You can omit these instructions if the PSTN channel is not deployed in the solution.

Before switching back to the primary, you must shut down the existing PSTN Voice channel in a graceful manner. The following are some recommendations to shut down incoming voice contacts for the two front end options supported in Avaya Oceana® 3.x.

• For Avaya Oceana® deployments with a front-end application running on Avaya Experience Portal, it is recommended to have a flag is used at the start of the workflow for startup or shutdown operations. Using this flag, the administrator can redirect incoming voice calls to an automated response. The automated response rejects the incoming call or transfers the calls to an alternate call handling mechanism. The Avaya Oceana® 3.x solution uses Avaya Experience Portal voice application, which contains sample code to implement this using Call Application Variables (CAVs). Also, specifies the data center that is operational at a given time. Setting this flag to any of the data center ensures incoming PSTN voice contacts are only routed to that data center. This is a simple and effective method to turn on or turn off incoming voice to an Avaya Oceana® DR system.

• For Avaya Oceana® deployments with Call Center Elite as front end, a CM variable indicating Avaya Oceana® in service or out of service is configured and checked on new incoming voice contacts. If the flag is set to indicate out of service, then new incoming voice contacts are routed to alternate fallback options until the switchback to the DR infrastructure is complete.