Hello, I´m having some problems with códec negotiation and one way audio . I take some Sip captures and I notice that Freeswitch is not inserting * fmtp* parameters in SDP in his 200OK response. I notice that this is a common behavior. I really need that FS generates the complete SDP (with fmtp) because some devices only accept for example G729 annexb=no. I tried with the function sip_append_audio_sdp but it only accepts one a=fmtp line. “ <tr valign=top> <th align="left"> @RFC3264: SDP Offer/Answer Negotiation </th> <td> Generating and processing offers or answers. </td> <td> - "a=fmtp" parameters are not taken into account when generating or processing answer </td> </tr> ” Regards, *Camila Troncoso **|* Ingeniero de Desarrollo RedVoiss *|*ctroncoso@redvoiss.net Santiago - Chile *|* +56 2 2408535 www.redvoiss.net