# Architecture options This section describes three architecture options that you can use to migrate an on-premises Avaya contact center to Amazon Lex and Amazon Connect Customer. Each architecture option has advantages and disadvantages. Review each to determine which is the best fit for your use case. Architecture options: + [Option 1: Ingress to Avaya and egress to Amazon Lex by using call transfers](option-1.md) + [Option 2: Ingress to Avaya and egress to Connect Customer by using a conference call](option-2.md) + [Option 3: Ingress to Connect Customer and egress to Avaya for agent transfer](option-3.md)