C One of the requirements for MTP configuration in Mobile Agent is that CTI ports use out of band DTMF, and SIP trunks use RFC2833 in-band DTMF, as this allows CVP to receive and process DTMF signals from different sources. D Another requirement for MTP configuration in Mobile Agent is that MTP resource is required to convert mobile agent out of band and CVP in-band signaling, as this enables CVP to communicate with mobile agent phones using different protocols. References = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 95; [Cisco Unified Contact Center Enterprise Features Guide, Release 12.5(1)] , page 28

The maximum bytes (Data + Variable name) per payload in a PCCE deployment is 2500 bytes. This is the limit imposed by the SIP protocol for the User to User Information (UUI) field that carries the ECC variables. References = [Cisco Unified Contact Center Enterprise Features Guide, Release 12.5(1)], page 23

The private network in UCCE/PCCE provides a dedicated communication channel between the duplexed components, such as Logger, Router, and PG, and keeps each side of the duplex pair in sync. References = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 20

A One of the conditions in which PCS legs get invoked is if Router Re-query is misconfigured and the Ring-No-Answer timeout expires, the caller is still transferred to the Post Call Survey DN. This can occur if a Queue node is used and Enable target re-query is checked, as this causes CVP to send a new routing request to CCE when no agent answers the call. B Another condition in which PCS legs get invoked is if The Post Call Survey DN is called if the Unified CVP has received at least one CONNECT message from CCE (either from the VRU leg or the Agent’s leg). Use the END node in the CCE routing script if the Post Call Survey is not required for the calls disconnected from the IVR, as this prevents CVP from transferring the call to the Post Call Survey DN when the call is terminated by the caller or the IVR. References = [Cisco Unified Contact Center Enterprise Features Guide, Release 12.5(1)], page 25

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. References = [Cisco Unified Contact Center Enterprise Solution Reference Network Design (SRND), Release 12.5(1)], page 11