I've been playing about with SIP-T and the sipt module and it looks like search_boundary() in parser/parse_body.c fails for binary content like SIP-I or SIP-T if the content is split in multipart mode as in the case of a INVITE which contains SDP content and ISUP (binary) content. I commented out the following lines in search_boundary() and it seems to work ok now // /* go to the next line */ // while ((c < buf_end) && (*c != '\n')) c++; --- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/83