diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 49a2601da..934ebefa6 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -466,6 +466,7 @@ static void sip_config_read(LinphoneCore *lc)
 
 	sal_use_rport(lc->sal,lp_config_get_int(lc->config,"sip","use_rport",1));
 	sal_use_101(lc->sal,lp_config_get_int(lc->config,"sip","use_101",1));
+	sal_reuse_authorization(lc->sal, lp_config_get_int(lc->config,"sip","reuse_authorization",0));
 
 	tmp=lp_config_get_int(lc->config,"sip","use_rfc2833",0);
 	linphone_core_set_use_rfc2833_for_dtmf(lc,tmp);
diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index 2492e8f61..f858f8d17 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -1206,6 +1206,15 @@ extern "C" void Java_org_linphone_core_LinphoneCoreImpl_setDownloadBandwidth(JNI
 extern "C" void Java_org_linphone_core_LinphoneCoreImpl_setUploadBandwidth(JNIEnv *env, jobject thiz, jlong lc, jint bw){
 	linphone_core_set_upload_bandwidth((LinphoneCore *)lc, (int) bw);
 }
+
+extern "C" void Java_org_linphone_core_LinphoneCoreImpl_setDownloadPtime(JNIEnv *env, jobject thiz, jlong lc, jint ptime){
+	linphone_core_set_download_ptime((LinphoneCore *)lc, (int) ptime);
+}
+
+extern "C" void Java_org_linphone_core_LinphoneCoreImpl_setUploadPtime(JNIEnv *env, jobject thiz, jlong lc, jint ptime){
+	linphone_core_set_upload_ptime((LinphoneCore *)lc, (int) ptime);
+}
+
 extern "C" int Java_org_linphone_core_LinphoneProxyConfigImpl_getState(JNIEnv*  env,jobject thiz,jlong ptr) {
 	return (int) linphone_proxy_config_get_state((const LinphoneProxyConfig *) ptr);
 }
diff --git a/coreapi/sal.c b/coreapi/sal.c
index 92b82d52c..b237e9ad9 100644
--- a/coreapi/sal.c
+++ b/coreapi/sal.c
@@ -329,3 +329,4 @@ void sal_auth_info_delete(const SalAuthInfo* auth_info) {
 	if (auth_info->password) ms_free(auth_info->password);
 	ms_free((void*)auth_info);
 }
+
diff --git a/coreapi/sal.h b/coreapi/sal.h
index 8ab339a6e..6a27f1331 100644
--- a/coreapi/sal.h
+++ b/coreapi/sal.h
@@ -267,6 +267,7 @@ void sal_set_keepalive_period(Sal *ctx,unsigned int value);
 unsigned int sal_get_keepalive_period(Sal *ctx);
 void sal_use_session_timers(Sal *ctx, int expires);
 void sal_use_double_registrations(Sal *ctx, bool_t enabled);
+void sal_reuse_authorization(Sal *ctx, bool_t enabled);
 void sal_use_one_matching_codec_policy(Sal *ctx, bool_t one_matching_codec);
 void sal_use_rport(Sal *ctx, bool_t use_rports);
 void sal_use_101(Sal *ctx, bool_t use_101);
diff --git a/coreapi/sal_eXosip2.c b/coreapi/sal_eXosip2.c
index 363adfdeb..7c04454b4 100644
--- a/coreapi/sal_eXosip2.c
+++ b/coreapi/sal_eXosip2.c
@@ -193,6 +193,7 @@ void sal_op_release(SalOp *op){
 		eXosip_event_free(op->pending_auth);
 	if (op->rid!=-1){
 		sal_remove_register(op->base.root,op->rid);
+		eXosip_register_remove(op->rid);
 	}
 	if (op->cid!=-1){
 		ms_message("Cleaning cid %i",op->cid);
@@ -279,6 +280,7 @@ Sal * sal_init(){
 	sal->double_reg=TRUE;
 	sal->use_rports=TRUE;
 	sal->use_101=TRUE;
+	sal->reuse_authorization=FALSE;
 	return sal;
 }
 
@@ -797,7 +799,7 @@ int sal_call_terminate(SalOp *h){
 	eXosip_lock();
 	err=eXosip_call_terminate(h->cid,h->did);
 	eXosip_unlock();
-	pop_auth_from_exosip();
+	if (!h->base.root->reuse_authorization) pop_auth_from_exosip();
 	if (err!=0){
 		ms_warning("Exosip could not terminate the call: cid=%i did=%i", h->cid,h->did);
 	}
@@ -820,7 +822,7 @@ void sal_op_authenticate(SalOp *h, const SalAuthInfo *info){
 		eXosip_default_action(h->pending_auth);
 		eXosip_unlock();
 		ms_message("eXosip_default_action() done");
-		pop_auth_from_exosip();
+		if (!h->base.root->reuse_authorization) pop_auth_from_exosip();
 		
 		if (h->auth_info) sal_auth_info_delete(h->auth_info); /*if already exist*/
 		h->auth_info=sal_auth_info_clone(info); /*store auth info for subsequent request*/
@@ -2211,3 +2213,6 @@ int sal_call_update(SalOp *h, const char *subject){
 	eXosip_unlock();
 	return err;
 }
+void sal_reuse_authorization(Sal *ctx, bool_t value) {
+	ctx->reuse_authorization=value;
+}
diff --git a/coreapi/sal_eXosip2.h b/coreapi/sal_eXosip2.h
index a050f5133..201cb65a9 100644
--- a/coreapi/sal_eXosip2.h
+++ b/coreapi/sal_eXosip2.h
@@ -44,6 +44,7 @@ struct Sal{
 	bool_t double_reg;
 	bool_t use_rports;
 	bool_t use_101;
+	bool_t reuse_authorization;
 };
 
 struct SalOp{
diff --git a/java/common/org/linphone/core/LinphoneCore.java b/java/common/org/linphone/core/LinphoneCore.java
index 1c7dd2ff9..4afe7182f 100644
--- a/java/common/org/linphone/core/LinphoneCore.java
+++ b/java/common/org/linphone/core/LinphoneCore.java
@@ -531,6 +531,18 @@ public interface LinphoneCore {
 	void setUploadBandwidth(int bw);
 
 	void setDownloadBandwidth(int bw);
+	
+	/**
+	 * Sets audio packetization interval suggested for remote end.
+	 * @param ptime packetization interval in milliseconds
+	 */
+	void setDownloadPtime(int ptime);
+	
+	/**
+	 * Sets audio packetization interval sent to remote end.
+	 * @param ptime packetization interval in milliseconds
+	 */
+	void setUploadPtime(int ptime);
 
 	void setPreferredVideoSize(VideoSize vSize);