--- chan_sip.c.orig	2005-12-29 15:23:43.000000000 +0100
+++ chan_sip.c	2005-12-29 02:51:02.000000000 +0100
@@ -2630,8 +2630,9 @@
 	switch(condition) {
 	case AST_CONTROL_RINGING:
 		if (ast->_state == AST_STATE_RING) {
-			if (!ast_test_flag(p, SIP_PROGRESS_SENT) ||
-			    (ast_test_flag(p, SIP_PROG_INBAND) == SIP_PROG_INBAND_NEVER)) {
+			if ((!ast_test_flag(p, SIP_PROGRESS_SENT) ||
+			    (ast_test_flag(p, SIP_PROG_INBAND) == SIP_PROG_INBAND_NEVER)) &&
+			    ast_test_flag(p, SIP_PROG_INBAND) != SIP_PROG_INBAND_YES) {				
 				/* Send 180 ringing if out-of-band seems reasonable */
 				transmit_response(p, "180 Ringing", &p->initreq);
 				ast_set_flag(p, SIP_RINGING);