For example, if I have sip phone that supports auto answer feature, how can I send variable or sip header via Esl to uuid? <div><br></div><div>Any hints? </div><div dir="ltr">-- <br></div><div dir="ltr"><table border="0" style="color:rgb(34,34,34);font-size:12px;border:1px dashed rgb(187,187,187);font-family:sans-serif;width:537px"><tbody style="border-spacing:2px;border:0px none rgb(128,128,128)"><tr valign="top" style="border-spacing:2px;border:0px none rgb(128,128,128)"><td style="font-family:arial,sans-serif;margin:8px;color:rgb(32,32,32);border-width:0px 1px 0px 0px;border-style:none solid none none;border-color:rgb(32,32,32) rgb(0,161,230) rgb(32,32,32) rgb(32,32,32);font-weight:bold;letter-spacing:1px;text-transform:capitalize;vertical-align:top;padding:1px 8px 1px 1px;width:63px;outline:rgb(32,32,32) none 0px;border-spacing:2px"><span style="color:rgb(0,161,230);outline:rgb(0,161,230) none 0px;border-spacing:2px;border:0px none rgb(0,161,230)"><font face="georgia, serif" size="2">Gregor Nanger</font></span><div style="font-size:17px;font-family:sans-serif;width:63px;outline:rgb(32,32,32) none 0px;border-spacing:2px;border:0px none rgb(32,32,32)"> </div></td><td style="font-family:arial,sans-serif;margin:8px;border:0px none rgb(80,80,80);vertical-align:top;padding:1px 1px 1px 6px;width:354px;outline:rgb(80,80,80) none 0px;border-spacing:2px"><font face="georgia, serif" size="1"><b>CTO</b><br>t./f.: 00386 (0) 7 6000 308/309 • m:. 00386 (0)41 756485 <br>• Infomedia d.o.o. • Jerebova 3, Novo mesto, Slovenia <br>• <a href="http://www.infomedia.si/" target="_blank">www.infomedia.si</a></font></td></tr></tbody></table></div>