After migrating data from your previous contact center, you must register the endpoints to Avaya Contact Center – Extended Capacity for the contact center to route calls to and from the migrated endpoints. For Avaya J100 Series IP Phones and Avaya 9600 Series IP Deskphones migration, you must update the endpoint and contact center details in the endpoint configuration files and on the DHCP server. If you use Avaya Agent for Desktop, you must update the application settings to process contact center calls.

Avaya Contact Center – Extended Capacity does not support H.323 endpoints. If you migrate data for H.323 endpoints, you must also upgrade the endpoint firmware to SIP. If you use Avaya Agent for Desktop, you must configure the application to use SIP signaling.