ESS failover examples
Issue 1.1 June 2005 37
The system is now fragmented between two controlling servers.
● Some functionality provided by adjuncts may be missing for users in Port Networks 4 and
5. See Feature considerations
on page 88 for more information on adjuncts.
● Users on each side of the fragmentation cannot make normal station-to-station calls to
Port Networks on the other side of the fragmentation.
Figure 10: Mixed Port Network after failover
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)
PN #1
PN #2
PN #3
cycmpnc2 KLC 031505
disc
S8500 ESS Server
(1st Alternative)
PN #4
PN #5
ATM
PN #2 remains in service
WAN Failure
Remote Site
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
To Next Page
Loading...
