diff --git a/include/osmocom/bsc/gsm_data.h b/include/osmocom/bsc/gsm_data.h
index ecc1f0a06..545019bdc 100644
--- a/include/osmocom/bsc/gsm_data.h
+++ b/include/osmocom/bsc/gsm_data.h
@@ -1719,6 +1719,18 @@ static inline int is_nokia_bts(struct gsm_bts *bts)
 	return 0;
 }
 
+static inline int is_ericsson_bts(struct gsm_bts *bts)
+{
+	switch (bts->type) {
+	case GSM_BTS_TYPE_RBS2000:
+		return 1;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 static inline int is_e1_bts(struct gsm_bts *bts)
 {
 	switch (bts->type) {
diff --git a/src/osmo-bsc/gsm_data.c b/src/osmo-bsc/gsm_data.c
index 23a4e61b3..d3c58f5cf 100644
--- a/src/osmo-bsc/gsm_data.c
+++ b/src/osmo-bsc/gsm_data.c
@@ -1399,6 +1399,10 @@ bool trx_is_usable(const struct gsm_bts_trx *trx)
 		if (!nm_is_running(&trx->mo.nm_state) ||
 		    !nm_is_running(&trx->bb_transc.mo.nm_state))
 			return false;
+	} else if (is_ericsson_bts(trx->bts)) {
+		/* The OM2000 -> 12.21 mapping we do doesn't have separate bb_transc MO */
+		if (!nm_is_running(&trx->mo.nm_state))
+			return false;
 	}
 
 	return true;