I am excited to see that you have started your journey towards learning how to build a contact center based on Cisco Unified Contact Center Express Server. Cisco Unified Contact Center technologies provide powerful, agent-based services that result in reduced business costs and improved customer response by providing sophisticated and distributed automatic call distributor (ACD), interactive voice response (IVR), computer telephony integration (CTI), and agent and desktop services. It enables the effective management of inbound and outbound voice, email, web chat, and customer interactions. Please feel free to reach out to me if you have any questions or if you get stuck setting up a contact center environment.