ESS failover examples
Issue 1.1 June 2005 41
Example 5: CSS with DS1C
In example 5, Port Network 4 is remotely connected to the CSS using a DS1C. Port Network 4
is equipped with Public Switched Telephone Network resources. There is an IPSI board in each
Port Network.
Figure 13: CSS with DS1C - normal operation
CSS
UID
2
1
0
1
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0
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2
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2
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COMPACT
5
4
5
4
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1
UID
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1
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disc
COMPACT
5
4
5
4
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1
S8710 Media Server
(Main Server)
PN #1
PN #2
PN #3
PN #4
cycmcss3 KLC 031505
disc
S8500 ESS Server
(1st Alternative)
Remote site
DS1C link
Out of Service
CSS / EI (Fiber)
ATM / ATM-EI (Fiber)
Dup Link
Port Network Control Link (EAL)
IP Connection into Control Network
Server or Network Failure
VoIP Path
DSIC LInk
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