diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index ae805e3..5d56105 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -6931,12 +6931,13 @@
 
 	/* Fill TS0 SDCCH channels (NOTE: only 3 SDCCH/4 channels are available
 	 * on CCCH+SDCCH4+CBCH) */
+	var OCT1 ra := '43'O; /* RA containing reason=originating speech call*/
 	for (i := 0; i < 3; i := i + 1) {
-		dt := f_est_dchan('23'O, i, '00010203040506'O);
+		dt := f_est_dchan(ra, i, '00010203040506'O);
 	}
 
 	/* Now the dyn ts is selected. First PDCH is released, then TCH chan is activated */
-	f_ipa_tx(0, ts_RSL_CHAN_RQD(int2oct(oct2int('23'O) + i, 1), 2342));
+	f_ipa_tx(0, ts_RSL_CHAN_RQD(int2oct(oct2int(ra) + i, 1), 2342));
 	rsl_unused := f_exp_ipa_rx(0, tr_RSL_RF_CHAN_REL(pdch_chan_nr));
 	f_ipa_tx(0, ts_RSL_RF_CHAN_REL_ACK(pdch_chan_nr));