Avaya DEFINITY Server R Manual page 364

Adding New Carriers and EPN Cabinets
Figure 6-26 shows 2 SNs used as a CSS for up to 23 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. PPN Cabinet
4. EPN Cabinet 1
Figure 6-26. 2-Switch Node CSS with High Inter-SN Traffic
Fiber Engineering for 2 SNs
Switches with 2 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 the other 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.
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Issue 7 November 2003
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4 5
5. EPN Cabinet 11
6. EPN Cabinet 12
7. EPN Cabinet 23
8. Inter-SN Connection (4 fibers)
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