Have you looked at http://wiki.freeswitch.org/wiki/Mod_avmd Perhaps it could solve your problem. i.e. you could start playing your message (initially making the assumption that a human has answered) and if mod_avmd detects a beep then interrupt and replay your message. If this doesn't fit your use case the mod_avmd source code may give you somewhere to start. Regards, Owen On 8 February 2011 03:46, Frankie Yiu <yky1628@yahoo.com> wrote:

Hi there,

I would like to dial a phone number, and read the RTP package back when connected so that we can analyze the data; (to determine when we should play an audio at the right time--human or answer machine.)

We found a code for IVR test ( http://docs.freeswitch.org/switch__ivr_8c-source.html) Function name: switch_ivr_sound_test

We would like to do the same but with C# code, but we encountered a problem when calling the function "freeswitch.switch_core_session_read_frame( ) "

< in swig.cs

switch_core_session_read_frame(SWIGTYPE_p_switch_core_session session, SWIGTYPE_p_p_switch_frame frame, uint flags, int stream_id) >

where the second parameter--frame is a pointer to pointer of switch_frame type and in C# code, it is having a difficulty passing an object to the C++ side and keep the pointer place holder before going deeper into the C code (switch_core_io.c)

1) So is there any way I can call this function in C#? 2) Is there another function or routine that you can suggest me to for reading RTP package?

Thanks,

Frank

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