diff --git a/openbsc/src/bsc/osmo_bsc_api.c b/openbsc/src/bsc/osmo_bsc_api.c
index fdda68c..eed58be 100644
--- a/openbsc/src/bsc/osmo_bsc_api.c
+++ b/openbsc/src/bsc/osmo_bsc_api.c
@@ -20,7 +20,59 @@
 
 #include <openbsc/osmo_bsc.h>
 
+static void bsc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci)
+{
+}
+
+static void bsc_cipher_mode_compl(struct gsm_subscriber_connection *conn,
+				  struct msgb *msg, uint8_t chosen_encr)
+{
+}
+
+static void bsc_cipher_mode_reject(struct gsm_subscriber_connection *conn,
+				   struct msgb *msg, uint16_t reason)
+{
+}
+
+static int bsc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg,
+			uint16_t chosen_channel)
+{
+	return BSC_API_CONN_POL_REJECT;
+}
+
+static void bsc_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg)
+{
+}
+
+static void bsc_assign_compl(struct gsm_subscriber_connection *conn, uint16_t rr_cause)
+{
+}
+
+static void bsc_assign_fail(struct gsm_subscriber_connection *conn, uint32_t cause)
+{
+}
+
+static void bsc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause)
+{
+}
+
+static void bsc_clear_compl(struct gsm_subscriber_connection *conn)
+{
+}
+
+static struct bsc_api bsc_handler = {
+	.sapi_n_reject = bsc_sapi_n_reject,
+	.cipher_mode_compl = bsc_cipher_mode_compl,
+	.cipher_mode_reject = bsc_cipher_mode_reject,
+	.compl_l3 = bsc_compl_l3,
+	.dtap  = bsc_dtap,
+	.assign_compl = bsc_assign_compl,
+	.assign_fail = bsc_assign_fail,
+	.clear_request = bsc_clear_request,
+	.clear_compl = bsc_clear_compl,
+};
+
 struct bsc_api *osmo_bsc_api()
 {
-	return NULL;
+	return &bsc_handler;
 }
diff --git a/openbsc/src/bsc/osmo_bsc_main.c b/openbsc/src/bsc/osmo_bsc_main.c
index 90c4044..a6097db 100644
--- a/openbsc/src/bsc/osmo_bsc_main.c
+++ b/openbsc/src/bsc/osmo_bsc_main.c
@@ -21,6 +21,7 @@
 
 #include <openbsc/debug.h>
 #include <openbsc/gsm_data.h>
+#include <openbsc/osmo_bsc.h>
 #include <openbsc/osmo_bsc_rf.h>
 #include <openbsc/osmo_msc_data.h>
 #include <openbsc/signal.h>
@@ -214,6 +215,7 @@
 		fprintf(stderr, "Bootstrapping the network failed. exiting.\n");
 		exit(1);
 	}
+	bsc_api_init(bsc_gsmnet, osmo_bsc_api());
 
 	if (rf_ctl) {
 		struct osmo_msc_data *data = bsc_gsmnet->msc_data;