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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText><span style='color:#1F497D'>Hi, everybody,<o:p></o:p></span></p><p class=MsoPlainText><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoPlainText><span style='color:#1F497D'>I want to implement the supplementary service, call transfer unconditional/busy/NoAnswer through SIP in Asterisk. <o:p></o:p></span></p><p class=MsoPlainText><span style='color:#1F497D'>The call transfer feature is successful, but I found the message flow is different with what I needed(there is no backward 181). <o:p></o:p></span></p><p class=MsoPlainText><span style='color:#1F497D'>The 181 message isn’t found as below picture.<o:p></o:p></span></p><p class=MsoPlainText><span style='color:#1F497D'>Does asterisk also already support 181? <o:p></o:p></span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img width=272 height=491 id="Picture_x0020_1" src="cid:image001.png@01CE114C.44068DF0"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks.<o:p></o:p></p><p class=MsoPlainText>Ding Peng<o:p></o:p></p></div></body></html>