Avaya ESS User Manual page 26

ESS Overview
The no service timer expires (see
server on its list (S8700 ESS server). The S8700 ESS server acknowledges the request and
takes control of the IPSI controlled Port Networks.
Figure 3: Main servers fail- ESS recovery of failure
S8500 ESS Server
(2nd Alternative)
disc
PN #1
PN #2
Port Network Control Link (EAL)
IP Connection into Control Network
Server or Network Failure
VoIP Path
DSIC LInk
cycmer1 KLC 031505
26 Avaya Enterprise Survivable Servers (ESS) Users Guide
Figure 3), the IPSIs request service from the highest ESS
S8710 Media Server
(Main Server)
PN #4
PN #3
CSS / EI (Fiber)
ATM / ATM-EI (Fiber)
Dup Link
Out of Service
disc COMPACT
1
2
UID
disc COMPACT
1
2 S8700 ESS Server
UID
(1st Alternative)
PN #5
PN #6
PN #8
PN #7