Cisco Cisco Unified Customer Voice Portal 10.0(1)

When an ICM script uses ASR and/or TTS, it sends pre-recorded voice prompts to the caller, or generates 
them with TTS through a voice synthesizing process. In response, the caller either uses a typed or voice 
response. If the caller chooses a voice response, the speech recognition engine attempts to match the 
caller’s voice to a set of stored options and responses. Speech recognition can be a set of words or type 
of response. 

An additional ISN feature for ASR/TTS is referencing an external VXML document from the 
Application Server VXML. This enables the reuse of previously defined VXML documents, which can 
contain lenghty TTS text or multiple prompt and collect steps. 

The Application Server does not validate the contents of imported any VXML documents. External 
VXML documents need to follow a very specific format in order to function correctly with ISN. 
Additionally, external VXML documents cannot return results/values to the ICM script.

The gateway requests VXML documents, media and ASR/TTS treatment from back-end servers. A pair 
of content switches provides high availability and load-balancing to these back-end servers. 

ISN Version 2.1 consists of the following components:

Application Server

Voice Browser

SDDSN

In addition to the call processing roles discussed in 

 the Application Server 

and Voice Browser perform configuration and administrative functions. They also supply data to the 
SDDSN that enables remote diagnosis of ISN solution problems.