1、 ETSI TS 101 573 V1.1.1 (2012-09) Access, Terminals, Transmission and Multiplexing (ATTM); General engineering of optical building cabling Technical Specification ETSI ETSI TS 101 573 V1.1.1 (2012-09)2Reference DTS/ATTM-02017 Keywords cable, intelligent homes Essential, or potentially Essential, IPR
2、s notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given
3、 as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Access, Terminals, Transmissio
4、n and Multiplexing (ATTM). Introduction The present document is effective when the optical cabling in a building is shared between multiple optical access operators. Figure 1 shows a schematic representation of what could exist in a building with multiple operators FTTH access networks, in two disti
5、nct situations: a) without shared cabling by using or not using a building distribution point (see figure 1); b) With shared cabling between the building distribution point and the ENTI (see figure 2). Figure 1: Individual building cabling for each operator Many cables and boxes could be installed i
6、n common parts in this assumption which can cause permanent disturbance for inhabitants. Besides, saturation of infrastructures could be reached with a strong impact on reliability of existing and new cables and on maintenance issues. A challenge for operators in that case could be to try to provide
7、 the condition for optical cabling sharing inside the building, as shown in figure 2. ETSI ETSI TS 101 573 V1.1.1 (2012-09)5Figure 2: Shared optical building cabling for all operators (when multiple “optical access networks“ are deployed) ETSI ETSI TS 101 573 V1.1.1 (2012-09)61 Scope The present doc
8、ument specifies the optical cabling in a building when it is shared between multiple optical access operators. The proposed building cabling allows access to each operator to optical fibres in the building for multi-dwelling units (MDU). The main goal of the concept is to be able to share the optica
9、l building cabling among different optical access operators. The present document details the different architectures of a shared optical cabling and each element of the building cabling. These elements are the distribution point, the indoor building cabling and the optical termination at the custom
10、er premises. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any ame
11、ndments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1
12、 Normative references The following referenced documents are necessary for the application of the present document. 1 CENELEC/IEC EN 60794-2 series: “Optical fibre cables - Part 2: Indoor optical fibre cables“. 2 CENELEC EN 50399: “Common test methods for cables under fire conditions - Heat release
13、and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results“. 3 CENELEC/IEC EN 60794-2-20: “Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical distribution cables“. 4 ITU-T Recommendation L.87 (2010): “Optical
14、fibre cables for drop applications“. 5 ETSI TS 102 873: “Access, Terminals, Transmission and Multiplexing (ATTM); Optical External Network Testing Interface“. 6 CENELEC/IEC EN 61755-1: “Fibre optic connector optical interfaces - Part 1: Optical interfaces for single mode non-dispersion shifted fibre
15、s - General and guidance“. 7 CENELEC/IEC EN 60793-2-50: “Optical fibres - Part 2-50: Product specifications - Sectional specification for class B singlemode fibres“. 8 CENELEC/IEC EN 61754-4: “Fibre optic connector interfaces - Part 4: Type SC connector family“. 9 CENELEC/IEC EN 61754-20: “Fibre opt
16、ic interconnecting devices and passive components - Fibre optic connector interfaces - Part 20: Type LC connector family“. 10 CENELEC/IEC EN 61754 series: “Fibre optic connector interfaces“. ETSI ETSI TS 101 573 V1.1.1 (2012-09)72.2 Informative references The following referenced documents are not n
17、ecessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: building operator: operator who
18、 installs and is responsible for the maintenance of the vertical and/or horizontal cabling in the building and gives an access to it to the other operators building optical line: optical line between the distribution point at the building basement and the customer outlet customer outlet: allows the
19、connection of fibre(s) from a cable to the ONT dedicated fibre: fibre dedicated for only one operator, which is available permanently for this operator NOTE: The fibre may be part of an indoor cable or of a blowing-based microducts. distribution point: point that allows the connection of the outdoor
20、 cable (feeder and / or drop) to the indoor (in-house or building) cable NOTE: The type of connection may be a fusion splice or other optical connection. drop cable: individual cable which links up the distribution point to the optical external network testing interface (ENTI) NOTE: This cable can b
21、e composed by one or more fibres. floor distributor: if exists, is situated on one floor and distributes fibres or indoor cables on one or across the floor(s) to each customer/ individual apartments outdoor drop cable: outdoor cable that comes into the building, ending at the distribution point opti
22、cal External Network Testing Interface (ENTI): physical point at which a subscriber is provided with access to an optical communications network NOTE: This is actually the optical connector adapter in the customer outlet. shared fibre: fibre shared between several operators, which is available tempo
23、rarily or permanently for one operator. vertical cabling: part of the building cabling between the distribution point and the floor distributor (when it exists.) or the ENTI 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: APC Angled Physical Contact ENT
24、I External Network Testing Interface FTTH Fibre To The Home LC Lucent Connector MDU Multi Dwelling Unit ONT Optical Network Termination ETSI ETSI TS 101 573 V1.1.1 (2012-09)8PON Passive Optical Network SC Subscriber connector UPC Ultra Physical Contact 4 Shared building cabling The building operator
25、 or building owner may take the initiative in cabling a building. They should expect to give the access to telecom operators to the optical building lines with a distribution point at the building basement. The number of operators should be limited by a maximum, for practical deployment reasons and
26、based on the real needs of the market. The “building operator“ deploying the building optical cabling could be in charge of the installation and/or maintenance of this sharing point. Usually this is the first operator who comes in. The shared building cabling combined with the distribution point sho
27、uld support both Point to Point and Point to Multipoint access network topologies. So, a Point to Point cabling shall be used by all telecom operators between the building basement and customer outlets or External Network Testing Interfaces (ENTI). 4.1 Single fibre architecture (one fibre for each c
28、ustomer, shared among different operators) Choice could be made to deploy only one fibre per customer in the vertical part of the building and to share it between the different operators. This choice could be made by the building operator or by the owner of the building, depending on free room in th
29、e vertical shaft or may be subject of co-operation contracts between operators. Telecom operators could have access to shared fibres at the distribution point. Each fibre is temporarily assigned to one operator when needed to give access to its services for customers. The single fibre dedicated to t
30、he customer could be contained in a single fibre drop cable or in a multi-fibres riser cable (see clause 6). 4.2 Multi-fibres architecture (more than one fibre for each customer, dedicated to single operators or shared among them) Choice could be also made to deploy a multi-fibres architecture based
31、 on the installation of minimum 2 fibres per apartment, in which a fibre is dedicated to each operator. Operators could have access to dedicated fibres at the distribution point, which are permanently available for their own use. It could be also possible to give access to shared fibres with this ar
32、chitecture. 5 Distribution point The Distribution Point is the interface between optical access networks of different operators and the optical building cabling. It should be compatible with Point to Point or Point to Multipoint optical access network architectures. Depending on building, area and n
33、etworks topologies, the Distribution Point could be used for one building when the building size is sufficient, but could also be shared between several buildings. It could be installed inside or outside buildings. Information about the localisation, number of apartment connected, owner and type of
34、Distribution Point should be available for all operators. ETSI ETSI TS 101 573 V1.1.1 (2012-09)9It represents: a flexibility point where the building operator can manage the allocation of customers fibres between telecom operators a demarcation point to separate the responsibility of each operator a
35、mong telcos and with building operators a point for optical measurements (attenuation and return loss), if optical connections available and demountable The Distribution Point should be composed of three parts (figure 3): a “customers area“ for the management of fibres from riser cables or indoor ca
36、bles (customer module) “operators area“ dedicated for each operator for the management of fibres coming from their access network. This separated area could be sort of modules with connectors or splice trays for example. They should be able to accept potential splitters. When it is not possible spli
37、tters could be installed in another box a “connection area“ for interconnection between fibres of the building cabling and access networks with use of patchcords or pigtails Operators access cablesConnection areaOperators areasCustomers areaRiser or drop cablesFigure 3: Illustration of a Distributio
38、n Point In case of a single fibre sharing architecture, the Distribution Point should allow an “any to any“ cross-connection between shared fibres of the building cabling and fibres from access networks of each operator. When a multi-fibres architecture is deployed in the building the Distribution P
39、oint should allow, for each operator which has a dedicated fibre in the building, the connection of its own building cabling fibres with fibres from its access network. The sharing point could give both access to dedicated fibres and shared fibres if the operator wants to share its fibres. The Distr
40、ibution Point should be designed to allow: frequent arrangements of fibres new cables installation or older cables replacement add-on or replacement of optical splitters when splitters are considered inside the sharing point (for PON access networks) splicing operations (fusion or mechanical). ETSI
41、ETSI TS 101 573 V1.1.1 (2012-09)10NOTE: It should be noted that the non-standardized dimensions of the mechanical splice protectors are not compatible to dimensions of the fusion splice protectors, therefore it is advisable to avoid the mechanical splices in the distribution point. The customers are
42、a should be dimensioned for all customers at day one. It could be useful to have the possibility to install operators areas only when needed with a modular solution. The Distribution Point should consider the environmental impact (climatic, mechanical, dust ) to allow indoor and outdoor installation
43、. 6 Indoor cabling Based on operators consensus, different cabling systems could be installed in the indoor part: easy mid span access cables microcabling solutions pre-connectorized solutions, etc. Cables used inside the building should be compliant with EN 60794-2 1 series. The reaction to fire of
44、 the cables shall comply to EN 50399 2. Figure 4 shows examples of cabling solutions in a building, both applicable to the single fibre or multi-fibres architecture. FloorDistributorDropcableOptical ENTIDistribution PointOperatorsRisercableDropcableDistribution PointOperatorsOpticalENTIFigure 4: Exa
45、mple of cabling solutions in buildings: The indoor cables may contain one or more fibres for each customer depending on the chosen architecture 6.1 Riser cable The riser cable(s) should be dimensioned to connect all customers premises in the building. Depending on the building configuration (number
46、of apartments, floors), type of sharing architecture (single fibre or multi-fibres), a riser cable could be based on single elements of one or several fibres (4, 8 or 12 fibres for example) to serve Distribution Points. In order to reduce the time for installation of the cable extremity in the distr
47、ibution point, it could be pre-terminated with connector plugs. ETSI ETSI TS 101 573 V1.1.1 (2012-09)116.2 Drop cable Drop cables should be compliant with requirements given in EN 60794-2-20 3 and recommendations in ITU-T Recommendation L.87 4. Only one single drop cable could be used for each custo
48、mer. It can contain one single mode fibre (case of a single fibre sharing architecture) or several single mode fibres (multi-fibres architecture). Depending on building architectures, drop cables could be laid (see figure 4): from the Distribution Point to the External Network Testing Interface or t
49、he Customer Outlet from the Floor Distributor to the External Network Testing Interface or the Customer Outlet Dimensional and mechanical characteristics of the cable shall be adapted for different building configurations. The drop cable can be pulled in existing sleeves but also stuck or stapled along the walls, or installed in a conduit. Techniques of blown cables/fibres in microducts can also be used. Installation of the drop cable could be made at day one (for example in case of new buildings), or only on demand when a
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