diff --git a/msc_tests/MSC_Tests.ttcn b/msc_tests/MSC_Tests.ttcn
index 74d1b93..426f479 100644
--- a/msc_tests/MSC_Tests.ttcn
+++ b/msc_tests/MSC_Tests.ttcn
@@ -126,6 +126,11 @@
 	map(self:MSCVTY, system:MSCVTY);
 	f_vty_set_prompts(MSCVTY);
 	f_vty_transceive(MSCVTY, "enable");
+
+	/* set some defaults */
+	f_vty_config(MSCVTY, "network", "authentication optional");
+	f_vty_config(MSCVTY, "msc", "assign-tmsi");
+	f_vty_config(MSCVTY, "network", "encryption a5 0");
 }
 
 template PDU_BSSAP ts_BSSAP_BSSMAP := {
@@ -374,8 +379,6 @@
 testcase TC_lu_imsi_noauth_tmsi() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_imsi_noauth_tmsi), testcasename(), 1);
 	vc_conn.done;
@@ -388,7 +391,6 @@
 testcase TC_lu_imsi_noauth_notmsi() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 	f_vty_config(MSCVTY, "msc", "no assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_imsi_noauth_notmsi), testcasename(), 2);
@@ -419,7 +421,6 @@
 testcase TC_lu_imsi_reject() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_imsi_reject), testcasename(), 3);
 	vc_conn.done;
@@ -450,7 +451,6 @@
 testcase TC_lu_imsi_timeout_gsup() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_imsi_timeout_gsup), testcasename(), 4);
 	vc_conn.done;
@@ -506,7 +506,6 @@
 testcase TC_cmserv_imsi_unknown() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 	vc_conn := f_start_handler(refers(f_tc_cmserv_imsi_unknown), testcasename(), 6);
 	vc_conn.done;
 }
@@ -557,7 +556,6 @@
 testcase TC_lu_and_mo_call() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_and_mo_call), testcasename(), 7);
 	vc_conn.done;
@@ -722,7 +720,6 @@
 testcase TC_lu_by_imei() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_by_imei), testcasename(), 12);
 	vc_conn.done;
@@ -770,7 +767,6 @@
 testcase TC_lu_by_tmsi_noauth_unknown() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
 
 	vc_conn := f_start_handler(refers(f_tc_lu_tmsi_noauth_unknown), testcasename(), 13);
 	vc_conn.done;
@@ -933,8 +929,6 @@
 testcase TC_emerg_call_imsi() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_emerg_call_imsi), testcasename(), 18);
 	vc_conn.done;
@@ -959,8 +953,6 @@
 testcase TC_cm_serv_req_vgcs_reject() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_vgcs_reject), testcasename(), 19);
 	vc_conn.done;
@@ -985,8 +977,6 @@
 testcase TC_cm_serv_req_vbs_reject() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_vbs_reject), testcasename(), 20);
 	vc_conn.done;
@@ -1011,8 +1001,6 @@
 testcase TC_cm_serv_req_lcs_reject() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_lcs_reject), testcasename(), 21);
 	vc_conn.done;
@@ -1037,8 +1025,6 @@
 testcase TC_cm_reest_req_reject() runs on MTC_CT {
 	var BSC_ConnHdlr vc_conn;
 	f_init();
-	f_vty_config(MSCVTY, "network", "authentication optional");
-	f_vty_config(MSCVTY, "msc", "assign-tmsi");
 
 	vc_conn := f_start_handler(refers(f_tc_cm_reest_req_reject), testcasename(), 22);
 	vc_conn.done;