diff --git a/include/Makefile.am b/include/Makefile.am
index b52e5ea..e8fc211 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -7,6 +7,7 @@
 	osmocom/legacy_mgcp/mgcp_internal.h \
 	osmocom/legacy_mgcp/osmux.h \
 	osmocom/mgcp_client/mgcp_client.h \
+	osmocom/mgcp_client/mgcp_client_fsm.h \
 	osmocom/mgcp_client/mgcp_common.h \
 	osmocom/mgcp/mgcp.h \
 	osmocom/mgcp/mgcp_common.h \
diff --git a/include/osmocom/mgcp_client/mgcp_client_fsm.h b/include/osmocom/mgcp_client/mgcp_client_fsm.h
new file mode 100644
index 0000000..7d06178
--- /dev/null
+++ b/include/osmocom/mgcp_client/mgcp_client_fsm.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <osmocom/mgcp_client/mgcp_common.h>
+#include <osmocom/mgcp_client/mgcp_client.h>
+#include <osmocom/gsm/protocol/gsm_04_08.h>
+
+/*! This struct organizes the connection infromation one connection side
+ *  (either remote or local). It is used to pass parameters (local) to the FSM
+ *  and get responses (remote) from the FSM as pointer attached to the FSM
+ *  event.
+ * 
+ *  When modifiying a connection, the endpoint and call_id members may be left
+ *  unpopulated. The call_id field is ignored in this case. If an endpoint
+ *  identifier is supplied it is checked against the internal state to make
+ *  sure it is correct. */
+struct mgcp_conn_peer {
+	/*!< RTP connection IP-Address (optional, string e.g. "127.0.0.1") */
+	char addr[INET_ADDRSTRLEN];
+
+	/*!< RTP connection IP-Port (optional)  */
+	uint16_t port;
+
+	/*!< RTP endpoint */
+	char endpoint[MGCP_ENDPOINT_MAXLEN];
+
+	/*!< CALL ID (unique per connection) */
+	unsigned int call_id;
+};
+
+struct osmo_fsm_inst *mgcp_conn_create(struct mgcp_client *mgcp, struct osmo_fsm_inst *parent_fi, uint32_t parent_term_evt,
+				       uint32_t parent_evt, struct mgcp_conn_peer *conn_peer);
+int mgcp_conn_modify(struct osmo_fsm_inst *fi, uint32_t parent_evt, struct mgcp_conn_peer *conn_peer);
+void mgcp_conn_delete(struct osmo_fsm_inst *fi);