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23、THOUT SUCH LIMITATIONS. ANSI/TIA-PN-942-B i Telecommunications Infrastructure Standard for Data Centers Table of Contents 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 Definition of terms . 2 3.3 Acronyms and abbrevia
24、tions . 7 3.4 Units of measure . 8 4 DATA CENTER DESIGN OVERVIEW 9 4.1 General 9 4.2 Relationship of data center spaces to other building spaces 9 4.3 Availability and Security 10 4.4 Consideration for involvement of professionals 11 5 DATA CENTER CABLING SYSTEM INFRASTRUCTURE . 12 6 DATA CENTER TEL
25、ECOMMUNICATIONS SPACES AND RELATED TOPOLOGIES . 15 6.1 General 15 6.2 Data center structure . 15 6.2.1 Major elements 15 6.2.2 Basic data center topology 16 6.2.3 Reduced data center topologies 17 6.2.4 Distributed data center topologies . 17 6.2.5 Topologies for broadband coaxial cabling . 18 6.3 E
26、nergy efficient design 18 6.3.1 General 18 6.3.2 Energy efficiency recommendations 19 6.4 Common requirements for computer rooms and entrance rooms 22 6.4.1 General 22 6.4.2 Architectural design . 22 6.4.3 Environmental design 24 6.4.4 Electrical design . 24 6.4.5 Fire protection 25 6.4.6 Water infi
27、ltration . 25 6.4.7 Access . 25 6.5 Computer room requirements . 25 6.5.1 General 25 6.5.2 Location . 26 6.5.3 Environmental design - HVAC . 26 6.5.4 Electrical design . 26 6.6 Entrance room requirements. 26 6.6.1 General 26 ANSI/TIA-PN-942-B ii 6.6.2 Location . 26 6.6.3 Quantity 26 6.6.4 Entrance c
28、onduit routing under access floor . 27 6.6.5 Access provider and service provider spaces . 27 6.6.6 Building entrance terminal . 27 6.6.7 Architectural design . 27 6.7 Main distribution area 28 6.7.1 General 28 6.7.2 Location . 28 6.7.3 Facility requirements 28 6.8 Intermediate distribution area . 2
29、8 6.8.1 General 28 6.8.2 Location . 29 6.8.3 Facility requirements 29 6.9 Horizontal distribution area . 29 6.9.1 General 29 6.9.2 Location . 29 6.9.3 Facility requirements 29 6.10 Zone distribution area . 29 6.11 Equipment distribution areas 29 6.12 Telecommunications room 30 6.13 Data center suppo
30、rt areas. 30 6.14 Cabinets and racks . 30 6.14.1 General 30 6.14.2 “Hot“ and “cold“ aisles . 30 6.14.3 Placement relative to floor tile grid . 31 6.14.4 Access floor tile cuts 31 6.14.5 Installation of racks on access floors . 32 6.14.6 Racks and cabinets in entrance room, MDAs, IDAs and HDAs 32 7 D
31、ATA CENTER CABLING SYSTEMS . 33 7.1 General 33 7.2 Choosing media 33 7.2.1 General 33 7.2.2 Cable fire rating requirements . 33 7.3 Horizontal Cabling . 33 7.3.1 General 33 7.3.2 Topology 34 7.3.3 Horizontal cabling length . 34 7.3.4 Direct attach cabling 34 7.3.5 Recognized media . 35 7.3.6 Optical
32、 fiber connectors . 35 7.3.7 Coaxial cable connectors . 35 7.4 Backbone cabling 36 7.4.1 General 36 7.4.2 Topology 36 7.4.3 Redundant cabling topologies . 37 7.4.4 Recognized media . 37 7.4.5 Optical fiber connectors . 38 7.4.6 Coaxial cable connectors . 38 7.4.7 Backbone cabling lengths 38 7.5 Cent
33、ralized optical fiber cabling 38 7.5.1 General 38 7.5.2 Implementation 38 7.6 Cabling transmission performance and test requirements . 38 7.6.1 General 38 ANSI/TIA-PN-942-B iii 7.6.2 Additional requirements for field testing of 75-ohm coaxial cabling 38 8 DATA CENTER CABLING PATHWAYS 40 8.1 General
34、40 8.2 Security for data center cabling 40 8.3 Routing of telecommunications cables . 40 8.3.1 Separation between power or lighting and balanced twisted-pair cables 41 8.3.2 Separation of fiber and balanced twisted-pair cabling . 41 8.4 Telecommunications entrance pathways 41 8.4.1 Entrance pathway
35、types 41 8.4.2 Diversity . 41 8.4.3 Sizing . 41 8.5 Access floor systems 42 8.5.1 General 42 8.5.2 Access floor performance requirements 42 8.5.3 Floor tile cut edging 42 8.6 Cable trays 42 8.6.1 General 42 8.6.2 Cable trays in access floor systems 43 8.6.3 Overhead cable trays . 43 8.6.4 Coordinati
36、on of cable tray routes . 43 9 DATA CENTER REDUNDANCY 44 9.1 Introduction . 44 9.2 Redundant maintenance holes and entrance pathways . 45 9.3 Redundant access provider services 45 9.4 Redundant entrance room 45 9.5 Redundant main distribution area . 46 9.6 Redundant backbone cabling . 46 9.7 Redunda
37、nt horizontal cabling . 46 10 CABLING INSTALLATION REQUIREMENTS . 46 11 CABLING TRANSMISSIONG PERFORMANCE REQUIREMENTS . 46 12 CABLING FOR INTELLIGENT BUILDING SYSTEMS 46 13 CABLING FOR WIRELESS ACCESS POINTS . 46 14 CABLING FOR DISTRIBUTED ANTENNA SYSTEMS 46 15 POWER DELIVERY OVER BALANCED TWISTED-
38、PAIR CABLING . 46 16 GROUNDING AND BONDING 46 17 FIRESTOPPING 47 18 PHYSICAL SECURITY . 47 19 ADMINISTRATION 47 ANNEX A (INFORMATIVE) CABLING DESIGN CONSIDERATIONS 49 A.1 Application cabling lengths 49 A.1.1 T-1, E-1, T-3 and E-3 circuit lengths 49 A.1.2 Baluns E-3 and T-3 circuits 51 ANSI/TIA-PN-94
39、2-B iv A.1.3 TIA-232 and TIA-561 console connections . 52 A.2 Cross-connections 53 A.3 Separation of functions in the main distribution area 53 A.3.1 Twisted-pair main cross-connect . 53 A.3.2 Coaxial main cross-connect . 53 A.3.3 Optical fiber main cross-connect . 53 A.4 Separation of functions in
40、the horizontal distribution area 54 A.5 Cabling to end equipment . 54 A.6 Fiber design consideration 54 A.7 Balanced twisted-pair design consideration 54 ANNEX B (INFORMATIVE) ACCESS PROVIDER INFORMATION . 55 B.1 Access provider coordination 55 B.1.1 General 55 B.1.2 Information to provide to access
41、 providers 55 B.1.3 Information that the access providers should provide . 55 B.2 Access provider demarcation in the entrance room . 56 B.2.1 Organization . 56 B.2.2 Demarcation of low-speed circuits . 56 B.2.3 Demarcation of T-1 circuits 59 B.2.4 Demarcation of E-3 mandatory and advisory. The manda
42、tory requirements are designated by the word “shall“; advisory requirements are designated by the words “should”, “may“, or “desirable“ which are used interchangeably in this Standard. Mandatory criteria generally apply to protection, performance, administration and compatibility; they specify minim
43、ally acceptable requirements. Advisory criteria are presented when their attainment may enhance the general performance of the cabling system in all its contemplated applications. A note in the text, table, or figure is used for emphasis or offering informative suggestions, or providing additional i
44、nformation. Metric equivalents of US customary units The dimensions in this Standard are metric or US customary with approximate conversion to the other. Life of this Standard This Standard is a living document. The criteria contained in this Standard are subject to revisions and updating as warrant
45、ed by advances in building construction techniques and telecommunications technology. ANSI/TIA-PN-942-B 1 1 SCOPE This Standard specifies the minimum requirements for telecommunications infrastructure of data centers and computer rooms, including single tenant enterprise data centers and multi-tenan
46、t data centers. The topology specified in this document is intended to be applicable to any size data center. 2 NORMATIVE REFERENCES The following standard contains provisions that, through references in this text, constitute provisions of this Standard. At the time of publication, the editions indi
47、cated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards published by them. a) ANSI/ATIS 0600404:2005, Network and Customer Installation Interfaces DS3
48、 and Metallic Interface Specification b) ANSI/NFPA 75-2017, Standard for the Fire Protection of Information Technology Equipment c) ANSI/TIA-568.0D:2015 Generic Telecommunications Cabling for Customer Premises d) ANSI/TIA-568.1D:2015 Commercial Building Telecommunications Infrastructure Standard e)
49、ANSI/TIA-568-C.2:2009, Balanced Twisted-Pair Telecommunications Cabling and Components Standard f) ANSI/TIA-568.3D:2016 Optical Fiber Cabling and Components Standard g) ANSI/TIA-568.4D:2017 Broadband Coaxial Cable and Components Standard h) ANSI/TIA-569-D:2015 Telecommunications Pathways and Spaces i) ANSI/TIA-604-5-E:2015 FOCIS 5 Fiber Optic Connector Intermateability Standard, Type MPO j) ANSI/TIA-604-10-B:2008 FOCIS 10 Fiber Optic Connector Intermateability Standard, Type LC k) ANSI/TIA-604-18:2015 FOCIS 18 Fiber Optic Connector Intermateability Standard,
