Dear all, in my test I am using pjsip to call the x-lite softphone with OfficeSIP server. I have a problem when I try to cancel an invite transaction. In principle my UA should see: ----- invite --> <-- ringing ----- ---- CANCEL ---> <-- OK ------ My question regards the way in which I can send the CANCEL request. I am using pjsua so I tried pjsua_call_hangup() with codes 486,487 and 603 but the server returns "401 Unhautorized". In this situation the pjsip client close the transaction but the invided softphone keeps ringing. On the contrary when I use x-lite to invite my pjsip UA and then I cancel the transaction all is fine. What is the correct procedure to cancel an invite transaction? Thank you mario raffin -------------- next part -------------- A non-text attachment was scrubbed... Name: raffin.vcf Type: text/x-vcard Size: 266 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120606/bc8c867d/attachment.vcf>