ISO/IEC 11801-6:2017 pdf download – Information technology – Generic cabling for customer premises – Part 6: Distributed building services.
5 Structure of the generic cabling system 5.1 General Clause 5 identifies the functional elements of generic cabling, describes how they are connected together to form subsystems and identifies the interfaces at which application- specific components are connected. Channels, created by connecting application-specific cabling components to the generic cabling, are used to support applications (see ISO/IEC 1 1 801 -1 ). 5.2 Functional elements 5.2.1 Stand-alone structure In addition to the functional elements specified in ISO/IEC 1 1 801 -1 , this document specifies two implementations of generic cabling for distributed building services. This document enables – Type A generic cabling to the SO, – Type B generic cabling to the SCP, thereby providing the opportunity for • application-specific cabling to be installed between the SCP and terminal equipment, • application-specific equipment to be connected at the SCP. The specification of application-specific cabling and equipment that CAN be connected to the SCP is outside the scope of this document. Type A generic cabling uses the following functional elements and interfaces: a) service distributor (SD) – equivalent to distributor 1 in ISO/IEC 1 1 801 -1 ; b) service distribution cable – equivalent to fixed cable (cable Z) within cabling subsystem 1 in ISO/IEC 1 1 801 -1 ; c) service concentration point (SCP) – equivalent to consolidation point in ISO/IEC 1 1 801 -1 ; d) service concentration point cable (SCP cable) – equivalent to cable Y in ISO/IEC 1 1 801 -1 ; e) service outlet (SO) – equivalent to TE outlet in ISO/IEC 1 1 801 -1 .Type B generic cabling uses the following functional elements and interfaces: 1 ) service distributor (SD) – equivalent to distributor 1 in ISO/IEC 1 1 801 -1 ; 2) service distribution cable – equivalent to fixed cable (cable Z) within cabling subsystem 1 in ISO/IEC 1 1 801 -1 ; 3) service concentration point (SCP) – equivalent to consolidation point in ISO/IEC 1 1 801 -1 . Groups of these functional elements are connected together to form cabling subsystems (see 5.3). An SCP can support both Type A and Type B generic cabling.
5.2.2 Overlay structure The structure of Type A and Type B generic cabling in association with generic cabling of other standards in the ISO/IEC 1 1 801 series is described in Annex B. The use of cabling in accordance with this document may supplement the connections to terminal equipment (TE) in the premises-specific standards and may affect the number of such connections (e.g. TO of ISO/IEC 1 1 801 -2) provided. 5.3 General structure and hierarchy 5.3.1 Type A generic cabling Type A generic cabling systems contain up to three cabling subsystems: campus backbone, building backbone and service distribution cabling. The cabling subsystems are connected together to create a generic cabling system with a structure as shown in Figure 2. The composition of the cabling subsystems is described in 5.4.1 and 5.4.2. The functional elements of the cabling subsystems are interconnected to form a hierarchical star topology as shown in Figure 3. Connections between cabling subsystems are either active, requiring application-specific equipment, or passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect approach (see ISO/IEC 1 1 801 -1 ). Passive connections between cabling subsystems adopt either a cross-connect approach, by way of either patch cords or jumpers, or an interconnect approach. NOTE “Active” equipment can include powered (e.g. network switches) or non-powered devices (e.g. optical fibre splitters). “Passive” equipment consists of connecting hardware (e.g. patch panels). The SO shall use connecting hardware in accordance with Clause 1 0.
5.4 Cabling subsystems 5.4.1 Campus and building backbone cabling subsystem See ISO/IEC 1 1 801 -1 :201 7, 5.3.2. 5.4.2 Service distribution cabling subsystem (Type A generic cabling) The service distribution cabling subsystem extends from an SD to the SO(s) connected to it. The subsystem includes a) the service distribution cables, b) the mechanical termination of the service distribution cables at the SO and the SD together with associated patch cords and/or jumpers at the SD, c) SCP(s) optional), d) the SCP cable(s). Although service area and equipment cords are used to connect terminal and transmission equipment, respectively, to the cabling subsystem, they are not considered part of the cabling subsystem because they can be application-specific. Service distribution cables shall be continuous from the SD to the SO(s) unless an SCP is installed (see 5.7.4).