The role of CVP in UCCE/PCCE is queuing and self-service IVR, as it provides voice response applications that can interact with callers, collect information, and queue calls for treatment by agents or other destinations. Reference = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 9

CVP Call/VXML Server is one of the core components of PCCE, as it provides voice response applications that can interact with callers, collect information, and queue calls for treatment by agents or other destinations. B Agent PG A and B side are another core components of PCCE, as they provide communication between CUCM and UCCE/PCCE components, such as Router, Logger, and CVP. Reference = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 9; Administering Advanced Cisco Contact Center Enterprise (CCEAA), page 3

The ICM component that delivers Route request to ICM Central Controller is CVP, as it acts as a routing client that sends routing requests and receives routing instructions from ICM. Reference = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 10