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No Voice Transfer Cisco TSP

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Hi,
 
I'm trying to do a simple TAPI 2.0 application which include the following functions :
1. Make Call
2. Receive Call
 
Here's the workflow that I used :
1. lineInitializeEx
2. lineOpen
3. lineMakeCall
4. lineDeallocateCall
5. lineClose
6. lineShutdown
 
Everything works fine. The application can make call to the designated address and also can receive calls from the outside.
The problem is, I can't hear anything during the call. Its connected, but no sound.
 
I've installed the Cisco wave drivers.
 
I've looked through the forums, there's a mention of RTP. But I have no idea about it. If there's any changes that have to be made, is it in my application or the CTI Manager. If my application, please do provide a link or example on how to use the RTP. If its CTI Manager, please do provide the necessary steps because I have to relay the information to the IT Dept. This is because I don't have direct access to the CTI Manager and the IT Dept doesn't know the problems.

I'm assuming the app is opening a configured CTI port.
 
Note, the wave driver provides a way for apps to play/record audio via the standard windows MMIO wave APIs, but it is up to the application to implement code that does something with these APIs.
 
There is a sample 'answering machine' application available here, which demonstrates some simple media playback from a file via the wave driver:  ../../../c/document_library/get_file?folderId=45959&name=DLFE-6078.zip

It seems i can't  download the file you've attached. =p

See 'Cisco TAPI Sample Application Project' on the Documentation page: http://developer.cisco.com/web/tapi/docs