Hello All,<br><br>i am a student and new to asterisk. What i am trying to do is to implement <br>a steganographic method to hide data into the audio of a PSTN call.<br>To do that, on one end of the call I am trying to modify the audio that is sent and on <br>
the other end of a call I am trying to retrieve that data. <br><br>I have wrote a dialplan function (based on func_volume.c) that does this using audiohooks. <br>Unfortunately i think that i don't understand how audiohooks work because I think I can't <br>
get only the audio from one end point of a call, modify it and send to another end point - I am<br>modifying how I understand it the "audio in a channel" - that is mixed audio from both end<br>points of a call. I hope you will understand me ;)<br>
<br><br>Here is a diagram what I have at home:<br><br>SIP-UA1 -> AST1 -> PSTN -> AST2 -> SIP-UA2<br><br>The call is between sip-ua1 and sip-ua2 - I would like to inject information in <br>one asterisk server and retrieve them in another<br>
<br><br>Thanks,<br>Sławomir Słoma<br>