Avaya ESS User Manual

ESS Overview
26 Avaya Enterprise Survivable Servers (ESS) Users Guide
The no service timer expires (see Figure 3), the IPSIs request service from the highest ESS
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
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
u
p
l
e
x
ch
ch
2
1
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
u
p
l
e
x
ch
ch
2
1
S8710 Media Server
(Main Server)
cycmer1 KLC 031505
disc
S8500 ESS Server
(2nd Alternative)
PN #1 PN #5
PN #2 PN #6PN #3 PN #7
PN #4 PN #8
S8700 ESS Server
(1st Alternative)
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

Avaya ESS Specifications

General

Brand	Avaya
Model	ESS
Category	Server
Language	English