diff --git a/include/osmocom/Makefile.am b/include/osmocom/Makefile.am
index f9d5e7c..a8574ba 100644
--- a/include/osmocom/Makefile.am
+++ b/include/osmocom/Makefile.am
@@ -1 +1 @@
-SUBDIRS=abis
+SUBDIRS=abis trau
diff --git a/include/osmocom/trau/Makefile.am b/include/osmocom/trau/Makefile.am
new file mode 100644
index 0000000..d796c7c
--- /dev/null
+++ b/include/osmocom/trau/Makefile.am
@@ -0,0 +1,3 @@
+osmotrau_HEADERS = osmo_ortp.h
+
+osmotraudir = $(includedir)/osmocom/trau
diff --git a/include/osmocom/trau/osmo_ortp.h b/include/osmocom/trau/osmo_ortp.h
new file mode 100644
index 0000000..278423b
--- /dev/null
+++ b/include/osmocom/trau/osmo_ortp.h
@@ -0,0 +1,56 @@
+#ifndef _OSMO_ORTP_H
+#define _OSMO_ORTP_H
+
+#include <stdint.h>
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/select.h>
+
+//#include <ortp/ortp.h>
+struct _RtpSession;
+
+
+#define RTP_PT_GSM_FULL 3
+#define RTP_PT_GSM_HALF 96
+#define RTP_PT_GSM_EFR 97
+#define RTP_PT_AMR 98
+
+struct osmo_rtp_socket {
+	/*! \biref list header for global list of sockets */
+	struct llist_head list;
+
+	/*! \brief libortp RTP session pointer */
+	struct _RtpSession *sess;
+	/*! \brief Osmo file descriptor for RTP socket FD */
+	struct osmo_fd rtp_bfd;
+	/*! \brief Osmo file descriptor for RTCP socket FD */
+	struct osmo_fd rtcp_bfd;
+
+	/*! \brief callback for incoming data */
+	void (*rx_cb)(struct osmo_rtp_socket *rs, const uint8_t *payload,
+		      unsigned int payload_len);
+
+	/* Rx related */
+	uint32_t rx_user_ts;
+
+	/* Tx related */
+	uint32_t tx_timestamp;
+
+	void *priv;
+};
+
+void osmo_rtp_init(void *ctx);
+struct osmo_rtp_socket *osmo_rtp_socket_create(void *talloc_ctx);
+int osmo_rtp_socket_bind(struct osmo_rtp_socket *rs, const char *ip, int port);
+int osmo_rtp_socket_connect(struct osmo_rtp_socket *rs, const char *ip, uint16_t port);
+int osmo_rtp_socket_set_pt(struct osmo_rtp_socket *rs, int payload_type);
+int osmo_rtp_socket_free(struct osmo_rtp_socket *rs);
+int osmo_rtp_send_frame(struct osmo_rtp_socket *rs, const uint8_t *payload,
+			unsigned int payload_len, unsigned int duration);
+
+int osmo_rtp_get_bound_ip_port(struct osmo_rtp_socket *rs,
+			       uint32_t *ip, int *port);
+int osmo_rtp_get_bound_addr(struct osmo_rtp_socket *rs,
+			    const char **addr, int *port);
+
+#endif /* _OSMO_ORTP_H */