rfc6337.txt:Takuya Sawada:kddi:japan:32:aug:2011:UNKNOWN:figure,kwd,seccons:draft-ietf-sipping-sip-offeranswer:2011-06-14:2008-04-28:329:310:440:62:1141:10:2005-10-17:409:draft-sawada-sipping-sip-offeranswer:2006-12-01:517:2011-08-19:65