NBN Co Network Design Rules

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NBN Co Network Design Rules 1.1.2.5. PON Planning Hierarchy For planning, design, and construction purposes the network is divided into hierarchical modules and network entities. These modules are used to provide the planning constructs needed to provide connectivity between the individual End-Users premise through to the Access Seeker (AS) Point of Interconnection (POI) The first identifiable connection point is an end-user premise. These are defined as physical address points. Each individual dwelling unit is required to have a unique service location, and is identified as an end-user. If the end-user premise is situated in a Multi-Dwelling unit environment then these are treated as individual connections. The first module is the Fibre Distribution Area (FDA) which is comprised of an average of 200 endusers. The FDA is the catchment area of a Fibre Distribution Hub (FDH) which provides a passive optical aggregation point for the LFN into the DFN. X 200 FIBRE DISTRIBUTION AREA (FDA) Figure 8 Fibre Distribution Area The second module is the combination of a maximum of 16 FDAs to create a Fibre Serving Area Module (FSAM). An FSAM with the maximum of 16 FDAs will, as a result, have an average catchment of 3200 end-users. 14
NBN Co Network Design Rules X 200 9 X 200 10 X 200 11 X 200 12 FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) X 200 3 X 200 4 X 200 5 X 200 13 FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) X 200 2 X 200 7 X 200 6 X 200 14 FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) X 200 1 X 200 8 X 200 16 X 200 15 FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) FIBRE DISTRIBUTION AREA (FDA) Figure 9 Fibre Serving Area Module Example The modular size of the FSAM is dependent on the geography of the area to be served and can be constructed with any number of FDHs. The maximum design shall allow for the grouping of 16 FDAs onto a single DFN cable. This grouping can contain between 13 and 16 FDAs and for this the DFN requires two loops, an inner and an outer loop, and these are used to provide connectivity of a maximum of 16 FDHs. The inner loop as shown in figure 6 is used for FDHs 1-8 and the outer loop for 9-16. The cable links between FDA 3 back to the FAN and FDA 8 back to the FAN is a 576 fibre cable split evenly across the two rings at the splice closures located in FDA 3 and FDA 8. FDA 9 FDA 10 FDA 11 FDA 12 FDA 3 FDA 4 FDA 5 FDA 13 FDA 2 FDA 7 FDA 6 FDA 14 FDA 1 FDA 8 FDA 16 FDA 15 Outer Loop Inner Loop Splice Closure FDH FAN Figure 10 16 X FSAM Distribution Cable Connectivity 15
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