1、 TIA STANDARD Commercial Building Telecommunications Cabling Standard Part 1: General Requirements Addendum 5 Telecommunications Cabling for Telecommunications Enclosures TIA-568-B.1-5 (Supplement to TIA/EIA-568-B.1) TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industr
2、y in association with the Electronic Industries Alliance ANSI/TIA-568-B.1-5-2004 Approved: March 18, 2004 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE TIA Engineering
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7、 practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 3-4425-AD5, formulated under the cognizance of the TIA TR-42 Committee on User Premises Telecommunications Cabling Infrastructure.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATIO
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21、oduction or networking permitted without license from IHS-,-,-TIA-568-B.1-5 1 Telecommunications Cabling for Telecommunications Enclosures Addendum 5 to ANSI/TIA/EIA-568-B.1 1 INTRODUCTION The purpose of this addendum is to complement the recognition of TEs in TIA-569-B by providing cabling requirem
22、ents on when and where to use this space. This maintains structured cabling while providing additional flexibility offered by a TE in certain situations. Revisions are identified in the following text with additions shown in bold italics and deletions shown as strikeout. 2 SCOPE This Standard specif
23、ies minimum requirements for telecommunications cabling within an environment that uses telecommunications enclosures in its infrastructure. A telecommunications enclosure as defined in ANSI/TIA/EIA-569-B is a case or housing that is dedicated to the telecommunications function and related support f
24、acilities. Just like a telecommunications room, the telecommunications enclosure is a common access point for backbone and building pathways. The use of telecommunications enclosures is a specific implementation and not a general case. A telecommunications enclosure is intended to serve a smaller fl
25、oor area than a telecommunications room (see TIA-EIA 569-B). One must plan in advance if a telecommunications enclosure is needed and make sure that the introduction of this space will not create issues regarding the structured cabling systems, the management and administration of the installation.
26、TEs may be used as an addition to the minimum requirements of TIA-569-B that require one telecommunications room per floor and recommend an additional TR for each area up to 1000 m2(10000 ft2). The number of TRs required or recommended in TIA-569-B is not reduced by the use of TEs. TEs may also be u
27、sed for serving certain environments like classrooms, entrance lobbies, or historic buildings. This Standard provides requirements to retain the integrity of a structured cabling system, when a telecommunications enclosure is required. 3 CLAUSE REVISIONS 1.5 Telecommunications cabling system structu
28、re Figure 1-1 illustrates a representative model for the various functional elements that comprise a commercial building telecommunications cabling system. It depicts the relationship between the elements and how they are configured to create a total system. The elements of the telecommunications ca
29、bling system structure are: a) Horizontal cabling (clause 4); b) Backbone cabling (clause 5); c) Work area (clause 6); d) Telecommunications rooms and telecommunications enclosures (clause 7); e) Equipment rooms (clause 8); f) Entrance facilities (clause 9); and, g) Administration. Copyright Telecom
30、munications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-5 2 NOTE Basic administration information is covered in various locations throughout this Standard. Refer to ANSI/TIA/EIA-606-A for mo
31、re information regarding administration. NOTES 1 This figure is not meant to be an all-inclusive representation of the telecommunications cabling system and is provided only as a typical example. 2 All cross-connects located in the telecommunications rooms (TRs) and telecommunications enclosures (TE
32、s) in this figure are horizontal cross-connects (HCs). Figure 1-1 Typical telecommunications cabling system Building 2 Building 3 Building 4 EF InterbuildingBackbone Cabling Legend Access provider AP Entrance facility EF Equipment room ER Intermediate cross-connect IC Main cross-connect MC Telecommu
33、nications room TR Telecommunications Enclosure.TE Work area WA Telecommunications outlet/connector Cross-connect Splice Building 1AP Horizontal Cabling Intrabuilding Backbone Cabling TR ER/TR IC TR MC EF&ERWA TR IC TE EFEF & ER WA TR IC TR EF&ERWA TE IC TR WA Copyright Telecommunications Industry As
34、sociation Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-5 3 3.2 Definition of terms The generic definitions in this clause have been formulated for use by the entire family of telecommunications infrastructure sta
35、ndards. Specific requirements are found in the normative clauses of this Standard. For the purposes of this Standard, the following definitions apply. backbone: 1) A facility (e.g., pathway, cable or conductors) between any of the following spaces: telecommunications rooms, telecommunications enclos
36、ures, common telecommunications rooms, floor serving terminals, entrance facilities, equipment rooms, and common equipment rooms. 2) in a data center, a facility (e.g. pathway, cable or conductors) between any of the following spaces: entrance rooms or spaces, main distribution areas, horizontal dis
37、tribution areas, telecommunications rooms.(TR-42.1.1) building backbone: Pathways or cabling between telecommunications service entrance rooms, equipment rooms, telecommunications rooms, or telecommunications enclosures within a building. centralized cabling: A cabling configuration from the work ar
38、ea to a centralized cross-connect using pull through cables, an interconnect, or splice in the telecommunications room or telecommunications enclosure. enclosure, telecommunications: A case or housing for telecommunications equipment, cable terminations, or horizontal cross-connect cabling. intrabui
39、lding telecommunications backbone: This term is out dated term. See building backbone. space (telecommunications): An area used for housing the installation and termination of telecommunications equipment and cable, e.g., common equipment rooms, equipment rooms, common telecommunications rooms, tele
40、communications rooms, telecommunications enclosures, work areas, and maintenance holes/handholes. telecommunications enclosure: See enclosure, telecommunications. 3.3 Acronyms and abbreviations TE telecommunications enclosure Copyright Telecommunications Industry Association Provided by IHS under li
41、cense with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-5 4 4.1 General The horizontal cabling is the portion of the telecommunications cabling system that extends from the work area telecommunications outlet/connector to the horizontal cross-conn
42、ect in the telecommunications room or when used, in the telecommunications enclosure. The horizontal cabling includes horizontal cables, telecommunications outlet/connectors in the work area, mechanical terminations, and patch cords or jumpers located in the telecommunications room or when used, in
43、the telecommunications enclosure, and may include multi-user telecommunications outlet assemblies and consolidation points. NOTE - The term “horizontal“ is used since typically the cable in this part of the cabling system runs horizontally along the floor(s) or ceiling(s) of a building. The followin
44、g list of common services and systems should be considered when the horizontal cabling is designed. (The list is not intended to be complete.) a) Voice telecommunications service b) Premises switching equipment c) Data communications d) Local area networks (LAN) e) Video f) Other building signaling
45、systems (building automation systems such as fire, security, HVAC, EMS, etc.) In addition to satisfying todays telecommunications requirements, the horizontal cabling should be planned to reduce on-going maintenance and relocation. It should also accommodate future equipment and service changes. Aft
46、er construction of the building, the horizontal cabling is often much less accessible than the backbone cabling. The time, effort, and skills required for changes can be extremely high. In addition, access to the horizontal cabling frequently causes disruption to occupants and their work. These fact
47、ors make the choice and layout of horizontal cable types very important to the design of the building cabling. Consideration should be given to accommodating a diversity of user applications in order to reduce or eliminate the probability of requiring changes to the horizontal cabling as user needs
48、evolve. The pathways and spaces shall be designed and installed to support horizontal cabling in accordance with the requirements of ANSI/TIA/EIA-569-A ANSI/TIA/EIA-569-B. 4.2 Topology The horizontal cabling shall be installed in a star topology as shown in figure 4-1. Each work area telecommunicati
49、ons outlet/connector shall be connected to a horizontal cross-connect in a telecommunications room or when used, in the telecommunications enclosure via the horizontal cable. A telecommunications room or when used, a telecommunications enclosure should be located on the same floor as the work areas served. Some networks or services require applications-specific e
