Cisco Unified Contact Center Enterprise Solution Reference ...

Chapter 3 Design Considerations for High Availability
Figure 3-7 Assigning CTI Managers for PG Sides A and B
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Unified IP IVR (CRS) Design Considerations
PG side A, Cisco CallManager PIM 1 PG side B, Cisco CallManager PIM 1
Unified IP IVR (CRS) Design Considerations
The JTAPI subsystem in Unified IP IVR (CRS) can establish connections with two CTI Managers. This
feature enables Unified CCE designs to add Unified IP IVR (CRS) redundancy at the CTI Manager level
in addition to using the Unified ICM script to check for the availability of Unified IP IVR (CRS) before
sending a call to it. Load balancing is highly recommended to ensure that all Unified IP IVR (CRSs) are
used in the most efficient way.
Figure 3-8 shows two Unified IP IVR (CRS) servers configured for redundancy within one
Cisco Unified CallManager cluster. The Unified IP IVR (CRS) group should be configured so that each
server is connected to a different CTI Manager service on different Cisco Unified CallManager
subscribers in the cluster for load balancing and high availability. Using the redundancy feature of the
JTAPI subsystem in the Unified IP IVR (CRS) server, you can implement redundancy by adding the IP
addresses or host names of two Cisco Unified CallManagers from the cluster. Then, if one of the
Cisco Unified CallManagers fails, the Unified IP IVR (CRS) associated with that particular
Cisco Unified CallManager will fail-over to the second Cisco Unified CallManager.
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