rfc3313.txt:Bill Marshall:att:usa:16:jan:2003:UNKNOWN:figure,kwd,seccons,ianacons:draft-ietf-sip-call-auth:2002-06-10:2002-05-01:0:0:7:32:39:2:1999-10-1:395:draft-dcsgroup-sip-call-auth:2000-11-1:550:none:3677