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DEFINITY Enterprise Communications Server Release 8.2
Upgrades and Additions for R8r
555-233-115
Issue 1
April 2000
Adding or Removing Cabinet Hardware
6-127Add Center Stage Switch
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Figure 6-48 shows 3 SNs used as a CSS for up to 43 EPNs. Use this configuration
when low inter-SN traffic is expected.
Figure 6-48. 3-SN CSS with Low 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.
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 13
7. Inter-SN Connections (1 fiber)
8. EPN Cabinet 14
9. EPN Cabinet 28
10. EPN Cabinet 29
11. EPN Cabinet 43
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