diff --git a/openbsc/src/e1_config.c b/openbsc/src/e1_config.c
index 9c9f40c..addc9fe 100644
--- a/openbsc/src/e1_config.c
+++ b/openbsc/src/e1_config.c
@@ -24,6 +24,7 @@
 	struct e1inp_line *line;
 	struct e1inp_ts *sign_ts;
 	struct e1inp_sign_link *oml_link, *rsl_link;
+	struct gsm_bts_trx *trx = bts->c0;
 
 	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
 	if (!line)
@@ -37,13 +38,13 @@
 	/* create signalling links for TS1 */
 	sign_ts = &line->ts[1-1];
 	oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
-					  bts->c0, TEI_OML, SAPI_OML);
+					  trx, TEI_OML, SAPI_OML);
 	rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
-					  bts->c0, TEI_RSL, SAPI_RSL);
+					  trx, TEI_RSL, SAPI_RSL);
 
 	/* create back-links from bts/trx */
 	bts->oml_link = oml_link;
-	bts->c0->rsl_link = rsl_link;
+	trx->rsl_link = rsl_link;
 
 	/* enable subchannel demuxer on TS2 */
 	subch_demux_activate(&line->ts[2-1].trau.demux, 1);
@@ -56,18 +57,31 @@
 	subch_demux_activate(&line->ts[3-1].trau.demux, 2);
 	subch_demux_activate(&line->ts[3-1].trau.demux, 3);
 
-#ifdef HAVE_TRX1
-	/* create E1 timeslots for TRAU frames of TRX1 */
-	e1inp_ts_config(&line->ts[4-1], line, E1INP_TS_TYPE_TRAU);
-	e1inp_ts_config(&line->ts[5-1], line, E1INP_TS_TYPE_TRAU);
+	trx = gsm_bts_trx_num(bts, 1);
+	if (trx) {
+		/* create E1 timeslots for TRAU frames of TRX1 */
+		e1inp_ts_config(&line->ts[4-1], line, E1INP_TS_TYPE_TRAU);
+		e1inp_ts_config(&line->ts[5-1], line, E1INP_TS_TYPE_TRAU);
 
-	/* create RSL signalling link for TRX1 */
-	sign_ts = &line->ts[1-1];
-	rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
-					  &bts->trx[1], TEI_RSL+1, SAPI_RSL);
-	/* create back-links from trx */
-	bts->trx[1].rsl_link = rsl_link;
-#endif
+		/* create RSL signalling link for TRX1 */
+		sign_ts = &line->ts[1-1];
+		rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+					  trx, TEI_RSL+1, SAPI_RSL);
+		/* create back-links from trx */
+		trx->rsl_link = rsl_link;
+
+		/* enable subchannel demuxer on TS2 */
+		subch_demux_activate(&line->ts[4-1].trau.demux, 0);
+		subch_demux_activate(&line->ts[4-1].trau.demux, 1);
+		subch_demux_activate(&line->ts[4-1].trau.demux, 2);
+		subch_demux_activate(&line->ts[4-1].trau.demux, 3);
+
+		/* enable subchannel demuxer on TS3 */
+		subch_demux_activate(&line->ts[5-1].trau.demux, 0);
+		subch_demux_activate(&line->ts[5-1].trau.demux, 1);
+		subch_demux_activate(&line->ts[5-1].trau.demux, 2);
+		subch_demux_activate(&line->ts[5-1].trau.demux, 3);
+	}
 
 	return mi_setup(cardnr, line, release_l2);
 }