Chapter 4 Cisco Call Back
Introducing Cisco Call Back
Figure 4-2 Cisco Extended Functions Service Dependency (Typical
Configuration)
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Multiple Cisco Extended Functions Applications in a Cluster
If multiple Cisco Extended Functions applications are active within a Cisco CallManager cluster, Cisco Extended Functions uses an algorithm to determine which application should be active and to order the remaining as backups. The Cisco Extended Functions application with the lowest IP address becomes active. The application with the next lowest IP address becomes the backup to the active application. Any remaining applications act as backups to each other, beginning with the application with the next lowest IP address. If you add any new applications to the cluster, Cisco Extended Functions restarts the algorithm to determine which application will be active.
Note When a Cisco Extended Functions application gets started in a cluster, the Cisco Extended Functions application with the lowest IP address becomes active. This process may cause an interruption to Call Back for approximately 2 minutes.
To verify the directory status and Cisco Extended Functions application registration status to the Cisco CTIManager, use the
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