hello Sergey yes i was using them with a IAM ISUP part inside the SIP response, so they were doing something, but it's not correct so it must be an ACM, ANM depending on the response. i made some more tests and i saw the issue is not with append_body_part which seems it's doing ok. it's with set_body_multipart when in responses seems cannot detect the body last boundary and close it by -- so the ISUP is malformed i could workaround this by parsing the body and adding it route[SIPISUP] { msg_apply_changes(); set_body_multipart(); msg_apply_changes(); $var(isup) = "\x06\x12\x25\x01\x39\x02\x12\x01\x00"; append_body_part("$var(isup)","application/isup;version=itu- t92+","signal;handling=optional"); msg_apply_changes(); $avp(s:xxxx) = $rb; $var(xxxx) = $(avp(s:xxxx){re.subst,/(.*)--unique-boundary-1(.*)/\1-- unique-boundary-1--\2/sg}); set_body("$var(xxxx)","multipart/mixed;boundary=\" unique-boundary-1\""); } this way at least we have a base ISUP part for a 1XX response best regards david El lun, 07-11-2016 a las 23:08 +0200, Sergey Basov escribió: Hi David, if you look at source code of the sipt modulehttps://github.com/kamailio/kamailio/blob/master/modules/sipt/sipt.c functions sipt_destination & sipt_set_calling works only for ISUP_IAM. But as I know from my tests ISUP encapsulation must be only in invite, and is optional for other messages. -- Best regards, Sergey Basov e-mail: sergey.v.basov(a)gmail.com tel: (+38067) 403-62-54 2016-11-07 19:19 GMT+02:00 david <descartin@bts.io>:> hello all>> i'm using kam version 4.4.1 and i would like to generate an ISUP part on the> 1xx,2xx responses to a remote carrier since the fsw i send the calls to> cannot handle ISUP SDP.> despite seeing in the doc that those functions cannot be used there and only> in REQUEST_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE, i tried and it works....> partially, because it seems it doesnt create the last boundary and it> creates a next boundary with an empty "Encapsulated multipart part: ">> this the the route i call from onreply_route>> route[SIPISUP] {> set_body_multipart();> msg_apply_changes();> $var(isup) => "\x01\x12\x49\x01\x0a\x03\x02\x0a\x08\x84\x90\x33\x41\x72\x17\x01\x06\x0a\x08\x04\x13\x93\x70\x21\x73\x23\x10\x08\x01\x01\x00";>> append_body_part("$var(isup)","application/isup;version=itu-t92+","signal;handling=optional");> msg_apply_changes();> sipt_destination($rU, 31, 4);> sipt_set_calling($fU, 4, 0, 3);> msg_apply_changes();> }>> am i doing something wrong? how can i set this to end the SDP with last> boundary?>> thanks a lot and regards> david>>> _______________________________________________> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list> sr-users(a)lists.sip-router.org&gt; http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users> _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users@lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users