MSC_Tests: Use enum instead of magic numbers for CM_SERVICE_TYPE

Change-Id: Ic90b4a0aa47821877a2d3566606b9c9dd5919968
diff --git a/msc_tests/BSC_ConnectionHandler.ttcn b/msc_tests/BSC_ConnectionHandler.ttcn
index 25f8daf..330f25a 100644
--- a/msc_tests/BSC_ConnectionHandler.ttcn
+++ b/msc_tests/BSC_ConnectionHandler.ttcn
@@ -101,7 +101,7 @@
 /* helper function to fully establish a dedicated channel */
 function f_establish_fully(MobileIdentityLV mi, boolean expect_auth)
 runs on BSC_ConnHdlr {
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('0001'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
 	var PDU_DTAP_MT dtap_mt;
 
 	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
diff --git a/msc_tests/MSC_Tests.ttcn b/msc_tests/MSC_Tests.ttcn
index 5976b45..566999b 100644
--- a/msc_tests/MSC_Tests.ttcn
+++ b/msc_tests/MSC_Tests.ttcn
@@ -475,7 +475,7 @@
 
 	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
 	var BSSMAP_IE_CellIdentifier cell_id := valueof(ts_CellId_CGI('262'H, '042'H, 23, 42));
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('0001'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
 
 	f_create_gsup_expect(hex2str(g_pars.imsi));
 
@@ -858,7 +858,7 @@
 /* helper function for an emergency call. caller passes in mobile identity to use */
 private function f_emerg_call(MobileIdentityLV mi) runs on BSC_ConnHdlr {
 
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('0010'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
 	f_bssap_compl_l3(l3_info);
 	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC));
 
@@ -905,7 +905,7 @@
 	g_pars := pars;
 
 	var MobileIdentityLV mi := valueof(ts_MI_IMEI_LV(g_pars.imei));
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('0010'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
 	f_bssap_compl_l3(l3_info);
 	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ('05'O)));
 	setverdict(pass);
@@ -943,7 +943,7 @@
 	f_perform_lu(false, true, true);
 
 	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('1001'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_VGCS, mi));
 	f_bssap_compl_l3(l3_info);
 	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
 	setverdict(pass);
@@ -964,7 +964,7 @@
 	f_perform_lu(false, true, true);
 
 	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('1010'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_VBS, mi));
 	f_bssap_compl_l3(l3_info);
 	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
 	setverdict(pass);
@@ -985,7 +985,7 @@
 	f_perform_lu(false, true, true);
 
 	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
-	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ('1011'B, mi));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_LCS, mi));
 	f_bssap_compl_l3(l3_info);
 	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
 	setverdict(pass);