diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index 62db17a..13d1b09 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -78,7 +78,7 @@
 	struct timer_list pong_timeout;
 
 	/* mgcp related code */
-	int endpoint_status[32];
+	char *_endpoint_status;
 	int last_endpoint;
 
 	/* a back pointer */
@@ -124,6 +124,9 @@
 
 	int forbid_paging;
 
+	/* audio handling */
+	int number_multiplexes;
+
 	/* backpointer */
 	struct bsc_nat *nat;
 
diff --git a/openbsc/src/nat/bsc_mgcp_utils.c b/openbsc/src/nat/bsc_mgcp_utils.c
index aacfce6..d814f0d 100644
--- a/openbsc/src/nat/bsc_mgcp_utils.c
+++ b/openbsc/src/nat/bsc_mgcp_utils.c
@@ -38,18 +38,33 @@
 #include <errno.h>
 #include <unistd.h>
 
+static int bsc_init_endps_if_needed(struct bsc_connection *con)
+{
+	/* we have done that */
+	if (con->_endpoint_status)
+		return 0;
+
+	/* we have no config... */
+	if (!con->cfg)
+		return -1;
+
+	con->_endpoint_status = talloc_zero_array(con, char,
+						  (32 * con->cfg->number_multiplexes) + 1);
+	return con->_endpoint_status == NULL;
+}
+
 static int bsc_assign_endpoint(struct bsc_connection *bsc, struct sccp_connections *con)
 {
-	const int number_endpoints = ARRAY_SIZE(bsc->endpoint_status);
+	const int number_endpoints = 31 * bsc->cfg->number_multiplexes;
 	int i;
 
-	for (i = 1; i < number_endpoints; ++i) {
+	for (i = 1; i <= number_endpoints; ++i) {
 		int endpoint = (bsc->last_endpoint + i) % number_endpoints;
 		if (endpoint == 0)
 			endpoint = 1;
 
-		if (bsc->endpoint_status[endpoint] == 0) {
-			bsc->endpoint_status[endpoint] = 1;
+		if (bsc->_endpoint_status[endpoint] == 0) {
+			bsc->_endpoint_status[endpoint] = 1;
 			con->bsc_endp = endpoint;
 			bsc->last_endpoint = endpoint;
 			return 0;
@@ -119,6 +134,8 @@
 	}
 
 	con->msc_endp = endp;
+	if (bsc_init_endps_if_needed(con->bsc) != 0)
+		return -1;
 	if (bsc_assign_endpoint(con->bsc, con) != 0)
 		return -1;
 
@@ -202,10 +219,10 @@
 void bsc_mgcp_dlcx(struct sccp_connections *con)
 {
 	/* send a DLCX down the stream */
-	if (con->bsc_endp != -1) {
-		if (con->bsc->endpoint_status[con->bsc_endp] != 1)
+	if (con->bsc_endp != -1 && con->bsc->_endpoint_status) {
+		if (con->bsc->_endpoint_status[con->bsc_endp] != 1)
 			LOGP(DNAT, LOGL_ERROR, "Endpoint 0x%x was not in use\n", con->bsc_endp);
-		con->bsc->endpoint_status[con->bsc_endp] = 0;
+		con->bsc->_endpoint_status[con->bsc_endp] = 0;
 		bsc_mgcp_send_dlcx(con->bsc, con->bsc_endp);
 		bsc_mgcp_free_endpoint(con->bsc->nat, con->msc_endp);
 	}
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index 7b75fa5..0470387 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -126,6 +126,7 @@
 	conf->token = talloc_strdup(conf, token);
 	conf->nr = nat->num_bsc;
 	conf->nat = nat;
+	conf->number_multiplexes = 1;
 
 	INIT_LLIST_HEAD(&conf->lac_list);
 
diff --git a/openbsc/src/nat/bsc_nat_vty.c b/openbsc/src/nat/bsc_nat_vty.c
index 532e790..01bee74 100644
--- a/openbsc/src/nat/bsc_nat_vty.c
+++ b/openbsc/src/nat/bsc_nat_vty.c
@@ -172,15 +172,21 @@
 	int i;
 
 	llist_for_each_entry(con, &_nat->bsc_connections, list_entry) {
+		int endpoints;
 		if (!con->cfg)
 			continue;
 		if (con->cfg->nr != nr)
 			continue;
 
+		/* this bsc has no audio endpoints yet */
+		if (!con->_endpoint_status)
+			continue;
+
 		vty_out(vty, "MGCP Status for %d%s", con->cfg->nr, VTY_NEWLINE);
-		for (i = 1; i < ARRAY_SIZE(con->endpoint_status); ++i)
+		endpoints = 31 * con->cfg->number_multiplexes;
+		for (i = 1; i <= endpoints; ++i)
 			vty_out(vty, " Endpoint 0x%x %s%s", i,
-				con->endpoint_status[i] == 0 ? "free" : "allocated",
+				con->_endpoint_status[i] == 0 ? "free" : "allocated",
 				VTY_NEWLINE);
 		break;
 	}
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index c5edbfe..d5b1ab1 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -479,7 +479,7 @@
 		fprintf(stderr, "Assigned timeslot should have been 1.\n");
 		abort();
 	}
-	if (con.bsc->endpoint_status[0x1b] != 1) {
+	if (con.bsc->_endpoint_status[0x1b] != 1) {
 		fprintf(stderr, "The status on the BSC is wrong.\n");
 		abort();
 	}
@@ -498,7 +498,7 @@
 
 	bsc_mgcp_dlcx(&con);
 	if (con.bsc_endp != -1 || con.msc_endp != -1 ||
-	    con.bsc->endpoint_status[1] != 0 || con.bsc->last_endpoint != 0x1b) {
+	    con.bsc->_endpoint_status[1] != 0 || con.bsc->last_endpoint != 0x1b) {
 		fprintf(stderr, "Clearing should remove the mapping.\n");
 		abort();
 	}