diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 6811e38..0f89ec6 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -1093,7 +1093,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, act_type := t_RSL_IE_ActType_HO_ASYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that no DL SACCH is being received */
 	f_sacch_missing(?);
@@ -1111,7 +1111,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_ASYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that DL SACCH is being received */
 	f_sacch_present(si5);
@@ -1149,7 +1149,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, act_type := t_RSL_IE_ActType_HO_SYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that no DL SACCH is being received */
 	f_sacch_missing(?);
@@ -1167,7 +1167,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that no DL SACCH is being received */
 	f_sacch_missing(?);
@@ -1185,7 +1185,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that no DL SACCH is being received */
 	f_sacch_missing(?);
@@ -1204,7 +1204,7 @@
 	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
 	/* don't perform immediate assignment here, as we're testing non-IA case */
 	/* enable dedicated mode */
-	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Verify that DL SACCH is being received */
 	f_sacch_present(si5);
@@ -1538,7 +1538,7 @@
 
 	/* Switch the MS side (e.g. trxcon) to a dedicated channel without
 	 * waiting for Immediate Assignment and sending Access Burst */
-	f_L1CTL_DM_EST_REQ(L1CTL, { false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(g_pars.chan_nr, 7, mp_trx0_arfcn));
 
 	/* Send handover Access Burst */
 	fn := f_L1CTL_RACH(L1CTL, ho_ref, chan_nr := g_pars.chan_nr);
@@ -4312,9 +4312,7 @@
 	f_TC_pcu_act_req(0, 0, 7, true);
 
 	/* Tune trxcon to that PDCH channel */
-	L1CTL.send(ts_L1CTL_DM_EST_REQ(arfcn := { false, mp_trx0_arfcn },
-				       chan_nr := valueof(ts_RslChanNr_PDCH(7)),
-				       tsc := 7));
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(ts_RslChanNr_PDCH(7), 7, mp_trx0_arfcn));
 
 	/* Verify PTCCH/U: send several access bursts, make sure they're received */
 	for (var integer i := 0; i < 16; i := i + 1) {
@@ -4575,8 +4573,7 @@
 	f_TC_pcu_act_req(0, 0, 7, true);
 
 	/* Tune trxcon to that PDCH channel on TS7 */
-	f_L1CTL_DM_EST_REQ(L1CTL, { false, mp_trx0_arfcn },
-			   valueof(ts_RslChanNr_PDCH(7)), 7);
+	L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(ts_RslChanNr_PDCH(7), 7, mp_trx0_arfcn));
 
 	/* C/I in centiBels, test range: -256 .. +1280, step 128 */
 	for (var int16_t i := -256; i <= 1280; i := i + 128) {