TIA标准 TIA-568-C.0-2009.pdf

TIA-568-C.0February 2009 Generic Telecommunications Cabling for Customer Premises ANSI/TIA-568-C.0-2009 APPROVED: FEBRUARY 2, 2009 -,-,- NOTICE TIA Engineering 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 proper 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 Publications 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. 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THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. -,-,- ANSI/TIA-568-C.0 Generic Telecommunications Cabling for Customer Premises Table of Contents FOREWORD . v 1 SCOPE 1 2 NORMATIVE REFERENCES 1 3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE . 2 3.1 General . 2 3.2 Definitions . 2 3.3 Acronyms and abbreviations 5 3.4 Units of measure 6 4 TELECOMMUNICATIONS CABLING SYSTEM STRUCTURE 8 4.1 General . 8 4.2 Topology . 9 4.2.1 General 9 4.2.2 Accommodation of non-star configurations . 9 4.3 Equipment outlets . 9 4.4 Distributors . 9 4.5 Cabling Subsystem 1 10 4.6 Cabling Subsystem 2 and Cabling Subsystem 3 . 10 4.7 Recognized cabling 10 4.8 Cabling lengths . 11 4.8.1 General 11 4.8.2 Demarcation point 11 4.9 Grounding and bonding considerations 11 5 CABLING INSTALLATION REQUIREMENTS 12 5.1 General . 12 5.2 Environmental compatibility 12 5.3 Balanced twisted-pair cabling . 12 5.3.1 Maximum pulling tension . 12 5.3.2 Minimum bend radius . 12 5.3.2.1 Cable . 12 5.3.2.2 Cord cable . 12 5.3.3 Cable termination . 12 5.3.3.1 General 12 5.3.3.2 Eight-position modular jack pin-pair assignments . 13 5.3.4 Cords and jumpers . 14 5.3.5 Grounding and bonding requirements for screened cabling 14 5.3.6 Separation of power and telecommunications cables . 14 5.3.7 Electrostatic discharge . 14 5.4 Optical fiber cabling 15 5.4.1 Minimum bend radius and maximum pulling tension . 15 5.4.2 Cord cable 15 5.4.3 Polarity . 15 6 CABLING TRANSMISSION PERFORMANCE AND TEST REQUIREMENTS 16 6.1 General . 16 6.2 Field-test instrument calibration . 16 6.3 Balanced twisted-pair transmission performance and test requirements 16 6.4 Optical fiber transmission performance and test requirements 16 6.4.1 General 16 6.4.2 Field-test instruments . 16 i ANSI/TIA-568-C.0 6.4.2.1 Multimode 16 6.4.2.2 Single-mode 17 6.4.3 Link segment performance measurements . 17 6.4.3.1 General 17 6.4.3.2 Cabling Subsystem 1 link segment . 17 6.4.3.3 Cabling Subsystem 2 and Cabling Subsystem 3 link segment . 17 6.4.3.4 Link attenuation allowance calculation 17 ANNEX A (NORMATIVE) CENTRALIZED OPTICAL FIBER CABLING 18 A.1 General . 18 A.2 Implementation . 18 ANNEX B (NORMATIVE) MAINTAINING OPTICAL FIBER POLARITY 19 B.1 General . 19 B.2 Component descriptions . 19 B.3 Duplex polarity systems 19 B.3.1 General 19 B.3.2 Consecutive-fiber positioning . 20 B.3.3 Reverse-pair positioning 22 B.4 Array polarity systems 23 B.4.1 General 23 B.4.2 Connectivity Method A . 25 B.4.2.1 Connectivity Method A for duplex signals . 25 B.4.2.2 Connectivity Method A for parallel signals 26 B.4.3 Connectivity Method B . 27 B.4.3.1 General 27 B.4.3.2 Connectivity Method B for duplex signals . 27 B.4.3.3 Connectivity Method B for parallel signals 28 B.4.4 Connectivity Method C for duplex signals 29 ANNEX C (INFORMATIVE) MULTI-TENANT CABLING SUBSYSTEM 2 AND CABLING SUBSYSTEM 3 30 C.1 General . 30 C.2 Existing Cabling Subsystem 2, Cabling Subsystem 3, or both cabling 30 C.3 New Cabling Subsystem 2, Cabling Subsystem 3, or both cabling . 30 ANNEX D (INFORMATIVE) APPLICATION SUPPORT INFORMATION 31 D.1 General . 31 D.2 Balanced twisted-pair cabling supportable distances 31 D.3 Optical fiber cabling supportable distances 32 ANNEX E (INFORMATIVE) GUIDELINES FOR FIELD-TESTING LENGTH, LOSS AND POLARITY OF OPTICAL FIBER CABLING 34 E.1 General . 34 E.2 Test criteria . 34 E.2.1 General 34 E.2.2 Tier 1 34 E.2.3 Tier 2 (Optional) . 35 E.3 Test instruments . 35 E.3.1 General 35 E.3.2 Optical loss test set 35 E.3.3 Visible light source . 35 E.3.4 Optical time domain reflectometer . 36 E.4 Precautions to measurement testing 36 E.5 Test measurement methods . 37 E.5.1 Optical link attenuation . 37 ii ANSI/TIA-568-C.0 E.5.1.1 General 37 E.5.1.2 Verifying test jumper quality 37 E.5.1.3 Multimode 38 E.5.1.3.1 General 38 E.5.1.3.2 Setting the reference 39 E.5.1.3.3 Measuring link attenuation . 39 E.5.1.4 Single-mode 40 E.5.1.4.1 General 40 E.5.1.4.2 Setting the reference 40 E.5.1.4.3 Measuring link attenuation . 41 E.5.1.5 Calculating link attenuation . 41 E.5.2 Length 41 E.5.3 Polarity . 41 E.5.4 OTDR trace 42 E.6 Documentation . 43 E.7 Mandrel wrap usage for multimode fiber testing with an OLTS LED source . 43 E.8 Interpreting length, attenuation rate, and insertion loss from an OTDR trace 45 E.8.1 Length 45 E.8.2 Attenuation rate 46 E.8.3 Insertion loss 47 ANNEX F (INFORMATIVE) ENVIRONMENTAL CLASSIFICATIONS . 48 ANNEX G (INFORMATIVE) BIBLIOGRAPHY 51 List of Tables Table 1 Maximum pair un-twist for category cable termination . 13 Table 2 Maximum tensile load and minimum bend radius . 15 Table 3 Acceptable mandrel diameters for common multimode cable types (five wraps) 16 Table 4 Summary of components used for duplex signals 24 Table 5 Summary of components used for parallel signals . 24 Table 6 Maximum supportable distances for balanced twisted-pair cabling applications . 31 Table 7 Maximum supportable distances and attenuation for optical fiber applications by fiber type . 32 Table 8 M, I, C, E environmental conditions 48 List of Figures Figure 1 Illustrative relationship between the TIA-568-C Series and other relevant TIA standards . vi Figure 2 Functional elements that comprise a generic cabling system . 8 Figure 3 Illustration of interconnection and cross-connection 10 Figure 4 Front view of eight position jack pin/pair assignments (T568A) 13 Figure 5 Front view of optional eight-position jack pin/pair assignment (T568B) 14 Figure 6 Illustration of centralized optical fiber cabling 18 Figure 7 A-to-B duplex optical fiber patch cord 19 Figure 8 Consecutive-fiber positioning shown with horizontally mounted hardware . 20 Figure 9 Consecutive-fiber positioning cabling system example shown with horizontally mounted hardware 21 Figure 10 Reverse-pair positioning shown with horizontally mounted hardware . 22 Figure 11 Reverse-pair positioning cabling system example shown with horizontally mounted hardware . 23 Figure 12 Connectivity Method A for duplex signals 25 Figure 13 Connectivity Method A for parallel signals . 26 Figure 14 Connectivity Method B for duplex signals 27 Figure 15 Connectivity Method B for parallel signals . 28 Figure 16 Connectivity Method C for duplex signals . 29 iii ANSI/TIA-568-C.0 Figure 17 Example of OLTS reference measurement (P1) with one test jumper (multimode) 38 Figure 18 Example of a measurement (P2) when verifying OLTS test jumpers (multimode) 38 Figure 19 Example of OLTS reference measurement (P1) with one test jumper (multimode) 39 Figure 20 Example of a multimode link attenuation measurement (P2). 39 Figure 21 Example of OLTS reference measurement (P1) one test jumper (single-mode) . 40 Figure 22 Example link attenuation measurement of single-mode cabling using an OLTS 41 Figure 23 OTDR setup illustration of fiber link testing . 42 Figure 24 Effect of mandrel wrap . 44 Figure 25 Example OTDR trace illustrating length 45 Figure 26 Example OTDR trace illustrating attenuation rate . 46 Figure 27 Example OTDR trace illustrating insertion loss measurement 47 iv ANSI/TIA-568-C.0 FOREWORD (This foreword is not considered part of this Standard.) This Standard was developed by TIA Subcommittee TR-42.1. Approval of this Standard This Standard was approved by TIA Subcommittee TR-42.1, TIA Engineering Committee TR-42, and the American National Standards Institute (ANSI). ANSI/TIA reviews standards every 5 years. At that time, standards are reaffirmed, withdrawn, or revised according to the submitted updates. Updates to be included in the next revision should be sent to the committee chair or to ANSI/TIA. Contributing organizations More than 60 organizations within the telecommunications industry contributed their expertise to the development of this Standard (including manufacturers, consultants, end users, and other organizations). Documents superseded This Standard, in part, replaces ANSI/TIA/EIA-568-B.1 dated April 12, 2001 and its addenda. This Standard incorporates and refines the technical content of: ANSI/TIA/EIA-568-B.1-1, Addendum 1 Minimum 4-Pair UTP and 4-Pair ScTP Patch Cable Bend Radius ANSI/TIA/EIA-568-B.1-2, Addendum 2 Grounding and Bonding Specifications for Screened Balanced Twisted-Pair Horizontal Cabling ANSI/TIA/EIA-568-B.1-3, Addendum 3 Supportable Distances and Channel Attenuation for Optical Fiber Applications by Fiber Type ANSI/TIA/EIA-568-B.1-7, Addendum 7 Guidelines for Maintaining Polarity Using Array Con