CUCM Architecture: Clustering and Database

1. Run-time data (Intra-cluster communication signal)

  • Actively running between CUCM servers in cluster
  • Example: phone registration
  • Example: CUCM failure results in phone relocation

2. Database Data (IDS DB Replication)

  • CUCM Database information replicated between servers
  • Example: phone extension mapping
  • Example: dial-plan changes
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