diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index d81056acf..347d5b710 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -74,28 +74,36 @@ typedef struct _LinphoneCore LinphoneCore;
  * Use with #LCSipTransports
  * @ingroup initializing
  */
-#define LC_SIP_TRANSPORT_RANDOM -1
+#define LC_SIP_TRANSPORT_RANDOM (-1)
+
+/**
+ * Don't create any server socket for this transport, ie don't bind on any port.
+ * Use with #LCSipTransports
+ * @ingroup initializing
+**/
+#define LC_SIP_TRANSPORT_DONTBIND (-2)
 
 /**
  * Linphone core SIP transport ports.
+ * Special values LC_SIP_TRANSPORT_RANDOM, LC_SIP_TRANSPORT_RANDOM, #define LC_SIP_TRANSPORT_DONTBIND can be used.
  * Use with #linphone_core_set_sip_transports
  * @ingroup initializing
  */
 typedef struct _LCSipTransports{
 	/**
-	 * udp port to listening on, negative value if not set
-	 * */
+	 * SIP/UDP port.
+	 **/
 	int udp_port;
 	/**
-	 * tcp port to listening on, negative value if not set
+	 * SIP/TCP port
 	 * */
 	int tcp_port;
 	/**
-	 * dtls port to listening on, negative value if not set
+	 * SIP/DTLS port
 	 * */
 	int dtls_port;
 	/**
-	 * tls port to listening on, negative value if not set
+	 * SIP/TLS port
 	 * */
 	int tls_port;
 } LCSipTransports;
diff --git a/coreapi/misc.c b/coreapi/misc.c
index afc11a2f5..7b16e4f91 100644
--- a/coreapi/misc.c
+++ b/coreapi/misc.c
@@ -1915,13 +1915,9 @@ static void _create_ice_check_lists_and_parse_ice_attributes(LinphoneCall *call,
 				else remote_family = AF_INET;
 				if (strchr(addr, ':') != NULL) family = AF_INET6;
 				else family = AF_INET;
-				if (remote_family == family) {
-					ice_add_losing_pair(cl, j + 1, family, remote_candidate->addr, remote_candidate->port, addr, port);
-					losing_pairs_added = TRUE;
-				} else {
-					ms_error("Cannot add ICE losing pair this local and remote candidates having different address families.");
-					
-				}
+				
+				ice_add_losing_pair(cl, j + 1, remote_family, remote_candidate->addr, remote_candidate->port, family, addr, port);
+				losing_pairs_added = TRUE;
 			}
 			if (losing_pairs_added == TRUE) ice_check_list_check_completed(cl);
 		}
diff --git a/mediastreamer2 b/mediastreamer2
index 4a5d8ead9..c79c27297 160000
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 4a5d8ead921dc66d8d309ea449998f7f6b0e0cbb
+Subproject commit c79c27297585f81a20bad994fc435a14722d43f8
diff --git a/tester/call_single_tester.c b/tester/call_single_tester.c
index bbff03683..936c23be3 100644
--- a/tester/call_single_tester.c
+++ b/tester/call_single_tester.c
@@ -4911,7 +4911,49 @@ static void call_with_ice_in_ipv4_with_v6_enabled(void) {
 		marie = linphone_core_manager_new("marie_v4proxy_rc");
 		pauline = linphone_core_manager_new("pauline_v4proxy_rc");
 
-		_call_with_ice_base(pauline,marie,TRUE,TRUE,TRUE,FALSE);
+		_call_with_ice_base(marie,pauline,TRUE,TRUE,TRUE,TRUE);
+		linphone_core_manager_destroy(marie);
+		linphone_core_manager_destroy(pauline);
+	} else ms_warning("Test skipped, need both ipv6 and v4 available");
+}
+
+static void call_with_ice_ipv4_to_ipv6(void) {
+	LinphoneCoreManager* marie;
+	LinphoneCoreManager* pauline;
+
+	if (liblinphone_tester_ipv4_available() && liblinphone_tester_ipv6_available()){
+		marie = linphone_core_manager_new("marie_v4proxy_rc");
+		pauline = linphone_core_manager_new("pauline_tcp_rc");
+
+		_call_with_ice_base(marie,pauline,TRUE,TRUE,TRUE,TRUE);
+		linphone_core_manager_destroy(marie);
+		linphone_core_manager_destroy(pauline);
+	} else ms_warning("Test skipped, need both ipv6 and v4 available");
+}
+
+static void call_with_ice_ipv6_to_ipv4(void) {
+	LinphoneCoreManager* marie;
+	LinphoneCoreManager* pauline;
+
+	if (liblinphone_tester_ipv4_available() && liblinphone_tester_ipv6_available()){
+		marie = linphone_core_manager_new("marie_rc");
+		pauline = linphone_core_manager_new("pauline_v4proxy_rc");
+
+		_call_with_ice_base(marie, pauline,TRUE,TRUE,TRUE,TRUE);
+		linphone_core_manager_destroy(marie);
+		linphone_core_manager_destroy(pauline);
+	} else ms_warning("Test skipped, need both ipv6 and v4 available");
+}
+
+static void call_with_ice_ipv6_to_ipv6(void) {
+	LinphoneCoreManager* marie;
+	LinphoneCoreManager* pauline;
+
+	if (liblinphone_tester_ipv4_available() && liblinphone_tester_ipv6_available()){
+		marie = linphone_core_manager_new("marie_rc");
+		pauline = linphone_core_manager_new("pauline_tcp_rc");
+
+		_call_with_ice_base(marie, pauline,TRUE,TRUE,TRUE,TRUE);
 		linphone_core_manager_destroy(marie);
 		linphone_core_manager_destroy(pauline);
 	} else ms_warning("Test skipped, need both ipv6 and v4 available");
@@ -4934,7 +4976,10 @@ test_t call_tests[] = {
 	TEST_NO_TAG("Direct call over IPv6", direct_call_over_ipv6),
 	TEST_NO_TAG("Call IPv6 to IPv4 without relay", v6_to_v4_call_without_relay),
 	TEST_NO_TAG("IPv6 call over NAT64", v6_call_over_nat_64),
-	TEST_NO_TAG("Call with ICE in IPv4 with IPv6 enabled", call_with_ice_in_ipv4_with_v6_enabled),
+	TEST_ONE_TAG("Call with ICE in IPv4 with IPv6 enabled", call_with_ice_in_ipv4_with_v6_enabled, "ICE"),
+	TEST_ONE_TAG("Call with ICE IPv4 to IPv6", call_with_ice_ipv4_to_ipv6, "ICE"),
+	TEST_ONE_TAG("Call with ICE IPv6 to IPv4", call_with_ice_ipv6_to_ipv4, "ICE"),
+	TEST_ONE_TAG("Call with ICE IPv6 to IPv6", call_with_ice_ipv6_to_ipv6, "ICE"),
 	TEST_NO_TAG("Outbound call with multiple proxy possible", call_outbound_with_multiple_proxy),
 	TEST_NO_TAG("Audio call recording", audio_call_recording_test),
 #if 0 /* not yet activated because not implemented */