Avaya ESS User Manual page 43

Figure 14: CSS with DS1C - remote takeover
PN #1
PN #2
S8710 Media Server
(Main Server)
disc COMPACT
1
2
UID
disc COMPACT
1
2
UID
PN #3 CSS
Port Network Control Link (EAL)
IP Connection into Control Network
Server or Network Failure
VoIP Path
DSIC LInk
S8500 ESS Server
(1st Alternative)
disc
Remote site
becomes isolated
DS1C link
ESS failover examples
PN #4
PSTN resources
in Remote PN
provides service
CSS / EI (Fiber)
ATM / ATM-EI (Fiber)
Dup Link
Out of Service
cycmcss4 KLC 031505
Issue 1.1 June 2005 43