diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index ecb50a0a1..1833de2fd 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -634,7 +634,7 @@ static void sip_config_read(LinphoneCore *lc)
 	lc->sip_conf.sdp_200_ack=lp_config_get_int(lc->config,"sip","sdp_200_ack",0);
 	lc->sip_conf.only_one_codec=lp_config_get_int(lc->config,"sip","only_one_codec",0);
 	lc->sip_conf.register_only_when_network_is_up=
-		lp_config_get_int(lc->config,"sip","register_only_when_network_is_up",0);
+		lp_config_get_int(lc->config,"sip","register_only_when_network_is_up",1);
 }
 
 static void rtp_config_read(LinphoneCore *lc)
@@ -1011,7 +1011,8 @@ static void linphone_core_init (LinphoneCore * lc, const LinphoneCoreVTable *vta
 	ui_config_read(lc);
 	lc->vtable.display_status(lc,_("Ready"));
         gstate_new_state(lc, GSTATE_POWER_ON, NULL);
-	lc->ready=TRUE;
+	lc->auto_net_state_mon=TRUE;
+    lc->ready=TRUE;
 }
 
 /**
@@ -1443,7 +1444,7 @@ static void linphone_core_disconnected(LinphoneCore *lc){
 }
 
 static void proxy_update(LinphoneCore *lc, time_t curtime){
-	bool_t doit=FALSE;
+
 	static time_t last_check=0;
 	static bool_t last_status=FALSE;
 	if (lc->sip_conf.register_only_when_network_is_up){
@@ -1459,9 +1460,10 @@ static void proxy_update(LinphoneCore *lc, time_t curtime){
 			}else last_status=FALSE;
 			last_check=curtime;
 		}
-		doit=last_status;
-	}else doit=TRUE;
-	if (doit) ms_list_for_each(lc->sip_conf.proxies,(void (*)(void*))&linphone_proxy_config_update);
+		linphone_core_set_network_reachable(lc,last_status);
+	}else {
+		ms_list_for_each(lc->sip_conf.proxies,(void (*)(void*))&linphone_proxy_config_update);
+	}
 }
 
 static void assign_buddy_info(LinphoneCore *lc, BuddyInfo *info){
@@ -3348,6 +3350,29 @@ static void linphone_core_uninit(LinphoneCore *lc)
 	gstate_new_state(lc, GSTATE_POWER_OFF, NULL);
 }
 
+void linphone_core_set_network_reachable(LinphoneCore* lc,bool_t isReachable) {
+	//first disable automatic mode
+	if (lc->auto_net_state_mon) {
+		ms_message("Disabling automatic network state monitoring");
+		lc->auto_net_state_mon=FALSE;
+	}
+	ms_message("Network state is now [%s]",isReachable?"UP":"DOWN");
+	// second get the list of available proxies
+	const MSList *elem=linphone_core_get_proxy_config_list(lc);
+	for(;elem!=NULL;elem=elem->next){
+		LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
+		if (linphone_proxy_config_register_enabled(cfg) ) {
+			if (!isReachable) {
+				cfg->registered=0;
+				cfg->commit=TRUE;
+			} else {
+				linphone_proxy_config_update(cfg);
+			}
+		}
+
+	}
+
+}
 /**
  * Destroys a LinphoneCore
  *
diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index 5f79f6939..afd523d0e 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -446,6 +446,10 @@ typedef enum _LinphoneWaitingState{
 typedef void * (*LinphoneWaitingCallback)(struct _LinphoneCore *lc, void *context, LinphoneWaitingState ws, const char *purpose, float progress);
 
 typedef struct _LinphoneCore LinphoneCore;
+	/*set this field to false if application manage  network connection state
+	 * In case of false, network state must be communicate to linphone core with method linphone_core_
+	 */
+	bool_t auto_net_state_mon;
 
 /* THE main API */
 
@@ -690,6 +694,16 @@ const LinphoneAddress *linphone_core_get_remote_uri(LinphoneCore *lc);
 int linphone_core_get_mtu(const LinphoneCore *lc);
 void linphone_core_set_mtu(LinphoneCore *lc, int mtu);
 
+/**
+ * This method is called by the application to notify the linphone core library when network is reachable.
+ * Calling this method with true trigger linphone to initiate a registration process for all proxy
+ * configuration with parameter register set to enable.
+ * This method disable the automatic registration mode. It means you must call this method after each network state changes
+ *
+ */
+void linphone_core_set_network_reachable(LinphoneCore* lc,bool_t value);
+
+
 void *linphone_core_get_user_data(LinphoneCore *lc);
 
 /* returns LpConfig object to read/write to the config file: usefull if you wish to extend
diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index b0ffbbf80..1c14757ca 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -261,6 +261,12 @@ extern "C" jint Java_org_linphone_core_LinphoneCoreImpl_getNumberOfCallLogs(	JNI
 		,jlong lc) {
 		return ms_list_size(linphone_core_get_call_logs((LinphoneCore*)lc));
 }
+extern "C" void Java_org_linphone_core_LinphoneCoreImpl_setNetworkStateReachable(	JNIEnv*  env
+		,jobject  thiz
+		,jlong lc
+		,jboolean isReachable) {
+		linphone_core_set_network_reachable((LinphoneCore*)lc,isReachable);
+}
 
 
 //ProxyConfig
diff --git a/coreapi/private.h b/coreapi/private.h
index bcd914439..6050449d5 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -386,6 +386,7 @@ struct _LinphoneCore
 	bool_t ready;
 	bool_t bl_refresh;
 	bool_t preview_finished;
+	bool_t auto_net_state_mon;
 };
 
 #endif /* _PRIVATE_H */