diff --git a/openbsc/include/openbsc/gsm_04_08.h b/openbsc/include/openbsc/gsm_04_08.h
index 2f5aaa9..8df7b73 100644
--- a/openbsc/include/openbsc/gsm_04_08.h
+++ b/openbsc/include/openbsc/gsm_04_08.h
@@ -39,6 +39,9 @@
 int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn);
 int gsm48_tx_mm_auth_req(struct gsm_subscriber_connection *conn, uint8_t *rand, int key_seq);
 int gsm48_tx_mm_auth_rej(struct gsm_subscriber_connection *conn);
+int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn);
+int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
+				enum gsm48_reject_value value);
 int gsm48_send_rr_release(struct gsm_lchan *lchan);
 int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan, int want_imeisv);
 int gsm48_send_rr_app_info(struct gsm_subscriber_connection *conn, uint8_t apdu_id,
diff --git a/openbsc/src/libbsc/gsm_04_08_utils.c b/openbsc/src/libbsc/gsm_04_08_utils.c
index 8ccefd7..a0e7e5d 100644
--- a/openbsc/src/libbsc/gsm_04_08_utils.c
+++ b/openbsc/src/libbsc/gsm_04_08_utils.c
@@ -36,6 +36,7 @@
 #include <openbsc/transaction.h>
 #include <openbsc/paging.h>
 #include <openbsc/signal.h>
+#include <openbsc/bsc_api.h>
 
 /* should ip.access BTS use direct RTP streams between each other (1),
  * or should OpenBSC always act as RTP relay/proxy in between (0) ? */
@@ -649,3 +650,36 @@
 	gh->data[0] = cause;
 	return msg;
 }
+
+/* 9.2.5 CM service accept */
+int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+
+	msg->lchan = conn->lchan;
+
+	gh->proto_discr = GSM48_PDISC_MM;
+	gh->msg_type = GSM48_MT_MM_CM_SERV_ACC;
+
+	DEBUGP(DMM, "-> CM SERVICE ACK\n");
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+/* 9.2.6 CM service reject */
+int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
+				enum gsm48_reject_value value)
+{
+	struct msgb *msg;
+
+	msg = gsm48_create_mm_serv_rej(value);
+	if (!msg) {
+		LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n");
+		return -1;
+	}
+
+	DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value);
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index c41443e..3cfc455 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -804,29 +804,6 @@
 	return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ);
 }
 
-static int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
-{
-	DEBUGP(DMM, "-> CM SERVICE ACK\n");
-	return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_CM_SERV_ACC);
-}
-
-/* 9.2.6 CM service reject */
-static int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
-				enum gsm48_reject_value value)
-{
-	struct msgb *msg;
-
-	msg = gsm48_create_mm_serv_rej(value);
-	if (!msg) {
-		LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n");
-		return -1;
-	}
-
-	DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value);
-	msg->lchan = conn->lchan;
-	return gsm48_conn_sendmsg(msg, conn, NULL);
-}
-
 static int _gsm48_rx_mm_serv_req_sec_cb(
 	unsigned int hooknum, unsigned int event,
 	struct msgb *msg, void *data, void *param)