Hi, It seems that the parser considers a response with only a response code and no "Reason Phrase" to be a syntax error - but according to the RFC the Reason phrase is optional (note the * at the beginning of the Reason-Phrase definition) and I have come across servers that do not include a Reason Phrase: Status-Line = SIP-Version SP Status-Code SP Reason-Phrase CRLF Status-Code = Informational / Redirection / Success / Client-Error / Server-Error / Global-Failure / extension-code extension-code = 3DIGIT Reason-Phrase = *(reserved / unreserved / escaped / UTF8-NONASCII / UTF8-CONT / SP / HTAB) Thanks, Brocha -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080721/240c726b/attachment.html