Avaya DEFINITY Server R Manual page 366

Adding New Carriers and EPN Cabinets
Figure 6-28 shows 3 SNs used as a CSS for up to 31 EPNs. Use this
configuration when high inter-SN traffic is expected.
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Figure Notes
1. Switch Node (SN) 1
2. Switch Node 2
3. Switch Node 3
4. PPN Cabinet
5. EPN Cabinet 1
6. EPN Cabinet 9
Figure 6-28. 3-SN CSS with High Inter-SN Traffic
Fiber Engineering for 3 SNs
Switches with 3 SNs are connected by 1 to 7 fiber links to provide sufficient
switching fabric at the CSS. The traffic in all locales within a single SN does not
require engineering. Only traffic that links from locales in 1 SN to another SN (and
vice versa) must be engineered. The traffic that links across these fibers is simply
the sum of the traffic that links to locales located in the other SN.
6-50
Issue 7 November 2003
4 5
7
10
2
11
6
7
1
3
9
7. Inter-SN Connections (3 fibers)
8. EPN Cabinet 10
9. EPN Cabinet 20
10. Inter-SN Connection (2 fibers)
11. EPN Cabinet 21
12. EPN Cabinet 31
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