diff --git a/include/osmocom/gsm/abis_nm.h b/include/osmocom/gsm/abis_nm.h
index 04bca43..14dbc08 100644
--- a/include/osmocom/gsm/abis_nm.h
+++ b/include/osmocom/gsm/abis_nm.h
@@ -34,6 +34,7 @@
 const char *abis_nm_avail_name(uint8_t avail);
 const char *abis_nm_test_name(uint8_t test);
 extern const struct tlv_definition abis_nm_osmo_att_tlvdef;
+extern const struct tlv_definition abis_nm_att_tlvdef_ipa;
 
 /*! \brief write a human-readable OML header to the debug log
  *  \param[in] ss Logging sub-system
diff --git a/include/osmocom/gsm/protocol/gsm_12_21.h b/include/osmocom/gsm/protocol/gsm_12_21.h
index 3c3a2c9..ed53dc6 100644
--- a/include/osmocom/gsm/protocol/gsm_12_21.h
+++ b/include/osmocom/gsm/protocol/gsm_12_21.h
@@ -615,6 +615,19 @@
 	uint8_t	subslot;	/*!< \brief E1 sub-slot */
 } __attribute__ ((packed));
 
+/*! \brief 3GPP TS 12.21 9.4.53 T200 index */
+enum abis_nm_t200_idx {
+	T200_SDCCH		= 0,
+	T200_FACCH_F		= 1,
+	T200_FACCH_H		= 2,
+	T200_SACCH_TCH_SAPI0	= 3,
+	T200_SACCH_SDCCH	= 4,
+	T200_SDCCH_SAPI3	= 5,
+	T200_SACCH_TCH_SAPI3	= 6
+};
+
+extern const uint8_t abis_nm_t200_ms[];
+
 /*! \brief Siemens BS-11 specific objects in the SienemsHW (0xA5) object class */
 enum abis_bs11_objtype {
 	BS11_OBJ_ALCO		= 0x01,