A Partial Switchover is a scenario where the Avaya Oceana® components, such as Avaya Breeze® nodes and hosted services, are failed over to the DC2. In this scenario, the DC1 Avaya Aura® components remain active, so the Enterprise Survivable Server (ESS) does not become active.
Figure : 1. Avaya Oceana® DR Voice - DR Active state (Partial Switchover)
DC2 Avaya Oceana® is active.
The DC2 CallServerConnector snap-in connects to the DC1 Application Enablement Services through Khepri connectors (x2).
The DC1 Application Enablement Services connects to the Communication Manager through Computer Telephony Integration (CTI) Link 1.
The Communication Manager has an active CTI Link (4) to the DC2 Application Enablement Services because both components are functional, but this link is not used in this scenario.