diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 68503dd10..32a110af8 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -116,6 +116,8 @@ modulepar {
 	FreqHopConfig mp_fh_config;
 	/* configuration for each individual transceiver */
 	TrxPars mp_trx_pars; /* see BTS_Tests.default */
+	/* default Training Sequence Code */
+	GsmTsc mp_tsc_def := 7;
 }
 
 type record of RslChannelNr ChannelNrs;
@@ -285,6 +287,8 @@ type record ConnHdlrPars {
 	RSL_IE_EncryptionInfo encr optional,
 	BtsBand bts0_band optional,
 
+	/* Training Sequence Code */
+	GsmTsc tsc,
 	/* Frequency hopping parameters */
 	FreqHopPars fhp
 };
@@ -795,6 +799,7 @@ friend template ConnHdlrPars t_Pars(template RslChannelNr chan_nr,
 	spec := omit,
 	encr := omit,
 	bts0_band := omit,
+	tsc := mp_tsc_def,
 	fhp := {
 		enabled := false,
 		maio_hsn := ts_HsnMaio(0, 0),
@@ -2177,12 +2182,10 @@ private function f_rach_req_wait_chan_rqd(integer ra) runs on ConnHdlr return Gs
 /* Tune to a dedicated channel: L1CTL only */
 private function f_l1ctl_est_dchan(L1CTL_PT pt, ConnHdlrPars pars) {
 	if (not pars.fhp.enabled) {
-		pt.send(ts_L1CTL_DM_EST_REQ_H0(pars.chan_nr,
-						7 /* TODO: mp_tsc */,
+		pt.send(ts_L1CTL_DM_EST_REQ_H0(pars.chan_nr, pars.tsc,
 						mp_trx_pars[0].arfcn));
 	} else {
-		pt.send(ts_L1CTL_DM_EST_REQ_H1(pars.chan_nr,
-						7 /* TODO: mp_tsc */,
+		pt.send(ts_L1CTL_DM_EST_REQ_H1(pars.chan_nr, pars.tsc,
 						pars.fhp.maio_hsn.hsn,
 						pars.fhp.maio_hsn.maio,
 						pars.fhp.ma));
@@ -2204,9 +2207,9 @@ private function f_est_dchan(boolean encr_enable := false, RSL_IE_List more_ies
 
 	/* Craft channel description (with or without frequency hopping parameters) */
 	if (g_pars.fhp.enabled) {
-		ch_desc := valueof(ts_ChanDescH1(g_pars.chan_nr, g_pars.fhp.maio_hsn));
+		ch_desc := valueof(ts_ChanDescH1(g_pars.chan_nr, g_pars.fhp.maio_hsn, g_pars.tsc));
 	} else {
-		ch_desc := valueof(ts_ChanDescH0(g_pars.chan_nr, mp_trx_pars[0].arfcn));
+		ch_desc := valueof(ts_ChanDescH0(g_pars.chan_nr, mp_trx_pars[0].arfcn, g_pars.tsc));
 	}
 
 	/* Send IMM.ASS via CCHAN */
@@ -3764,7 +3767,8 @@ private function f_TC_imm_ass(integer num_total, float sleep_s, float exp_pass)
 
 	for (var integer i := 0; i < num_total; i := i+1) {
 		var ChannelDescription ch_desc := valueof(ts_ChanDescH0(ts_RslChanNr_SDCCH4(0, 0),
-									mp_trx_pars[0].arfcn));
+									mp_trx_pars[0].arfcn,
+									mp_tsc_def));
 		var GsmRrMessage ia := valueof(ts_IMM_ASS(42, i, 5, ch_desc, c_MA_null));
 		var octetstring ia_enc := enc_GsmRrMessage(ia);
 		RSL_CCHAN.send(ts_ASP_RSL_UD(ts_RSL_IMM_ASSIGN(ia_enc, 0)));
diff --git a/bts/BTS_Tests_LAPDm.ttcn b/bts/BTS_Tests_LAPDm.ttcn
index a4fa2e8b2..6d252e0af 100644
--- a/bts/BTS_Tests_LAPDm.ttcn
+++ b/bts/BTS_Tests_LAPDm.ttcn
@@ -50,11 +50,13 @@ function f_switch_dcch() runs on ConnHdlr {
 	/* Craft channel description (with or without frequency hopping parameters) */
 	if (g_pars.fhp.enabled) {
 		sw_req.chan_desc := valueof(ts_ChanDescH1(g_pars.chan_nr,
-							  g_pars.fhp.maio_hsn));
+							  g_pars.fhp.maio_hsn,
+							  g_pars.tsc));
 		sw_req.ma := g_pars.fhp.ma;
 	} else {
 		sw_req.chan_desc := valueof(ts_ChanDescH0(g_pars.chan_nr,
-							  mp_trx_pars[0].arfcn));
+							  mp_trx_pars[0].arfcn,
+							  g_pars.tsc));
 		sw_req.ma := omit;
 	}
 
diff --git a/bts/BTS_Tests_SMSCB.ttcn b/bts/BTS_Tests_SMSCB.ttcn
index 5f06f0446..102e2ac03 100644
--- a/bts/BTS_Tests_SMSCB.ttcn
+++ b/bts/BTS_Tests_SMSCB.ttcn
@@ -259,14 +259,12 @@ private function f_smscb_setup(inout CbchTestPars pars) runs on test_CT {
 		f_l1_tune(L1CTL, ccch_mode := CCCH_MODE_COMBINED);
 
 		if (pars.fhp.enabled) {
-			L1CTL.send(ts_L1CTL_DM_EST_REQ_H1(pars.chan_nr,
-							  7 /* TODO: mp_tsc */,
+			L1CTL.send(ts_L1CTL_DM_EST_REQ_H1(pars.chan_nr, mp_tsc_def,
 							  pars.fhp.maio_hsn.hsn,
 							  pars.fhp.maio_hsn.maio,
 							  pars.fhp.ma));
 		} else {
-			L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(pars.chan_nr,
-							  7 /* TODO: mp_tsc */,
+			L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(pars.chan_nr, mp_tsc_def,
 							  mp_trx_pars[0].arfcn));
 		}
 	}