diff --git a/library/PCUIF_Types.ttcn b/library/PCUIF_Types.ttcn
new file mode 100644
index 0000000..e4a314d
--- /dev/null
+++ b/library/PCUIF_Types.ttcn
@@ -0,0 +1,414 @@
+module PCUIF_Types {
+
+import from General_Types all;
+import from Osmocom_Types all;
+
+/* Osmocom PCU Interface Types, as per osmo-pcu/include/osmocom/pcu/pcuif_proto.h */
+
+const charstring PCU_SOCK_DEFAULT := "/tmp/pcu_bts";
+const uint32_t PCU_IF_VERSION := 8;
+
+type enumerated PCUIF_MsgType {
+	PCU_IF_MSG_DATA_REQ		('00'O),
+	PCU_IF_MSG_DATA_CNF		('01'O),
+	PCU_IF_MSG_DATA_IND		('02'O),
+	PCU_IF_MSG_SUSP_REQ		('03'O),
+	PCU_IF_MSG_RTS_REQ		('10'O),
+	PCU_IF_MSG_DATA_CNF_DT		('11'O),
+	PCU_IF_MSG_RACH_IND		('22'O),
+	PCU_IF_MSG_INFO_IND		('32'O),
+	PCU_IF_MSG_ACT_REQ		('40'O),
+	PCU_IF_MSG_TIME_IND		('52'O),
+	PCU_IF_MSG_PAG_REQ		('60'O),
+	PCU_IF_MSG_TXT_IND		('70'O)
+} with { variant "FIELDLENGTH(8)" };
+
+type enumerated PCUIF_Sapi {
+	PCU_IF_SAPI_UNKNOWN		('00'O),
+	PCU_IF_SAPI_RACH		('01'O),
+	PCU_IF_SAPI_AGCH		('02'O),
+	PCU_IF_SAPI_PCH			('03'O),
+	PCU_IF_SAPI_BCCH		('04'O),
+	PCU_IF_SAPI_PDTCH		('05'O),
+	PCU_IF_SAPI_PRACH		('06'O),
+	PCU_IF_SAPI_PTCCH		('07'O),
+	PCU_IF_SAPI_AGCH_DT		('08'O)
+} with { variant "FIELDLENGTH(8)" };
+
+type record PCUIF_Flags {
+	boolean		bts_active,
+	boolean		sysmo_direct_dsp,
+	BIT14		spare,
+	boolean		cs1,
+	boolean		cs2,
+	boolean		cs3,
+	boolean		cs4,
+	boolean		mcs1,
+	boolean		mcs2,
+	boolean		mcs3,
+	boolean		mcs4,
+	boolean		mcs5,
+	boolean		mcs6,
+	boolean		mcs7,
+	boolean		mcs8,
+	boolean		mcs9,
+	BIT3		spare2
+} with { variant "" };
+
+type enumerated PCUIF_TextType {
+	PCU_VERSION			(0),
+	PCU_OML_ALERT			(1)
+} with { variant "FIELDLENGTH(8)" };
+
+type charstring PCUIF_Text length(128) with { variant "FIELDLENGTH(128)" };
+
+type record PCUIF_txt_ind {
+	PCUIF_TextType	txt_type,
+	PCUIF_Text	text
+} with { variant "" };
+
+type octetstring OCT162 length(162) with { variant "FIELDLENGTH(162)" };
+
+type record PCUIF_data {
+	PCUIF_Sapi	sapi,
+	uint8_t		len,
+	OCT162		data,
+	uint32_t	fn,
+	uint16_t	arfcn,
+	uint8_t		trx_nr,
+	uint8_t		ts_nr,
+	uint8_t		block_nr,
+	int8_t		rssi,
+	uint16_t	ber10k,
+	int16_t		ta_offs_qbits,
+	int16_t		lqual_cb
+} with { variant "" };
+
+type record PCUIF_data_cnf_dt {
+	PCUIF_Sapi	sapi,
+	OCT4		tlli,
+	uint32_t	fn,
+	uint16_t	arfcn,
+	uint8_t		trx_nr,
+	uint8_t		ts_nr,
+	uint8_t		block_nr,
+	int8_t		rssi,
+	uint16_t	ber10k,
+	int16_t		ta_offs_qbits,
+	int16_t		lqual_cb
+} with { variant "" };
+
+type record PCUIF_rts_req {
+	PCUIF_Sapi	sapi,
+	OCT3		spare,
+	uint32_t	fn,
+	uint16_t	arfcn,
+	uint8_t		trx_nr,
+	uint8_t		ts_nr,
+	uint8_t		block_nr
+} with { variant "" };
+
+type record PCUIF_rach_ind {
+	PCUIF_Sapi	sapi,
+	uint16_t	ra,
+	int16_t		qta,
+	uint32_t	fn,
+	uint16_t	arfcn,
+	uint8_t		is_11bit,
+	uint8_t		burst_type
+} with { variant "" };
+
+type record PCUIF_InfoTrx {
+	uint16_t	arfcn,
+	BIT8		pdch_mask,
+	OCT1		spare,
+	OCT8		tsc,
+	uint32_t	hLayer1
+} with { variant "" };
+
+type record PCUIF_info_ind {
+	uint32_t	version,
+	PCUIF_Flags	flags,
+	record length(8) of PCUIF_InfoTrx	trx,
+	uint8_t		bsic,
+
+	uint16_t	mcc,
+	uint16_t	mnc,
+	uint16_t	lac,
+	uint16_t	rac,
+
+	uint16_t	nsei,
+	record length(7) of uint8_t nse_timer,
+	record length(11) of uint8_t cell_timer,
+
+	uint16_t	cell_id,
+	uint16_t	repeat_time,
+	uint8_t		repeat_count,
+	uint16_t	bvci,
+	uint8_t		t3142,
+	uint8_t		t3169,
+	uint8_t		t3191,
+	uint8_t		t3193_10ms,
+	uint8_t		t3195,
+	uint8_t		t3101,
+	uint8_t		t3103,
+	uint8_t		t3105,
+	uint8_t		cv_countdown,
+	uint16_t	dl_tbf_ext,
+	uint16_t	ul_tbf_ext,
+	uint8_t		initial_cs,
+	uint8_t		initial_mcs,
+
+	record length(2) of uint16_t	nsvci,
+	record length(2) of uint16_t	local_pprt,
+	record length(2) of uint16_t	remote_port,
+	record length(2) of uint32_t	remote_ip
+} with { variant "" }
+
+type record PCUIF_act_req {
+	uint8_t		is_activate,
+	uint8_t		trx_nr,
+	uint8_t		ts_nr,
+	OCT1		spare
+} with { variant "" };
+
+type record PCUIF_time_ind {
+	uint32_t	fn
+} with { variant "" };
+
+type record PCUIF_pag_req {
+	PCUIF_Sapi	sapi,
+	uint8_t		chan_needed,
+	OCT9		identity_lv
+} with { variant "" };
+
+type record PCUIF_susp_req {
+	OCT4		tlli,
+	OCT6		ra_id,
+	uint8_t		cause
+} with { variant "" };
+
+
+type union PCUIF_MsgUnion {
+	PCUIF_data		data_req,
+	PCUIF_data		data_cnf,
+	PCUIF_data_cnf_dt	data_cnf_dt,
+	PCUIF_data		data_ind,
+	PCUIF_susp_req		susp_req,
+	PCUIF_rts_req		rts_req,
+	PCUIF_rach_ind		rach_ind,
+	PCUIF_txt_ind		txt_ind,
+	PCUIF_info_ind		info_ind,
+	PCUIF_act_req		act_req,
+	PCUIF_time_ind		time_ind,
+	PCUIF_pag_req		pag_req
+} with { variant "" };
+
+type record PCUIF_Message {
+	PCUIF_MsgType	msg_type,
+	uint8_t		bts_nr,
+	OCT2		spare,
+	PCUIF_MsgUnion	u
+} with { variant (u) "CROSSTAG(
+				data_req, 	msg_type = PCU_IF_MSG_DATA_REQ;
+				data_cnf,	msg_type = PCU_IF_MSG_DATA_CNF;
+				data_cnf_dt,	msg_type = PCU_IF_MSG_DATA_CNF_DT;
+				data_ind,	msg_type = PCU_IF_MSG_DATA_IND;
+				susp_req,	msg_type = PCU_IF_MSG_SUSP_REQ;
+				rts_req,	msg_type = PCU_IF_MSG_RTS_REQ;
+				rach_ind,	msg_type = PCU_IF_MSG_RACH_IND;
+				txt_ind,	msg_type = PCU_IF_MSG_TXT_IND;
+				info_ind,	msg_type = PCU_IF_MSG_INFO_IND;
+				act_req,	msg_type = PCU_IF_MSG_ACT_REQ;
+				time_ind,	msg_type = PCU_IF_MSG_TIME_IND;
+				pag_req,	msg_type = PCU_IF_MSG_PAG_REQ)"
+	 variant "PADDING(1688)"
+};
+
+external function enc_PCUIF_Message(in PCUIF_Message pdu) return octetstring
+	with { extension "prototype(convert) encode(RAW)" };
+external function dec_PCUIF_Message(in octetstring stream) return PCUIF_Message
+	with { extension "prototype(convert) decode(RAW)" };
+
+
+template PCUIF_Message tr_PCUIF_RTS_REQ(template uint8_t bts_nr := ?,
+					template uint8_t trx_nr := ?,
+					template uint8_t ts_nr := ?,
+					template PCUIF_Sapi sapi := ?,
+					template uint32_t fn := ?,
+					template uint8_t block_nr := ?
+					) := {
+	msg_type := PCU_IF_MSG_RTS_REQ,
+	bts_nr := bts_nr,
+	spare := ?,
+	u := {
+		rts_req := {
+			sapi := sapi,
+			spare := ?,
+			fn := fn,
+			arfcn := ?,
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			block_nr := block_nr
+		}
+	}
+}
+
+template (value) PCUIF_Message ts_PCUIF_TXT_IND(uint8_t bts_nr, PCUIF_TextType tt, charstring text) := {
+	msg_type := PCU_IF_MSG_TXT_IND,
+	bts_nr := bts_nr,
+	spare := '0000'O,
+	u := {
+		txt_ind := {
+			txt_type := tt,
+			text := text
+		}
+	}
+}
+
+template (value) PCUIF_Message ts_PCUIF_ACT_REQ(uint8_t bts_nr, uint8_t trx_nr, uint8_t ts_nr) := {
+	msg_type := PCU_IF_MSG_ACT_REQ,
+	bts_nr := bts_nr,
+	spare := '0000'O,
+	u := {
+		act_req := {
+			is_activate := 1,
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			spare := '00'O
+		}
+	}
+}
+
+template (value) PCUIF_Message ts_PCUIF_DEACT_REQ(uint8_t bts_nr, uint8_t trx_nr, uint8_t ts_nr) := {
+	msg_type := PCU_IF_MSG_ACT_REQ,
+	bts_nr := bts_nr,
+	spare := '0000'O,
+	u := {
+		act_req := {
+			is_activate := 0,
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			spare := '00'O
+		}
+	}
+}
+
+template PCUIF_Message tr_PCUIF_DATA_IND(template uint8_t bts_nr := ?,
+					 template uint8_t trx_nr := ?,
+					 template uint8_t ts_nr := ?,
+					 template uint8_t block_nr := ?,
+					 template PCUIF_Sapi sapi := ?,
+					 template OCT162 data := ?) := {
+	msg_type := PCU_IF_MSG_DATA_IND,
+	bts_nr := bts_nr,
+	spare := ?,
+	u := {
+		data_ind := {
+			sapi := sapi,
+			len := ?,
+			data := data,
+			fn := ?,
+			arfcn := ?,
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			block_nr := block_nr,
+			rssi := ?,
+			ber10k := ?,
+			ta_offs_qbits := ?,
+			lqual_cb := ?
+		}
+	}
+}
+
+template (value) PCUIF_Message ts_PCUIF_DATA_REQ(uint8_t bts_nr, uint8_t trx_nr,
+						 uint8_t ts_nr, uint8_t block_nr,
+						 uint32_t fn, PCUIF_Sapi sapi,
+						 octetstring data) := {
+	msg_type := PCU_IF_MSG_DATA_REQ,
+	bts_nr := bts_nr,
+	spare := '0000'O,
+	u := {
+		data_req := {
+			sapi := sapi,
+			len := lengthof(data),
+			data := data,
+			fn := fn,
+			arfcn := 0, /* unused in BTS */
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			block_nr := block_nr,
+			/* measurement parameters below unused on Tx */
+			rssi := 0,
+			ber10k := 0,
+			ta_offs_qbits := 0,
+			lqual_cb := 0
+		}
+	}
+}
+
+template PCUIF_Message tr_PCUIF_DATA_CNF(template uint8_t bts_nr := ?,
+					 template uint8_t trx_nr := ?,
+					 template uint8_t ts_nr := ?,
+					 template PCUIF_Sapi sapi := ?,
+					 template octetstring data := ?) := {
+	msg_type := PCU_IF_MSG_DATA_CNF,
+	bts_nr := bts_nr,
+	spare := ?,
+	u := {
+		data_cnf := {
+			sapi := sapi,
+			len := ?,
+			data := data,
+			fn := ?,
+			arfcn := ?,
+			trx_nr := trx_nr,
+			ts_nr := ts_nr,
+			block_nr := ?,
+			rssi := ?,
+			ber10k := ?,
+			ta_offs_qbits := ?,
+			lqual_cb := ?
+		}
+	}
+}
+
+template PCUIF_Message tr_PCUIF_RACH_IND(template uint8_t bts_nr := ?,
+					 template uint16_t ra := ?,
+					 template uint8_t is_11bit := ?,
+					 template uint8_t burst_type := ?,
+					 template uint32_t fn := ?) := {
+	msg_type := PCU_IF_MSG_RACH_IND,
+	bts_nr := bts_nr,
+	spare := ?,
+	u := {
+		rach_ind := {
+			sapi := PCU_IF_SAPI_RACH,
+			ra := ra,
+			qta := ?,
+			fn := fn,
+			arfcn := ?,
+			is_11bit := is_11bit,
+			burst_type := burst_type
+		}
+	}
+}
+
+template PCUIF_Message tr_PCUIF_PAG_REQ(template uint8_t bts_nr := ?,
+					 template OCT9 id_lv := ?,
+					 template uint8_t chan_needed := ?,
+					 template PCUIF_Sapi sapi := ?) := {
+	msg_type := PCU_IF_MSG_PAG_REQ,
+	bts_nr := bts_nr,
+	spare := ?,
+	u := {
+		pag_req := {
+			sapi := ?,
+			chan_needed := chan_needed,
+			identity_lv := id_lv
+		}
+	}
+}
+
+
+} with { encode "RAW" variant "BYTEORDER(first)" };