Avaya ESS User Manual page 46

ESS Overview
Figure 16: CSS with multiple nodes - failover
PN #1
PN #2 remains in service
Port Network Control Link (EAL)
IP Connection into Control Network
Server or Network Failure
VoIP Path
DSIC LInk
cycmcss6 KLC 031505
46 Avaya Enterprise Survivable Servers (ESS) Users Guide
S8710 Media Server
(Main Server)
disc COMPACT
disc COMPACT
PN #2
PN #3 CSS
S8700 ESS Server
(1st Alternative)
1
2
UID
1
2
UID
CSS PN #4
CSS / EI (Fiber)
ATM / ATM-EI (Fiber)
Dup Link
Out of Service
PN #6
PN #5
LAN (IP PNC)