diff --git a/asterisk/Asterisk_Tests.ttcn b/asterisk/Asterisk_Tests.ttcn
index 4ac7eaf..5a51d1d 100644
--- a/asterisk/Asterisk_Tests.ttcn
+++ b/asterisk/Asterisk_Tests.ttcn
@@ -37,6 +37,7 @@
 
 	charstring mp_local_ims_host := "127.0.0.3";
 	integer mp_local_ims_port := 5060;
+	charstring mp_ims_domain := "ims.mnc001.mcc238.3gppnetwork.org"
 	charstring mp_ims_imsi := "238010000090828";
 
 	/* Asterisk AMI: */
@@ -88,6 +89,7 @@
 	var template (value) IMS_CallPars cp := t_IMS_CallPars(mp_local_sip_host, 1234 + 2*idx);
 	var template (value) IMS_ConnHdlrPars pars := t_IMS_Pars(mp_local_ims_host,
 								 mp_local_ims_port,
+								 mp_ims_domain,
 								 mp_ims_imsi,
 								 cp := cp);
 	return valueof(pars);
@@ -393,7 +395,7 @@
 				      c_auth_res, c_auth_ck, c_auth_ik);
 
 	AMI_CLIENT.receive(tr_AMI_Event_Registry(f_sip_SipAddr_to_str(pars.subscr.local_sip_record),
-						 "sip:" & mp_local_ims_host,
+						 "sip:" & mp_ims_domain,
 						 "Registered"));
 
 	 /* TODO: test "Action: PJSIPUnregister" */
@@ -449,9 +451,9 @@
 	sip_pars.cp.calling := sip_pars.registrar_sip_record;
 	sip_pars.cp.called := valueof(ts_SipAddr(ts_HostPort(sip_pars.remote_sip_host),
 						 ts_UserInfo(c_ext_msisdn)));
-	ims_pars.subscr.cp.calling := valueof(ts_SipAddr(ts_HostPort(ims_pars.local_sip_host),
+	ims_pars.subscr.cp.calling := valueof(ts_SipAddr(ts_HostPort(ims_pars.realm),
 							 ts_UserInfo(ims_pars.subscr.msisdn)));
-	ims_pars.subscr.cp.called := valueof(ts_SipAddr(ts_HostPort(ims_pars.local_sip_host),
+	ims_pars.subscr.cp.called := valueof(ts_SipAddr(ts_HostPort(ims_pars.realm),
 							ts_UserInfo(c_ext_msisdn)));
 
 	vc_conn_ims := f_start_handler_IMS(refers(f_TC_ims_call_mo), ims_pars);