The protocol used by CVP to communicate to VRU PG is GED-155, which stands for Generic External Device Protocol version 155. GED-155 allows CVP to send and receive messages from VRU PG for call control and data exchange. Reference = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 11

By using the reporting tools available in UCCE, such as Cisco Unified Intelligence Center (CUIC). Reports can be configured and customized in UCCE reporting by using the reporting tools available in UCCE, such as Cisco Unified Intelligence Center (CUIC). These tools allow administrators and managers to modify report templates, add custom data fields, and create reports that meet specific business needs.

Cisco Unified Contact Center Enterprise Serviceability (CUCEs). The Cisco Unified Contact Center Enterprise Serviceability (CUCEs) tool is used to troubleshoot system issues related to database connectivity. It provides tools for monitoring database activity, identifying database performance issues, and troubleshooting issues related to database connectivity.

The first thing that should be verified as part of troubleshooting in this scenario is D. Check if the caller DN settings on SPOG has valid PCS DN patterns configured.
According to the Cisco Packaged Contact Center Enterprise Features Guide, Release 12.0 (1), the mapping of a dialed number pattern to a Post Call Survey number enables the Post Call Survey feature for the call1. Therefore, if the caller DN settings on SPOG do not have valid PCS DN patterns configured, the Post Call Survey feature will not be triggered for any of the calls. The other options are not the first thing to verify, because they are either related to the Post Call Survey script or the expanded call variable that controls Post Call Survey, which are not relevant if the PCS DN patterns are not configured correctly.

It allows agents to monitor their own performance. The Cisco Finesse reporting tool allows agents to monitor their own performance and identify areas for improvement. It provides data on agent activity, call volume, and customer satisfaction, among other metrics.