| Trunk Network |
| Node 1 |
| Node 2 |
| Access |
| Access |
| Node 3 |
| Terminals |
| Terminals |
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| n | Trunk and access
parts |
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| n | Access part
terminated by terminals |
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| n | Network nodes
and links are optimized for certain assumed |
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| traffic patterns |
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| n | This model
applies for both data (packet) and voice networks |
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| n | Due to these
network similarities network analysis carriers |
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| common subtopics |
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