FS supports SIP for sure, and if you're feeling crazy you can try h.323. Or you can build the IVR in FS itself and cut out the middle man.
-MC

On Thu, Feb 17, 2011 at 8:18 AM, Jason b.a <k-b-24@live.com> wrote:
yeh i am using xlite , so my design will be
xlite--IVR application--freeswitch
but what about the signaling or control protocol used between app and Fs.
 

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