diff -rauN -x .svn linphone-r745/coreapi/linphonecore.c linphone-r745_rfc/coreapi/linphonecore.c
--- linphone-r745/coreapi/linphonecore.c	2009-11-03 14:06:43.000000000 +0100
+++ linphone-r745_rfc/coreapi/linphonecore.c	2009-11-03 14:51:35.000000000 +0100
@@ -438,6 +438,9 @@
 	port=lp_config_get_int(lc->config,"sip","use_info",0);
 	linphone_core_set_use_info_for_dtmf(lc,port);
 
+	port=lp_config_get_int(lc->config,"sip","use_rfc2833",0);
+	linphone_core_set_use_rfc2833_for_dtmf(lc,port);
+
 	ipv6=lp_config_get_int(lc->config,"sip","use_ipv6",-1);
 	if (ipv6==-1){
 		ipv6=0;
@@ -929,6 +932,16 @@
 	lc->sip_conf.use_info=use_info;
 }
 
+bool_t linphone_core_get_use_rfc2833_for_dtmf(LinphoneCore *lc)
+{
+	return lc->sip_conf.use_rfc2833;
+}
+
+void linphone_core_set_use_rfc2833_for_dtmf(LinphoneCore *lc,bool_t use_rfc2833)
+{
+	lc->sip_conf.use_rfc2833=use_rfc2833;
+}
+
 int linphone_core_get_sip_port(LinphoneCore *lc)
 {
 	return lc->sip_conf.sip_port;
@@ -2188,12 +2201,20 @@
 
 void linphone_core_send_dtmf(LinphoneCore *lc,char dtmf)
 {
-	if (linphone_core_get_use_info_for_dtmf(lc)==0){
+	/*By default we send DTMF RFC2833 if we do not have enabled SIP_INFO but we can also send RFC2833 and SIP_INFO*/
+	if (linphone_core_get_use_rfc2833_for_dtmf(lc)!=0 || linphone_core_get_use_info_for_dtmf(lc)==0)
+	{
 		/* In Band DTMF */
 		if (lc->audiostream!=NULL){
 			audio_stream_send_dtmf(lc->audiostream,dtmf);
 		}
-	}else{
+		else
+		{
+			ms_error("we cannot send RFC2833 dtmf when we are not in communication");
+		}
+	}
+	if (linphone_core_get_use_info_for_dtmf(lc)!=0)
+	{
 		char dtmf_body[1000];
 		char clen[10];
 		osip_message_t *msg=NULL;
@@ -2617,6 +2638,7 @@
 	lp_config_set_string(lc->config,"sip","contact",config->contact);
 	lp_config_set_int(lc->config,"sip","inc_timeout",config->inc_timeout);
 	lp_config_set_int(lc->config,"sip","use_info",config->use_info);
+	lp_config_set_int(lc->config,"sip","use_rfc2833",config->use_rfc2833);
 	lp_config_set_int(lc->config,"sip","use_ipv6",config->ipv6_enabled);
 	lp_config_set_int(lc->config,"sip","register_only_when_network_is_up",config->register_only_when_network_is_up);
 	for(elem=config->proxies,i=0;elem!=NULL;elem=ms_list_next(elem),i++){
diff -rauN -x .svn linphone-r745/coreapi/linphonecore.h linphone-r745_rfc/coreapi/linphonecore.h
--- linphone-r745/coreapi/linphonecore.h	2009-11-03 14:06:43.000000000 +0100
+++ linphone-r745_rfc/coreapi/linphonecore.h	2009-11-03 14:47:49.000000000 +0100
@@ -61,6 +61,7 @@
 	MSList *deleted_proxies;
 	int inc_timeout;	/*timeout after an un-answered incoming call is rejected*/
 	bool_t use_info;
+	bool_t use_rfc2833;	/*force RFC2833 to be sent*/
 	bool_t guess_hostname;
 	bool_t loopback_only;
 	bool_t ipv6_enabled;
@@ -631,6 +632,10 @@
 
 bool_t linphone_core_get_use_info_for_dtmf(LinphoneCore *lc);
 
+void linphone_core_set_use_rfc2833_for_dtmf(LinphoneCore *lc,bool_t use_rfc2833);
+
+bool_t linphone_core_get_use_rfc2833_for_dtmf(LinphoneCore *lc);
+
 int linphone_core_get_sip_port(LinphoneCore *lc);
 
 void linphone_core_set_sip_port(LinphoneCore *lc,int port);