NBN Co Network Design Rules

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NBN Co Network Design Rules 1.1.24. Ethernet Combined Switch (ECS) This platform takes the functions of the EAS and EFS and combines them into the one physical box. It is used in the smaller POIs. The ECS node is connected to its paired ECS using N × 10Gbps direct fibre links, where N is 1 to 5. ECS N × 10Gbps ECS Figure 34 Aggregation Domain interfaces on the ECS Like the EAS, the ECS offers redundant connectivity to the access domains via 1Gbps, 10Gbps or subrate bit rates. The links can use any of the Transport Domain solutions for connectivity to remote locations (e.g. FAN sites), or direct fibre for any local connections within the POI (e.g. the PDN-GW for wireless access). The ECS has the same interfaces to Access Seekers as those on the EFS. See the section above on EFS Access Seeker interfaces. 1.1.25. Aggregation Domain and POI Architecture To support E-NNI redundancy, a POI site will contain one pair of EFSs or ECSs. The EFSs attach downstream to the EASs, which aggregate connectivity across all Access Domain nodes associated with the POI site. The ECSs combine the functionality of the EFSs and EASs. There are two physical architecture types for Points of Interconnect sites, based on whether the EAS/EFS is used, or the ECS: Two Tier: this architecture type uses at least two pairs of nodes, an EAS pair (which can grow to four EAS pairs, depending on the size of the POI site) and an EFS pair. 42
NBN Co Network Design Rules Aggregation Domain Access Wireless Access Nodes Aggregation EAS Pair 1 Access Seekers Fanout AS 1 Fibre Access Nodes EAS Pair 1 EFS E-NNI Mode A E-NNI Mode B AS 2 Wireless Access Nodes EAS Pair 4 EFS E-NNI Mode B E-NNI Mode A AS n Fibre Access Nodes EAS Pair 4 Figure 35 Two tier aggregation architecture One Tier: this uses a pair of Ethernet Combined Switches (ECSs), which is a single platform that combines the EAS and EFS functions. 43
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NBN Co Network Design Rules

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