Do you want the SDP or the SIP Headers? Your question is ambiguous! SDP should be in ${switch_r_sdp} X-Header should be in ${sip_h_X-Header} The "info" app helps show all the variables. /b On Sep 17, 2008, at 2:11 AM, Jon Bruel wrote: > How do I read the contents of the SIP headers sdp in a dialplan?