ESS failover examples
Issue 1.1 June 2005 39
Figure 11: Normal operation CSS with single ESS server
CSS
UID
2
1
0
1
1
0
3
2
3
2
disc
COMPACT
5
4
5
4
S
i
m
p
l
e
x
D
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p
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ch
ch
2
1
UID
2
1
0
1
1
0
3
2
3
2
disc
COMPACT
5
4
5
4
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i
m
p
l
e
x
D
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p
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ch
2
1
S8710 Media Server
(Main Server)
PN #1
PN #2
PN #3
disc
S8500 ESS Server
(1st Alternative)
PN #4
PN #5
PN #2 does not
have an IPSI
Recommended for survivability:
- IPSI in every PN
- IP Media Processor in every PN
cycmcss1 KLC 031505
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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