Asterisk for Cepstral


I have a requirement to integrate Asterisk with RAGI (RUBY - AGI), which requires cepstral installation for the conversion of text to speech functionality.

In order to make the cepstral to work with Asterisk, which Asterisk installation would be suggested.

I dont want to install the AsteriskNow with the ISO file burned in a CD, as this doesn’t work for cepstral engine.

Can you give me the link to appropriate Asterisk installation which supports cepstral engine.

Thanks and appreciate your response.