diff --git a/coreapi/conference.c b/coreapi/conference.c
index 53abfab81..3714ded9a 100644
--- a/coreapi/conference.c
+++ b/coreapi/conference.c
@@ -109,6 +109,7 @@ int linphone_core_add_to_conference(LinphoneCore *lc, LinphoneCall *call){
 	conference_check_init(&lc->conf_ctx);
 	call->params.in_conference=TRUE;
 	call->params.has_video=FALSE;
+	call->params.media_encryption=LinphoneMediaEncryptionNone;
 	params=call->params;
 	if (call->state==LinphoneCallPaused)
 		linphone_core_resume_call(lc,call);
diff --git a/coreapi/linphonecall.c b/coreapi/linphonecall.c
index 9998c02d3..4bda4d750 100644
--- a/coreapi/linphonecall.c
+++ b/coreapi/linphonecall.c
@@ -353,8 +353,7 @@ LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *fro
 	linphone_address_clean(from);
 	linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip);
 	linphone_call_init_common(call, from, to);
-	call->params.has_video=linphone_core_video_enabled(lc);
-	call->params.media_encryption=linphone_core_get_media_encryption(lc);
+	linphone_core_init_default_params(lc, &call->params);
 	call->localdesc=create_local_media_description (lc,call);
 	call->camera_active=call->params.has_video;
 	if (linphone_core_get_firewall_policy(call->core)==LinphonePolicyUseStun)
@@ -713,6 +712,15 @@ bool_t linphone_call_params_video_enabled(const LinphoneCallParams *cp){
 	return cp->has_video;
 }
 
+enum LinphoneMediaEncryption linphone_call_get_media_encryption(LinphoneCallParams *cp) {
+	return cp->media_encryption;
+}
+
+void linphone_call_params_set_media_encryption(LinphoneCallParams *cp, enum LinphoneMediaEncryption e) {
+	cp->media_encryption = e;
+}
+
+
 /**
  * Enable sending of real early media (during outgoing calls).
 **/
diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index e55235eff..715d0f2c7 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -4235,8 +4235,7 @@ LinphoneGlobalState linphone_core_get_global_state(const LinphoneCore *lc){
 
 LinphoneCallParams *linphone_core_create_default_call_parameters(LinphoneCore *lc){
 	LinphoneCallParams *p=ms_new0(LinphoneCallParams,1);
-	p->has_video=linphone_core_video_enabled(lc); 
-	p->media_encryption=linphone_core_get_media_encryption(lc);
+	linphone_core_init_default_params(lc, p);
 	return p;
 }
 
@@ -4386,3 +4385,9 @@ bool_t linphone_core_is_media_encryption_mandatory(LinphoneCore *lc) {
 void linphone_core_set_media_encryption_mandatory(LinphoneCore *lc, bool_t m) {
 	lp_config_set_int(lc->config, "sip", "media_encryption_mandatory", (int)m);
 }
+
+void linphone_core_init_default_params(LinphoneCore*lc, LinphoneCallParams *params) {
+	params->has_video=linphone_core_video_enabled(lc);
+	params->media_encryption=linphone_core_get_media_encryption(lc);	
+	params->in_conference=FALSE;
+}
diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index d849933cb..412138e71 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -183,6 +183,8 @@ typedef struct _LinphoneCallParams LinphoneCallParams;
 LinphoneCallParams * linphone_call_params_copy(const LinphoneCallParams *cp);
 void linphone_call_params_enable_video(LinphoneCallParams *cp, bool_t enabled);
 bool_t linphone_call_params_video_enabled(const LinphoneCallParams *cp);
+enum LinphoneMediaEncryption linphone_call_get_media_encryption(LinphoneCallParams *cp);
+void linphone_call_params_set_media_encryption(LinphoneCallParams *cp, enum LinphoneMediaEncryption e);
 void linphone_call_params_enable_early_media_sending(LinphoneCallParams *cp, bool_t enabled);
 bool_t linphone_call_params_early_media_sending_enabled(const LinphoneCallParams *cp);
 bool_t linphone_call_params_local_conference_mode(const LinphoneCallParams *cp);
@@ -1031,12 +1033,24 @@ int linphone_core_leave_conference(LinphoneCore *lc);
 int linphone_core_terminate_conference(LinphoneCore *lc);
 int linphone_core_get_conference_size(LinphoneCore *lc);
 
+/**
+ * Choose media encryption policy to be used for RTP packets
+ */
 void linphone_core_set_media_encryption(LinphoneCore *lc, enum LinphoneMediaEncryption menc);
 enum LinphoneMediaEncryption linphone_core_get_media_encryption(LinphoneCore *lc);
 
 bool_t linphone_core_is_media_encryption_mandatory(LinphoneCore *lc);
+/**
+ * Defines Linphone behaviour when encryption parameters negociation fails on outoing call.
+ * If set to TRUE call will fail; if set to FALSE will resend an INVITE with encryption disabled
+ */
 void linphone_core_set_media_encryption_mandatory(LinphoneCore *lc, bool_t m);
 
+/**
+ * Init call params using LinphoneCore's current configuration
+ */
+void linphone_core_init_default_params(LinphoneCore*lc, LinphoneCallParams *params);
+
 #ifdef __cplusplus
 }
 #endif