diff --git a/src/osmo-bsc/bts_siemens_bs11.c b/src/osmo-bsc/bts_siemens_bs11.c
index c8084214f..08694eab0 100644
--- a/src/osmo-bsc/bts_siemens_bs11.c
+++ b/src/osmo-bsc/bts_siemens_bs11.c
@@ -404,9 +404,16 @@ static void nm_reconfig_ts(struct gsm_bts_trx_ts *ts)
 	if (is_ipaccess_bts(ts->trx->bts))
 		return;
 
-	if (ts_is_tch(ts))
-		abis_nm_conn_terr_traf(ts, e1l->e1_nr, e1l->e1_ts,
-					e1l->e1_ts_ss);
+	switch (ts->pchan_from_config) {
+	case GSM_PCHAN_TCH_F:
+		abis_nm_conn_terr_traf(ts, e1l->e1_nr, e1l->e1_ts, e1l->e1_ts_ss);
+		break;
+	case GSM_PCHAN_TCH_H:
+		LOG_TS(ts, LOGL_ERROR, "No support for half-rate over E1 yet!\n");
+		break;
+	default:
+		break;
+	}
 }
 
 static void nm_reconfig_trx(struct gsm_bts_trx *trx)