diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index d0000d8..b6b38dd 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -71,6 +71,8 @@
 	/* local parameters of emulated HLR */
 	charstring mp_hlr_ip := "127.0.0.1";
 	integer mp_hlr_port := 4222;
+	charstring mp_mgw_ip := "127.0.0.1";
+	integer mp_mgw_port := 2427;
 
 	charstring mp_msc_mncc := "/tmp/mncc";
 }
@@ -95,10 +97,10 @@
 		unitdata_cb := refers(MGCP_Emulation.DummyUnitdataCallback)
 	}
 	var MGCP_conn_parameters pars := {
-		callagent_ip := "127.0.0.1",
+		callagent_ip := mp_msc_ip,
 		callagent_udp_port := -1,
-		mgw_ip := "127.0.0.1",
-		mgw_udp_port := 2427
+		mgw_ip := mp_mgw_ip,
+		mgw_udp_port := mp_mgw_port
 	}
 
 	vc_MGCP := MGCP_Emulation_CT.create(id);