Cisco Cisco Customer Voice Portal 8.0(1)

For detailed information about each ISN IVR functional model—including configuration 
instructions—see Appendix C, “ISN Deployment,” in the Cisco ISN Configuration and 
Administration Guide.

The Advanced Speech IVR ISN functional model is for customers who desire ASR/TTS, but do not need 
to control queued calls or to outpulse digits for Transfer Connect. In this configuration, the ISN Voice 
Browser is not required, using the VXML client on the application gateway instead, and the ISN consists 
solely of the Application Server component.

 shows the general architecture of the Advanced Speech IVR ISN. 

The call flow in 

 is as follows:

The call arrives from the PSTN network to the Gateway.

The Gateway treats the call using VXML processing and informs the Application Server that a call 
has arrived.

The ISN Application Server requests instructions of the NAM/ICM.

The NAM/ICM consults the customer database/application as needed and determines which scripts 
to run and what information to communicate. The NAM/ICM passes this information to the 
Application Server. 

The ISN uses the Gateway’s prompt/collect capabilities, possibly with ASR/TTS.

If the NAM/ICM instructed that the call should be transferred, the ISN requests the Gateway to 
transfer the call to the endpoint (either a traditional ACD or IPCC).