 4 ms. (See 13.7.2.2.)
1.3.3 classic concentrator: Concentrator Operation supporting the classic Station described in clause 8.
1.3.4 classic Station: A Station the operates in the token passing mode only.
1.3.5 classic token ring: Token ring architecture according to clauses 3 and 4. Provides shared bandwidth
to multiple nodes on a Single token ring.
1.3.6 conformance test interface connector: A connector defined for the purpose of conformance testing.
Copyright 0 1998 IEEE. All rights resewed.

ISO/IEC 8802-5 : 1998/Amd. 1 : 1998(E)
LOCAL AND METROPOLITAN AREA NETWORKS:
ANSI/IEEE Std 802.5r and 802.5j, 1998 Edition
1.3.7 C-Port: A concentrator gort in a dedicated token ring concentrator.
1.3.8 data transfer unit (DTU): The entity in the dedicated token ring (DTR) concentrator that provides
frame forwarding between C-Ports and the data transfer Service (if there is one).
1.3.9 dedicated token ring (DTR): Token ring architecture according to clauses 3, 9, and 10. Provides
shared bandwidth to multiple node count classic token rings or Single classic stations, and enhanced full-
duplex dedicated bandwidth to Single stations attached to a DTR concentrator.
1.3.10 dedicated token ring (DTR) concentrator: A concentrator with C-Ports that provide shared and
dedicated connectivity domains to attaching stations.
1.3.11 dedicated token ring (DTR) Station: A Station that supports the token passing protocol (TKP) and
transmit immediate protocol (TXI) access protocols specified in clauses 3, 4, 9, and 10. Note: Within this
document, “Station” when capitalized is used to indicate that the entity may be either a data Station, or a C-
Port in Station Emulation mode.
1.3.12 fibre: A filament-shaped Optical waveguide made of dielectric materials.
1.3.13 fibre optic cable: A cable containing one or more Optical fibres compatible with specifications in
13.7.2.5.
1.3.14 fibre optic channel: The data path from any transmitting station ’s fibre optic medium interface
connection (FMIC) or transmitting concentrator ’s FMIC to the next receiving FMIC.
13.15 fibre optic interface (FOI): The interface between a station ’s physical (PHY) layer and the Optical
medium. It is bounded on one side by the medium interface connector (MIC) or PHY layer I/O interface,
and on the other by the fibre optic medium interface connection (FMIC).
1.3.16 fibre optic medium interface connection (FMIC): The mechanical and Optical interface between
the Station or fibre optic interface and the fibre optic cable. This is a duplex Optical port at which confor-
mance testing is performed.
13.17 fibre optic Station (FODTE): A compliant token ring Station with a fibre optic interface (FOI) as
described in this Standard.
1.3.18 fibre optic trunk coupling unit (FOTCU): A physical device that enables a fibre optic Station to
connect to a trunk cable. The FOTCU contains the means for inserting the fibre optic Station into the ring,
or conversely, bypassing the fibre optic Station. Syrt: fibre optic concentrator lobe Port.
1.3.19 full-duplex Operation: Use of the transmit immediate protocol (TXI) access protocol where
data transfer between a dedicated token ring (DTR) Station and C-Port may occur simultaneously and
bidirectionallv.
1.3.20 insert: The fibre optic Station transmit sign als will be routed to the next downstream Station in the
ring, and input Signals will be routed from the next upstrea .m Station i n the ring.
13.21 insertion: A signaling Pattern sent by a fibre optic Station to request to join the ring (INSERT). This
Pattern consists of an alternating Pattern of normal data Signals and low light-level Signals. See 13.7.2.2.
1.3.22 insertion key echo: The return of the insertion key to the Station by the fibre optic trunk coupling
unit (FOTCU). See 13.7.2.2.
1.3.23 lobe: A set of transmission elements in the data path between a station ’s transmitter and its own
receiver when the Station is in the Bypass state.
4 Copyright 0 1998 IEEE. All rights reserved.

ISO/IEC 8802-5 : 1998/Amd. 1 : 1998(E)
DEDICATED TOKEN RING OPERATION AND FIBRE OPTIC MEDIA ANSVIEEE Std 802.5r and 802.5j, 1998 Edition
1.3.24 management routing interface (MRI): The management interface between the C-Port Medium
Access Controls (PMAC) and the dedicated token ring (DTR) concentrator management.
1.3.25 Phantom drive: A technique where a dc power Source is superimposed on the transmit and receive
Signal pairs in a transparent or “Phantom” fashion (7.2.1) such that its application does not affect the data
bearing Signals on either pair. For classic token ring, this dc power Source is normally applied to request a
concentrator to insert a Station into the ring. For dedicated token ring, this dc power Source is used as part
of the registration process.
1.3.26 Port mode: The Operation of a C-Port when configured as a port that connects to the media and
waits for the Start of Station registration.
1.3.27 registration: The process whereby both the dedicated token ring (DTR) Station and the C-Port
exchange information after the DTR Station exits the Bypass state as the result of a connection request.
1.3.28 Station Emulation mode: The Operation of a C-Port when configured to emulate a Station using the
token passing protocol (TKP) or transmit immediate protocol (TXI) access protocol,
1.3.29 token passing protocol (TKP): Token ring protocol wherein normal data transmission occurs upon
the Capture of a token.
1.3.30 token passing protocol (TKP) access protocol: The classic token ring protocol specified in clauses
3 and 4 wherein normal data transmission occurs upon the Capture of a token.
1.3.31 transmit immediate protocol (TXI) access protocol: The access protocol specified in clause 9
where the protocol does not require the Station to gain access to a token in Order to transmit information.
Data transmission uses
...