I am trying to use switch_r_sdp to rewrite the SDP. The problem I am facing has to do with the way of doing it. Let's say I have: v=0 o=- 1258463684 1258463684 IN IP4 xxx.xxx.xxx.xxx s=Opal SIP Session c=IN IP4 xxx.xxx.xxx.xxx t=0 0 m=audio 5144 RTP/AVP 18 3 101 120 c=IN IP4 xxx.xxx.xxx.xxx a=rtpmap:18 G729/8000/1 a=fmtp:18 annexb=no a=rtpmap:3 gsm/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16,32,36 a=rtpmap:120 NSE/8000 a=fmtp:120 192-193 who to I set the switch_r_sdp variable in xml? Obviously this doesn't work : <action application="set" data="switch_r_sdp=v=0 o=- 1258463842 1258463842 IN IP4 xxx.xxx.xxx.xxx s=Opal SIP Session c=IN IP4 xxx.xxx.xxx.xxx t=0 0 m=audio 5148 RTP/AVP 18 3 101 120 c=IN IP4 xxx.xxx.xxx.xxx a=rtpmap:18 G729/8000/1 a=fmtp:18 annexb=no a=rtpmap:3 gsm/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16,32,36 a=rtpmap:120 NSE/8000 a=fmtp:120 192-193 "/> Do I have to escape any special characters and how? I tried using escaped quotes, escaped spaces, escaped tabs etc. Nothing worked. Any suggestions? -- ------------------------------------------- Apostolos Pantsiopoulos Kinetix Tele.com R & D email: regs@kinetix.gr -------------------------------------------