Cisco Cisco E-Mail Manager Unity Integration Option Design Guide
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Cisco Unified Contact Center Enterprise 7.0, 7.1, and 7.2 SRND
OL-8669-16
Chapter 3 Design Considerations for High Availability
Peripheral Gateway Design Considerations
Figure 3-15
Unified ICM High Availability with One Unified CM Cluster
Redundant Unified ICM servers can be located at the same physical site or geographically distributed.
In both cases, the Unified ICM Call Router and Logger/Database Server processes are interconnected
through a separate private network. If the servers are located at the same site, you can provide the private
LAN by inserting a second NIC card in each server (sides A and B) and connecting them with a crossover
cable. If the servers are geographically distributed, you can provide the private network by inserting a
second NIC card in each server (sides A and B) and connecting them with a dedicated T1 line that meets
the specific network requirements for this connection as documented in the Unified ICM Installation
Guide, available at
In both cases, the Unified ICM Call Router and Logger/Database Server processes are interconnected
through a separate private network. If the servers are located at the same site, you can provide the private
LAN by inserting a second NIC card in each server (sides A and B) and connecting them with a crossover
cable. If the servers are geographically distributed, you can provide the private network by inserting a
second NIC card in each server (sides A and B) and connecting them with a dedicated T1 line that meets
the specific network requirements for this connection as documented in the Unified ICM Installation
Guide, available at
Within the Agent PG, two software processes are run to manage the connectivity to the Unified CM
cluster: the JTAPI Gateway and the Unified CM PIM. The JTAPI Gateway is started by the PG
automatically and runs as a node-managed process, which means that the PG will monitor this process
and automatically restart it if it should fail for any reason. The JTAPI Gateway handles the low-level
JTAPI socket connection protocol and messaging between the PIM and the Unified CM CTI Manager,
and it is specific for the version of Unified CM. This software module must be downloaded from
Unified CM when the PG is initially set up to ensure specific version compatibility.
cluster: the JTAPI Gateway and the Unified CM PIM. The JTAPI Gateway is started by the PG
automatically and runs as a node-managed process, which means that the PG will monitor this process
and automatically restart it if it should fail for any reason. The JTAPI Gateway handles the low-level
JTAPI socket connection protocol and messaging between the PIM and the Unified CM CTI Manager,
and it is specific for the version of Unified CM. This software module must be downloaded from
Unified CM when the PG is initially set up to ensure specific version compatibility.
TDM
access
76607
Sub 1
Sub 2
Unified CM
cluster
MDF
switch 1
Call control, CTI data,
IP messaging
TDM voice lines
Ethernet lines
IP messaging
TDM voice lines
Ethernet lines
ICM A
IP IVR 1
IP IVR 2
CM
PG A
CM
PG B
IP IVR
group
ICM central controllers
Publisher
M
Public
network
V
IDF
switch 1
IDF
switch 2
V
Voice
gateway 1
Voice
gateway 2
T1 lines
Gatekeepers
T1 lines
Corporate
LAN
Firewall
M
M
ICM B
MDF
switch 2
switch 2