Cisco Cisco Customer Voice Portal 8.0(1)

 describes how to resolve problems you might encounter during call transfer or connection.

Large number of invalid 
entries for speech recognition

Call Manager has an incorrectly configured service parameter

When the Speech recognition server recognizes voice input, it 
determines a confidence score that signifies how confident the server is 
that it correctly matched caller input. This confidence score is anywhere 
from 0 to 1.0 where 1.0 is 100% confidence that the grammar match is 
correct. 

By default, Customer Voice Portal tells the Speech recognition server to 
throw an invalid entry error for all confidences below 0.7 or 70% for 
"GetDigits" and "Menu" and 0.5 or 50% for "GetSpeech". For some 
applications, this value is too high and will result in false invalid entry 
errors. 

Consult the ASR vender to determine if the default confidence 
thresholds used by Customer Voice Portal (0.7 for GetDigits and Menu, 
0.5 for GetSpeech) is incorrect for your applications. If the default 
values are indeed incorrect and need to be changed, the Customer Voice 
Portal templates will need to be adjusted. Contact Cisco TAC for 
instructions on template modification. 

Intermittently, prompts are 
not played - Random 
prompts, random ICM scripts

Media file caching is not configured correctly on the gateway. 

If media caching is not enabled on the gateway, the gateway must fetch 
every prompt for every call. We have seen that this overloads some 
internal mechanism on the gateway and causes prompt play failures.   
For procedures on how to set up gateway caching, see 

 of this manual.

Clicking noise is heard 
during Scansoft TTS on IP 
phones

Possible Cause:

Change made to Scansoft OSSserver.cfg file under

ScanSoft\SpeechWorks OpenSpeech Media Server\Server\config

Possible Solution:

Set the following:

server.transport.audio.playerPacketDataSize  VXIInteger 160

Excessive unavailable ASR 
errors in Customer Voice 
Portal VXML Server 
application error log.

e.g. SERVER ERROR:A 
VoiceXML exception 
occurred:error.com.cisco.me
dia.resource.unavailable.asr

Possible Cause:

The default MRCP timeout value of 3 seconds needs to be increased.

Possible Solution:

The default MRCP timeout values need to be increased to 5 seconds on 
the gateway as follows: