rfc1091.txt:James VanBokkelen:ftp:usa:7:feb:1989:UNKNOWN::draft-ietf-sipping-reason-header-for-preemption:2005-09-29:2004-09-14:356:0:5:19:380:2:2004-4-8:90:draft-polk-sipping-reason-header-for-preemption:2004-7-8:66:2006-03-01:157