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    TIA-568-B 1-7-2006 Commercial Building Telecommunications Cabling Standard Part 1 - General Requirements Addendum 7 Guidelines for Maintaining Polarity Using Array Connectors Adden.pdf

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    TIA-568-B 1-7-2006 Commercial Building Telecommunications Cabling Standard Part 1 - General Requirements Addendum 7 Guidelines for Maintaining Polarity Using Array Connectors Adden.pdf

    1、 TIA STANDARD ANSI/TIA-568-B.1-7-2006Approved: January 13, 2006 Commercial Building Telecommunications Cabling Standard Part 1 - General Requirements Addendum 7 Guidelines for Maintaining Polarity Using Array ConnectorsTIA-568-B.1-7 (Addendum No.7 to TIA-568-B.1) January 2006 TELECOMMUNICATIONS INDU

    2、STRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industries Alliance Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE TIA E

    3、ngineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the prope

    4、r product for their particular need. The existence of such Standards and Publications shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publicat

    5、ions preclude their voluntary use by Non-TIA members, either domestically or internationally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor do

    6、es it assume any obligation whatever to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety

    7、 and health practices and to determine the applicability of regulatory limitations before its use.(From Standards Proposal No. 3-4425-AD7-C formulated under the cognizance of the TIATR-42.8 Subcommittee on Telecommunications Optical Fiber Cabling Systems). Published by TELECOMMUNICATIONS INDUSTRY AS

    8、SOCIATION Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 U.S.A. PRICE: Please refer to current Catalog of TIA TELECOMMUNICATIONS INDUSTRY ASSOCIATION STANDARDS AND ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) Internatio

    9、nal (303-397-7956) or search online at http:/www.tiaonline.org/standards/search_n_order.cfm All rights reserved Printed in U.S.A. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,

    10、-NOTICE OF COPYRIGHT This document is copyrighted by the TIA. Reproduction of these documents either in hard copy or soft copy (including posting on the web) is prohibited without copyright permission. For copyright permission to reproduce portions of this document, please contact TIA Standards Depa

    11、rtment or go to the TIA website (www.tiaonline.org) for details on how to request permission. Details are located at: http:/www.tiaonline.org/about/faqDetail.cfm?id=18 OR Telecommunications Industry Association Standards (b) there is no assurance that the Document will be approved by any Committee o

    12、f TIA or any other body in its present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing process. The use or practice of contents of this Document may involve the use of intellectual property rights (“IPR”), including pending or issue

    13、d patents, or copyrights, owned by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending patent applications are claimed and called to TIAs attention, a statement from the holder thereof is requested, all in accordance with the Manual

    14、. TIA takes no position with reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or j

    15、udge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respects the Document or its contents. TIA does not enforce or monitor compliance wi

    16、th the contents of the Document. TIA does not certify, inspect, test or otherwise investigate products, designs or services or any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNI

    17、NG THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, ITS MERCHANTABILITY AND ITS NON-INFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENT

    18、ATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL D

    19、AMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BRE

    20、ACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT

    21、 SUCH LIMITATIONS. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 i Guidelines for Maintaining Polarity Using Array Connectors, Addendum 7 to ANSI/TIA/EIA/568B.1

    22、Table of Contents FOREWORD .iv 1 INTRODUCTION . 1 2 SCOPE 2 3 CONNECTIVITY METHODS FOR ESTABLISHING POLARITY 2 3.1 General 2 3.1.1 Descriptions . 2 3.2 Connectivity Method A. 3 3.2.1 Connectivity Method A for Duplex Signals 3 3.2.2 Connectivity Method A for Parallel Signals 5 3.3 Connectivity Method

    23、 B. 7 3.3.1 Connectivity Method B for Duplex Signals 7 3.3.2 Connectivity Method B for Parallel Signals 9 3.4 Connectivity Method C 11 3.4.1 Connectivity Method C for Duplex Signals 11 4 GUIDELINES FOR CONNECTIVITY COMPONENTS . 13 4.1 General 13 4.2 Components for Connectivity Method A 14 4.2.1 Type

    24、-A Array Connector Cables and Patch Cords 14 4.2.2 Type-A Array Adapters 14 4.2.3 Transitions . 15 4.2.4 A-to-B patch cords. 16 4.2.5 A-to-A Patch cords. 16 4.3 Components for Connectivity Method B 17 4.3.1 Type-B Array Connector Cables and Patch Cords 17 4.3.2 Type-B Array Adapters 17 4.3.3 Transit

    25、ions . 17 4.3.4 A-to-B patch cords. 17 4.4 Components for Connectivity Method C 18 4.4.1 Type-C Array Connector Cables . 18 4.4.2 Type-A Array Adapters 18 4.4.3 Transitions . 18 4.4.4 A-to-B patch cords. 18 ANNEX A (INFORMATIVE) References . 19 Copyright Telecommunications Industry Association Provi

    26、ded by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 ii List of Figures Figure 1: Connectivity Method A for Duplex Signals.4 Figure 2: Connectivity Method A for Parallel Signals6 Figure 3: Connectivity Method B for Duplex S

    27、ignals.8 Figure 4: Connectivity Method B for Parallel Signals10 Figure 5: Connectivity Method C for Duplex Signals.12 Figure 6: Type-A Array Connector Cable or Patch Cord (key-up to key-down) 14 Figure 7: Transition .15 Figure 8: A-to-B Duplex Patch Cord16 Figure 9: A-to-A Duplex Patch Cord16 Figure

    28、 10: Type-B Array Connector Cable or Patch Cord (key-up to key-up).17 Figure 11: Type C Array Connector Cable (pair-wise flipped, key-up to key-down) .18 List of tables Table 1: Summary of Components Used for Duplex Signals13 Table 2: Summary of Components Used for Parallel Signals.13 Copyright Tele

    29、communications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 iII FOREWORD (This foreword is not part of this Standard) After ANSI/TIA/EIA-568-B.1 was approved for publication, it was realize

    30、d that there was a need to explain and illustrate the concept of maintaining optical fiber polarity using array connectors. The TIA TR-42 Engineering Committee on Premises Telecommunications Cabling Infrastructure accepted the task and assigned it to the TR-42.8 Subcommittee, Telecommunications Opti

    31、cal Fiber Cabling Systems. The TR-42.8 Subcommittee cooperated with the TR-42.1 Subcommittee on Commercial Building Cabling, which is related to this activity, in preparing this document. TIA standards are developed within the Technical Engineering Committees of the TIA and the standards coordinatin

    32、g committees of the TIA standards board. Members of the committees serve voluntarily and without commission. The companies that they represent are not necessarily members of the TIA. The standards developed within the TIA represent a consensus of the broad expertise on the subject. This expertise co

    33、mes from within the TIA as well as those outside of the TIA that have an expressed interest. The viewpoint expressed at the time that this Telecommunication Systems Bulletin was approved was from the contributors experience and the state of the art at that time. Users are encouraged to verify that t

    34、hey have the latest revision of the standard. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license wit

    35、h EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 1 1 INTRODUCTION To support bi-directional communication systems that use separate optical fibers in each direction, the cabling system must provide correct signal polarity so that the transmitter o

    36、n one end of the channel will connect to the receiver on the other end. Maintaining the correct transmit-to-receive polarity throughout the cabling system is critical for system operation. Following certain cable polarity guidelines when installing the cabling system will simplify channel connectivi

    37、ty. Correct polarity is administered according to the requirements of the depicted methods. Intermixing the components of these methods may result in incorrect polarity. The increasing use of optical connectivity in data communications networks (particularly in areas of highly concentrated equipment

    38、, such as data centers) is driving the need for more compact forms of connectivity. Array connectors are one way of meeting this need. Since the polarity requirements for array connectors extend beyond the commonly deployed duplex (A-B) polarity, additional guidance is provided in this addendum for

    39、maintaining polarity of networks utilizing array connectors. For illustrative purposes, the figures throughout this document depict the MPO array connector and 568SC duplex connector. Other connector types are permitted, provided the fiber ordering arrangement is maintained relative to the plugs key

    40、ing features, as shown in the figures. The figures in this document show connectors labeled with fiber position numbers. This is done for reference only; it is not a requirement of this standard that connectors be labeled with a fiber number. Copyright Telecommunications Industry Association Provide

    41、d by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 2 2 SCOPE This Standard provides guidelines for establishing transmit-to-receive polarity using array connectors. The methods presented in this document provide different o

    42、ptions for implementing polarity. Once a method is selected the details in that method shall be followed. 3 CONNECTIVITY METHODS FOR ESTABLISHING POLARITY 3.1 General All connectivity methods have the same goal: to create an optical path from the transmit port of one device to the receive port of an

    43、other device. Different methods to accomplish this goal may be implemented; however these different methods may not be interoperable. It is recommended that a method be selected in advance and maintained consistently throughout an installation. While many methods are available to establish polarity,

    44、 this Standard outlines sample methods that may be employed. For convenience, these sample methods are referred to as Methods A, B, and C. No preference or priority is implied by this notation. When mating connectors that use alignment pins (such as the MPO and MT-RJ) it is critical that one plug is

    45、 pinned and the other plug is unpinned. The pinned connector is typically located inside the panel. That is, the connector that stays in place is pinned; the connector that is frequently removed the transceiver would be mounted key up as normal. A-to-B Patch CordsType-B Array Connector CableExample

    46、Optical PathCopyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 9 3.3.2 Connectivity Method B for Parallel Signals Implementation of Connectivity Method B for parallel

    47、 signals is shown in Figure 4. When connecting parallel signals, the Type-B backbone (composed of one or many Type-B array connector cables mated in Type-B adapters) is connected on each end to a patch panel. Type-B array patch cords are then used to connect the patch panel ports to their respective

    48、 parallel transceiver ports. Guidelines for the construction of the cabling components used to implement Method B for parallel signals are given in Section 4.3. When MPO connectors are used in Connectivity Method B they must be flat polished. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-7 10 Figure 4: Connectivity Method B for Parallel Signals NOTE 1. This Connectivity Method will also work with other parallel optics devices. Example Optical PathType-B


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