1、 TIA-758-B (Revision of TIA-758-A) March 2012Customer-Owned Outside Plant Telecommunications Infrastructure Standard ANSI/TIA-758-B-2012 APPROVED: MARCH 27, 2012 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between
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22、TAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-758-B i Customer Owned Outside Plant Telecommunications Infrastructure Standard Table of Contents FOREWORD vii 1 SCOPE 1 2 NORMATIVE REFERENCES 1 3 DEFINITION OF TERMS,
23、ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE . 3 3.1 General . 3 3.2 Definitions . 3 3.3 Acronyms and abbreviations 6 3.4 Units of measure 8 3.5 Symbols 8 4 CABLING INFRASTRUCTURE . 9 4.1 General . 9 4.2 Customer owned OSP cabling infrastructure overview 9 4.2.1 Pathways and spaces 9 4.2.2 Custo
24、mer owned OSP cabling . 9 4.3 Topology . 12 4.3.1 Entrance point diversity 12 4.3.2 Entrance route diversity . 12 4.4 Recognized Cabling . 15 4.5 Choosing media 15 4.6 Bonding and grounding 15 4.7 Environmental Considerations 15 5 PATHWAYS AND SPACES 16 5.1 Pathways 16 5.1.1 Subsurface pathways . 16
25、 5.1.1.1 General 16 5.1.1.2 Conduit/duct 16 5.1.1.2.1 General . 16 5.1.1.2.2 Conduit Type 17 5.1.1.2.3 Lengths between pulling points 17 5.1.1.2.4 Bends . 17 5.1.1.2.5 Number of bends 17 5.1.1.2.6 Drain slope . 18 5.1.1.2.7 Innerduct . 18 5.1.1.2.8 Duct plugs . 18 5.1.1.2.9 Bridge crossings . 18 5.1
26、.1.3 Utility tunnels . 19 5.1.1.3.1 General . 19 5.1.1.3.2 Planning 19 5.1.2 Direct-buried 20 5.1.3 Aerial pathways 20 5.1.3.1 General 20 5.2 Spaces 20 5.2.1 Maintenance holes . 21 5.2.1.1 General 21 5.2.1.2 Location . 23 5.2.1.3 Type . 24 5.2.1.4 Sizing . 24 ANSI/TIA-758-B ii 5.2.1.5 Covers . 25 5.
27、2.2 Handholes 25 5.2.2.1 General 25 5.2.2.2 Location . 25 5.2.2.3 Sizing . 26 5.2.2.4 Covers . 26 5.2.3 Pedestals and cabinets 26 5.2.3.1 General 26 5.2.3.2 Ground level pedestals and cabinet criteria 26 5.2.3.2.1 Installation requirements 27 5.2.3.3 Pole or wall mounted cabinets 27 5.2.3.4 Environm
28、entally controlled cabinets 27 5.2.4 Vaults . 27 5.2.4.1 Vault criteria . 27 5.2.4.2 Installation requirements . 28 5.2.5 Entrance Facilities 28 5.2.5.1 General 28 5.2.5.2 Seismic considerations 28 5.2.5.3 Entrance location considerations 28 5.3 Entrance pathway facilities . 28 5.3.1 Underground 28
29、5.3.2 Direct-buried 29 5.3.3 Aerial 29 5.3.4 Tunnels 30 5.3.5 Wireless . 30 5.3.5.1 Line of sight . 30 5.3.5.2 Cable pathways . 30 5.3.5.3 Location . 30 5.3.5.4 Support structures . 30 5.3.5.4.1 General . 30 5.3.5.4.2 Towers 30 5.3.5.4.3 Non-penetrating wireless transmission/reception device mounts
30、30 5.3.5.4.4 Penetrating wireless transmission/reception device mounts . 31 5.3.5.4.5 Electrical design considerations . 31 5.4 Entrance point 31 5.4.1 General 31 5.4.2 Conduit entrance design guidelines . 31 5.4.2.1 Penetration and termination 31 5.4.2.2 Drainage 31 5.4.2.3 Gas, water and vermin 31
31、 5.4.2.4 Pull box 31 6 CABLING . 34 6.1 Twisted-pair cabling 34 6.1.1 Twisted-pair cable 34 6.1.1.1 General 34 6.1.1.2 Cable performance 34 6.1.1.3 Cable construction types . 34 6.1.1.4 Aerial (self-support and lashed) 34 6.1.1.5 Buried service wire 34 6.1.1.6 Aerial service wire . 35 6.1.1.7 Screen
32、ed cable (internally) 35 6.1.2 OSP connecting hardware for balanced twisted-pair cables . 35 6.1.2.1 General 35 6.1.2.2 Environmental compatibility . 35 6.1.2.3 Materials 35 ANSI/TIA-758-B iii 6.1.2.4 Transmission . 35 6.1.2.5 Terminal block requirements . 35 6.1.2.5.1 General . 35 6.1.2.5.2 Wire co
33、mpatibility . 36 6.1.2.5.3 Wire pair identification 36 6.1.2.5.4 Test points 36 6.1.2.5.5 Mounting . 36 6.1.2.5.6 Stub cable . 36 6.1.2.6 Cross-connect block requirements 36 6.1.2.6.1 General . 36 6.1.2.6.2 Wire compatibility . 36 6.1.2.6.3 Wire pair identification 36 6.1.2.6.4 Wire termination . 37
34、 6.1.2.6.5 Test points 37 6.1.2.6.6 Terminal density . 37 6.1.2.6.7 Wiring harness 37 6.1.2.7 Building entrance terminals . 37 6.1.2.7.1 General . 37 6.1.2.7.2 Non-protected terminals . 37 6.1.2.7.3 Protected terminals. 37 6.1.2.8 Splicing connectors . 37 6.1.2.8.1 General . 37 6.1.2.8.2 Materials .
35、 39 6.1.2.8.3 Transmission 39 6.1.2.8.4 Tensile strength 39 6.1.2.8.5 Insulation resistance . 39 6.1.2.8.6 Salt fog exposure 39 6.1.3 OSP twisted-pair cross-connect jumpers . 40 6.1.4 Additional installation requirements . 40 6.1.4.1 Cable splices for BBOSP 40 6.1.4.2 Bridge-taps 40 6.1.4.3 Binder g
36、roup integrity 40 6.1.4.4 Cable bend radius . 40 6.1.5 OSP twisted-pair testing 40 6.2 Coaxial cabling . 41 6.2.1 General 41 6.2.2 75 coaxial cable . 41 6.2.2.1 General 41 6.2.2.2 Cable performance 41 6.2.3 75 coaxial connecting hardware 41 6.2.3.1 General 41 6.2.4 75 coaxial cable installation requ
37、irements . 41 6.2.5 75 coaxial cable testing 41 6.3 Optical fiber cabling 42 6.3.1 General 42 6.3.2 Optical fiber cable performance . 42 6.3.3 Optical fiber cable construction types 42 6.3.3.1 Duct cables 42 6.3.3.2 Armored cables . 42 6.3.3.3 Aerial cables 42 6.3.3.3.1 Self-supporting cables 42 6.3
38、.3.4 Indoor/outdoor cables 43 6.3.3.5 Drop cables . 43 6.3.4 Optical fiber connecting hardware . 43 6.3.4.1 Optical fiber splicing 43 6.3.4.1.1 Splicing methods 43 ANSI/TIA-758-B iv 6.3.4.1.2 Attenuation . 43 6.3.4.1.3 Return loss . 43 6.3.4.1.4 Mechanical protection 43 6.3.4.2 Optical fiber connect
39、ors . 44 6.3.5 Cabling Practices . 44 6.3.6 Optical fiber patch cords and cross-connect jumpers 44 6.3.7 Optical fiber cable installation requirements 44 6.3.8 Optical fiber cable testing. 44 6.3.9 Optical fiber inside terminals 44 6.3.9.1 General 44 6.3.9.2 Fiber storage and organizing housings . 4
40、4 6.3.9.3 Fiber distribution units utilizing optical fiber connectors 44 6.3.9.4 Fiber distribution units utilizing fiber splicing techniques 45 6.3.9.5 Fiber splice module housing 45 6.4 Pressurization of air-core twisted pair cables . 45 6.4.1 General 45 7 CABLING ENCLOSURES . 46 7.1 General . 46
41、7.2 Materials . 46 7.3 Copper twisted-pair splice closures 46 7.3.1 General 46 7.3.2 Common test for copper closures 46 7.3.3 Aerial copper closures/terminals 46 7.3.3.1 Application . 47 7.3.3.2 Special testing . 47 7.3.4 Buried service wire copper closures 47 7.3.4.1 Application . 47 7.3.4.2 Specia
42、l tests 48 7.3.5 Buried/underground/vault copper splice closures 48 7.3.5.1 Splice configurations . 48 7.3.5.2 Closure housing. 48 7.3.5.3 Installation requirements . 48 7.3.5.4 Special tests 49 7.4 Optical fiber 49 7.4.1 General 49 7.4.2 Optical fiber splice closure . 49 7.4.2.1 General 49 7.4.2.2
43、Application . 50 7.4.2.3 Criteria . 51 7.4.2.3.1 Splice configurations 51 7.4.2.3.2 Common tests 51 7.4.2.3.3 Installation requirements 51 7.4.2.4 Free-breathing optical fiber closures . 52 7.4.2.4.1 Special testing 52 7.4.2.4.2 Sealed aerial closures 52 7.4.2.4.3 Vented aerial closures 52 7.4.2.5 U
44、nderground closures . 52 7.4.2.6 Direct-buried closures . 52 7.4.2.6.1 Special tests . 53 7.4.2.7 Shield isolation/grounding closure. 53 7.4.2.8 Pedestal optical fiber closure 53 7.4.2.8.1 Special tests . 53 ANSI/TIA-758-B v ANNEX A (NORMATIVE) OSP Symbols 54 A.1 General . 54 ANNEX B (NORMATIVE) Phy
45、sical location and protection of below-ground cable plant 59 B.1 General . 59 B.2 Requirements . 59 B.2.1 Cable installation planning . 59 B.2.2 Location 60 B.2.2.1 Depth of plant 60 B.2.2.2 Joint construction 60 B.2.2.3 Separations from foreign structures 60 B.2.2.4 Permanent markings . 61 B.2.2.4.
46、1 Uniform Color Code . 61 B.2.3 Riser poles . 62 B.2.4 Building entrances . 62 B.2.5 Underwater cable crossings 62 B.2.6 Railroad crossings . 62 B.2.7 Bridge crossings 63 B.2.8 Tunnel installations 63 B.2.9 Highway accommodations . 64 B.2.10 Excavating responsibilities and procedures. 64 B.2.10.1 Da
47、mage prevention laws . 64 B.2.10.1.1 Regulations 64 B.2.10.1.2 Call before you dig responsibilities 64 B.2.10.1.3 One Call Bureau 65 B.2.10.2 Other information sources . 65 B.2.10.2.1 Central Registries 65 B.2.10.2.2 Other records and references 65 B.2.10.3 Recommended procedures for excavators . 65
48、 B.2.10.3.1 Notification of facility owners 65 B.2.10.3.2 Excavation marking 66 B.2.10.3.3 Commencement of work 66 B.2.10.3.4 Protection of marking . 66 B.2.10.3.5 Use of nondestructive excavation methods . 66 B.2.10.3.6 Backfilling . 66 B.2.10.3.7 Damaged facilities 66 B.2.10.3.8 Unknown or unmarke
49、d facilities . 66 B.2.10.3.9 Codes and regulations . 66 B.2.10.4 Recommended procedures for facility owners 66 B.2.10.4.1 Central registries 66 B.2.10.4.2 Marking of facilities 67 B.2.10.4.3 Marking of owners facilities 67 B.2.10.4.4 Marking exceptions 67 B.2.10.4.5 Offset staking and marking 67 B.2.10.4.6 Special situations . 67 B.2.10.4.7 Call for assistance 67 B.2.10.4.8 Marking materials . 67 B.2.11 Damage restoration . 67 B.3 As-built facility location record . 69 ANNEX C (INFORMATIVE) BIBLIOGRAPHY 70 ANSI/TIA-758-B vi List of Tables Table 1 Areas of
