Index: channels/chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.847
diff -u -r1.847 chan_sip.c
--- channels/chan_sip.c	13 Sep 2005 01:38:00 -0000	1.847
+++ channels/chan_sip.c	13 Sep 2005 22:11:51 -0000
@@ -534,6 +534,7 @@
 	struct ast_codec_pref prefs;		/* codec prefs */
 	unsigned int ocseq;			/* Current outgoing seqno */
 	unsigned int icseq;			/* Current incoming seqno */
+	unsigned int dcseq;			/* Dialog seqno */
 	ast_group_t callgroup;			/* Call group */
 	ast_group_t pickupgroup;		/* Pickup group */
 	int lastinvite;				/* Last Cseq of invite */
@@ -4630,6 +4631,7 @@
 			ast_verbose("%d headers, %d lines\n", p->initreq.headers, p->initreq.lines);
 	}
 	p->lastinvite = p->ocseq;
+	p->dcseq = p->ocseq;
 	return send_request(p, &req, init ? 2 : 1, p->ocseq);
 }
 
@@ -10306,7 +10308,8 @@
 		} else if (p->ocseq && (p->ocseq < seqno)) {
 			ast_log(LOG_DEBUG, "Ignoring out of order response %d (expecting %d)\n", seqno, p->ocseq);
 			return -1;
-		} else if (p->ocseq && (p->ocseq != seqno)) {
+		} else if ((p->ocseq && (p->ocseq != seqno)) &&
+			   (p->dcseq && (p->dcseq != seqno))) {
 			/* ignore means "don't do anything with it" but still have to 
 			   respond appropriately  */
 			ignore=1;