Avaya ESS

ESS failover examples
Issue 1.1 June 2005 43
Figure 14: CSS with DS1C - remote takeover
CSS
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S8710 Media Server
(Main Server)
PN #1
PN #2
PN #3
PN #4
cycmcss4 KLC 031505
disc
S8500 ESS Server
(1st Alternative)
Remote site
becomes isolated
PSTN resources
in Remote PN
provides service
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