Cisco Cisco IPCC Web Option Design Guide
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Cisco Unified Contact Center Enterprise 7.0, 7.1, and 7.2 SRND
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Chapter 3 Design Considerations for High Availability
Unified CM and CTI Manager Design Considerations
The design of Unified CM and CTI Manager should be performed as the second design stage, right after
the network design stage, and deployment should occur in this same order. The reason for this order is
that the Cisco Unified Communications infrastructure must be in place to dial and receive calls using its
devices before you can deploy any telephony applications. Before moving to the next design stage, make
sure that a PSTN phone can call an IP phone and that this same IP phone can dial out to a PSTN phone,
with all the call survivability capabilities considered for treating these calls. Also keep in mind that the
Unified CM cluster design is paramount to the Unified CCE system, and any server failure in a cluster
will take down two services (CTI and Unified CM), thereby adding an extra load to the remaining servers
in the cluster.
the network design stage, and deployment should occur in this same order. The reason for this order is
that the Cisco Unified Communications infrastructure must be in place to dial and receive calls using its
devices before you can deploy any telephony applications. Before moving to the next design stage, make
sure that a PSTN phone can call an IP phone and that this same IP phone can dial out to a PSTN phone,
with all the call survivability capabilities considered for treating these calls. Also keep in mind that the
Unified CM cluster design is paramount to the Unified CCE system, and any server failure in a cluster
will take down two services (CTI and Unified CM), thereby adding an extra load to the remaining servers
in the cluster.
Configuring Unified ICM for CTI Manager Redundancy
To enable Unified CM support for CTI Manager failover in a duplex Unified CM model, perform the
following steps:
following steps:
Step 1
Create a Unified CM redundancy group, and add subscribers to the group. (Publishers and TFTP servers
should not be used for call processing, device registration, or CTI Manager use.)
should not be used for call processing, device registration, or CTI Manager use.)
Step 2
Designate two CTI Managers to be used for each side of the duplex Peripheral Gateway (PG), one for
PG Side A and one for PG Side B.
PG Side A and one for PG Side B.
Step 3
Assign one of the CTI Managers to be the JTAPI service of the Unified CM PG Side A. (See
Step 4
Assign the second CTI Manager to be the JTAPI service of the Unified CM PG Side B. (See
Figure 3-7
Assigning CTI Managers for PG Sides A and B
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PG side A, Cisco CM PIM 1
PG side B, Cisco CM PIM 1