diff --git a/ttcn/LibIms_Steps.ttcn b/ttcn/LibIms_Steps.ttcn
index 89e2661955443c4b8ddff447dc97769c0a0229b6..39b938c643a66274e3d0f7e07871bbcd24753864 100644
--- a/ttcn/LibIms_Steps.ttcn
+++ b/ttcn/LibIms_Steps.ttcn
@@ -1564,12 +1564,17 @@ module LibIms_Steps
 		 * @param p_reqHostPort parameter for outgoing BYE
 		 */
 		function f_terminateCall_UE(SipUrl p_requestUri, CallId p_CallId, inout CSeq p_cSeq, From p_from,
-		  template To p_to) runs on ImsComponent
+		  template To p_to, template RecordRoute p_recordRoute := omit) 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_UE(p_requestUri, p_CallId, p_cSeq, p_from, valueof(p_to), vc_via, vc_route));
-      
+		  if(ispresent(p_recordRoute)) {
+		    var Route v_route := { ROUTE_E, valueof(p_recordRoute.routeBody)};
+		  	f_SendBYE(m_BYE_Request_UE(p_requestUri, p_CallId, p_cSeq, p_from, valueof(p_to), vc_via, v_route));
+		  } else {
+		  	f_SendBYE(m_BYE_Request_UE(p_requestUri, p_CallId, p_cSeq, p_from, valueof(p_to), vc_via, vc_route));
+		  }
+		  
 		  tc_resp.start(PX_SIP_TRESP);
 		  alt
 		  {
diff --git a/ttcn/LibIms_Templates.ttcn b/ttcn/LibIms_Templates.ttcn
index 85cdfaaef3aa1aed6af5c550befa344a67ef94d8..f8a03092e2563f9689167708d81c979caf623fd4 100644
--- a/ttcn/LibIms_Templates.ttcn
+++ b/ttcn/LibIms_Templates.ttcn
@@ -1362,6 +1362,20 @@ group request_send {
 		},
 		messageBody := p_mb
 	  }
+
+    template ACK_Request m_ACK_Request_Mime_IMS (SipUrl p_requestUri, CallId p_callId, CSeq p_cSeq,
+    From p_from, To p_to, Via p_via,template MessageBody p_mb, template Route p_route)
+      modifies m_ACK_Request_Base
+      :=
+      {
+        msgHeader :=
+        {
+            contentLength	:= {fieldName := CONTENT_LENGTH_E, len:= f_MessageBodyLength(valueof(p_mb))},
+            contentType := {fieldName := CONTENT_TYPE_E, mediaType :=  c_mimeMultipart},
+            route		:= p_route
+        },
+        messageBody := p_mb
+      }
 	  
     template BYE_Request m_BYE_Request_IMS
         ( SipUrl p_requestUri, CallId p_callId, CSeq p_cSeq, From p_from, To p_to,