diff --git a/ttcn/LibIms_Steps.ttcn b/ttcn/LibIms_Steps.ttcn
index 4a70fda7a79f12c7bfc18dc0fc99fe3a0563bee4..e87eb2a03871a780e87e0f0bff09ac8031674763 100644
--- a/ttcn/LibIms_Steps.ttcn
+++ b/ttcn/LibIms_Steps.ttcn
@@ -37,9 +37,9 @@ module LibIms_Steps
 	 */
 		function f_setHeadersBYE(inout CSeq p_cSeq_s, in integer p_to_user) runs on ImsComponent
 		{      
-		  vc_to := f_initToHeader(p_to_user); // init of vc_to using userProfile identifier
-		  
-		  vc_from := f_initFromHeader(vc_userprofile.id, f_getRndTag()); // init of vc_from using userProfile identifier
+//		  vc_to := f_initToHeader(p_to_user); // init of vc_to using userProfile identifier
+//		  
+//		  vc_from := f_initFromHeader(vc_userprofile.id, f_getRndTag()); // init of vc_from using userProfile identifier
         
 		  vc_requestUri := f_initSipUrl(p_to_user); // Request URI of Invite is identical with To header
 		  vc_route 		:= f_route(); 		// update the route header field depending on vc_boo_route
@@ -832,7 +832,7 @@ module LibIms_Steps
 						}
 				case (c_conferenceProfile_factoryURI) {
     				p_sipUrl.userInfo := {userOrTelephoneSubscriber:=PX_IMS_SUT_CONF_FACTORY_NAME, password:=omit};
-    				p_sipUrl.hostPort := {host := PX_IMS_SUT_CONF_HOME_DOMAIN, portField := PX_IMS_SUT_CONF_PORT}
+    				p_sipUrl.hostPort := {host := PX_IMS_SUT_CONF_HOME_DOMAIN, portField := omit}
 				}						
 				};
 			return(p_sipUrl)
@@ -1271,6 +1271,7 @@ module LibIms_Steps
 		function f_terminateCall_IMS(SipUrl p_requestUri, CallId p_CallId, inout CSeq p_cSeq, From p_from,
 		  template To p_to) runs on ImsComponent
 		{
+          LibSip_Steps.f_setHeadersBYE(p_cSeq);
 		  // Sending of a BYE request to release the call and expect a final response
 		  f_SendBYE(m_BYE_Request_IMS(p_requestUri, p_CallId, p_cSeq, p_from, valueof(p_to), vc_via, vc_route));
       
diff --git a/ttcn/LibIms_Templates.ttcn b/ttcn/LibIms_Templates.ttcn
index f91635a87b9aaa4a8d9baeadf40a18bbf2d7970f..932d01bf81cd3d642f52509fed3c29ddf96e8ba9 100644
--- a/ttcn/LibIms_Templates.ttcn
+++ b/ttcn/LibIms_Templates.ttcn
@@ -165,7 +165,7 @@ group HeaderFieldTemplates{
 						hostPort := {
 							PX_IMS_TS_PCSCF_HOME_DOMAIN, PX_IMS_TS_PCSCF_PORT
 						},
-						urlParameters := omit,
+						urlParameters := { { id := "lr", paramValue := omit}},
 						headers := omit
 					}
 				},
@@ -577,7 +577,7 @@ group XMLTemplates {
     
     template Registration m_registration (template XSDAUX.anyURI p_user):= {
       p_user, // XSDAUX.anyURI aor
-      "", // XSDAUX.string id
+      "a7", // XSDAUX.string id
       init, //enumerated {active,init,terminated} state,
       omit, // record of Contact contact_list optional,
       omit // record of anytype elem_list optional
@@ -1516,15 +1516,22 @@ group request_send {
 	 * @desc INVITE message exchanged at Mw
 	 *
 	 */	
-	template INVITE_Request m_INVITE_Request_IMS
-	(SipUrl p_requestUri, CallId p_callId, CSeq p_cSeq, From p_from, To p_to,
-	  Via p_via, Contact p_contact, template Require p_require,
-	template Route p_route, template RecordRoute p_recordRoute,  template Supported p_supported, template PChargingVector p_pChargingVector, template MessageBody p_mb )
-	modifies m_INVITE_Request_Base
-	:=
-	{
-	  msgHeader :=
-	  {
+	template INVITE_Request m_INVITE_Request_IMS (
+		SipUrl p_requestUri, 
+		CallId p_callId, 
+		CSeq p_cSeq, 
+		From p_from, 
+		To p_to,
+	  	Via p_via, 
+	  	Contact p_contact, 
+	  	template Require p_require,
+		template Route p_route, 
+		template RecordRoute p_recordRoute,  
+		template Supported p_supported, 
+		template PChargingVector p_pChargingVector, 
+		template MessageBody p_mb 
+	) modifies m_INVITE_Request_Base := {
+	  msgHeader := {
 		contentLength	:= {fieldName := CONTENT_LENGTH_E, len:= f_MessageBodyLength(valueof(p_mb))},
 		contentType := {fieldName := CONTENT_TYPE_E, mediaType :=  c_sdpAplication},
 		require := p_require,
@@ -2171,6 +2178,26 @@ group request_send {
 
 		}
 	}
+	
+    template REGISTER_Request m_REGISTER_Request_IMS_3party (
+    	SipUrl p_requestUri, 
+    	CallId p_callId, 
+    	CSeq p_cSeq,
+        From p_from, 
+        To p_to, 
+        Via p_via, 
+        Contact p_contact, 
+        template Authorization p_authorization,
+        template Path p_path
+        ) modifies m_REGISTER_Request_IMS :=
+    {
+        msgHeader :=
+        {
+            path := p_path
+
+        }
+    }
+	
 	template REGISTER_Request m_REGISTER_Request_expires_IMS (SipUrl p_requestUri, CallId p_callId, CSeq p_cSeq,
 		From p_from, To p_to, Via p_via, Contact p_contact, template Authorization p_authorization, template DeltaSec p_deltaSec)
 		modifies m_REGISTER_Request_IMS :=
@@ -2644,7 +2671,7 @@ group request_receive {
 		modifies mw_REGISTER_Request_Base
 		:=
 		{
-		  msgHeader := {  authorization := ?
+		  msgHeader := {  authorization := *
 						  }
 		}