diff --git a/include/Makefile.am b/include/Makefile.am
index 161bbca..e0c1a2b 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -99,6 +99,7 @@
                        osmocom/gsm/protocol/gsm_04_08_gprs.h \
                        osmocom/gsm/protocol/gsm_04_11.h \
                        osmocom/gsm/protocol/gsm_04_12.h \
+                       osmocom/gsm/protocol/gsm_04_14.h \
                        osmocom/gsm/protocol/gsm_04_80.h \
                        osmocom/gsm/protocol/gsm_08_08.h \
                        osmocom/gsm/protocol/gsm_08_58.h \
diff --git a/include/osmocom/gsm/protocol/gsm_04_14.h b/include/osmocom/gsm/protocol/gsm_04_14.h
new file mode 100644
index 0000000..421b56f
--- /dev/null
+++ b/include/osmocom/gsm/protocol/gsm_04_14.h
@@ -0,0 +1,101 @@
+#pragma once
+
+#include <stdint.h>
+#include <osmocom/core/endian.h>
+#include <osmocom/core/utils.h>
+
+/* According to 3GPP TS 44.014 / GSM TS 04.14 */
+
+#define GSM414_MT_CLOSE_TCH_LOOP_CMD	0x00	/* 8.1 */
+enum gsm414_tch_loop_mode {
+	GSM414_LOOP_A	= 0x00,
+	GSM414_LOOP_B	= 0x01,
+	GSM414_LOOP_C	= 0x02,
+	GSM414_LOOP_D	= 0x04,
+	GSM414_LOOP_E	= 0x08,
+	GSM414_LOOP_F	= 0x0c,
+	GSM414_LOOP_I	= 0x1c,
+};
+
+#define GSM414_MT_CLOSE_TCH_LOOP_ACK	0x01	/* 8.2 */
+#define GSM414_MT_OPEN_LOOP_CMD		0x02	/* 8.3 */
+#define GSM414_OPEN_LOOP_ACK_IE		0x81
+
+#define GSM414_MT_CLOSE_MSLOT_LOOP_CMD	0x20	/* 8.4 */
+struct gsm414_close_mslot_loop_cmd {
+#if OSMO_IS_LITTLE_ENDIAN == 1
+	uint8_t chc:2,
+		loop_mech:3,
+		tn:3;
+#else
+	uint8_t tn:3,
+		loop_mech:3,
+		chc:2;
+#endif
+} __attribute__((packed));
+
+#define GSM414_MT_CLOSE_MSLOT_LOOP_ACK	0x21	/* 8.5 */
+struct gsm414_close_mslot_loop_ack {
+#if OSMO_IS_LITTLE_ENDIAN == 1
+	uint8_t err_ind:1,
+		loop_mech:3,
+		chc:2,
+		spare:2;
+#else
+	uint8_t spare:2,
+		chc:2,
+		loop_mech:3,
+		err_ind:1;
+#endif
+} __attribute__((packed));
+
+#define GSM414_MT_OPEN_MSLOT_LOOP_CMD	0x22	/* 8.6 */
+#define GSM414_MT_OPEN_MSLOT_LOOP_ACK	0x23	/* 8.7 */
+#define GSM414_MT_ACT_EMMI_CMD		0x0c	/* 8.8 */
+#define GSM414_MT_ACT_EMMI_ACK		0x0d	/* 8.9 */
+#define GSM414_MT_DEACT_EMMI_CMD	0x80	/* 8.10 */
+#define GSM414_MT_TEST_INTERFACE	0x84	/* 8.11 */
+
+/* 8.12 Timers (milli-seconds) */
+#define GSM414_TT01_MS	2500
+#define GSM414_TT02_MS	2500
+#define GSM414_TT03_MS	50
+
+#define GSM414_MT_GPRS_TEST_MODE_CMD	0x24	/* 8.13 */
+struct gsm414_gprs_test_mode_cmd {
+#if OSMO_IS_LITTLE_ENDIAN == 1
+	uint16_t d:12,
+		spare:3,
+		l:1;
+	uint8_t m:1,
+		dl_tx_offset:3,
+		_spare:4;
+#else
+	uint16_t l:1,
+		spare:3,
+		d:12;
+	uint8_t _spare:4,
+		dl_tx_offset:3,
+		m:1;
+#endif
+} __attribute__((packed));
+
+
+#define GSM414_MT_EGPRS_ST_RB_LOOP_CMD	0x25	/* 8.14 */
+struct gsm414_egprs_st_sb_loop_cmd {
+#if OSMO_IS_LITTLE_ENDIAN == 1
+	uint8_t _spare:4,
+		dl_tx_offset:3,
+		m:1;
+#else
+	uint8_t m:1,
+		dl_tx_offset:3,
+		_spare:4;
+#endif
+} __attribute__((packed));
+
+#define GSM414_MT_RESET_MS_POS_STORED	0x26	/* 8.15 */
+#define GSM414_MS_POS_TECH_AGPS		0x00
+#define GSM414_MS_POS_TECH_AGNSS	0x01
+
+extern const struct value_string gsm414_msgt_names[];
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index d15174a..08cd5e6 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -23,7 +23,7 @@
 libgsmint_la_SOURCES =  a5.c rxlev_stat.c tlv_parser.c comp128.c comp128v23.c \
 			gsm_utils.c rsl.c gsm48.c gsm48_ie.c gsm0808.c sysinfo.c \
 			gprs_cipher_core.c gprs_rlc.c gsm0480.c abis_nm.c gsm0502.c \
-			gsm0411_utils.c gsm0411_smc.c gsm0411_smr.c \
+			gsm0411_utils.c gsm0411_smc.c gsm0411_smr.c gsm0414.c \
 			lapd_core.c lapdm.c kasumi.c gsm_04_08_gprs.c \
 			auth_core.c auth_comp128v1.c auth_comp128v23.c \
 			auth_milenage.c milenage/aes-encblock.c gea.c \
diff --git a/src/gsm/gsm0414.c b/src/gsm/gsm0414.c
new file mode 100644
index 0000000..84d393d
--- /dev/null
+++ b/src/gsm/gsm0414.c
@@ -0,0 +1,20 @@
+#include <osmocom/gsm/protocol/gsm_04_14.h>
+#include <osmocom/core/utils.h>
+
+const struct value_string gsm414_msgt_names[] = {
+	{ GSM414_MT_CLOSE_TCH_LOOP_CMD,		"CLOSE_TCH_LOOP_CMD" },
+	{ GSM414_MT_CLOSE_TCH_LOOP_ACK,		"CLOSE_TCH_LOOP_ACK" },
+	{ GSM414_MT_OPEN_LOOP_CMD,		"OPEN_LOOP_CMD" },
+	{ GSM414_MT_CLOSE_MSLOT_LOOP_CMD,	"CLOSE_MSLOT_LOOP_CMD" },
+	{ GSM414_MT_CLOSE_MSLOT_LOOP_ACK,	"CLOSE_MSLOT_LOOP_ACK" },
+	{ GSM414_MT_OPEN_MSLOT_LOOP_CMD,	"OPEN_MSLOT_LOOP_CMD" },
+	{ GSM414_MT_OPEN_MSLOT_LOOP_ACK,	"OPEN_MSLOT_LOOP_ACK" },
+	{ GSM414_MT_ACT_EMMI_CMD,		"ACT_EMMI_CMD" },
+	{ GSM414_MT_ACT_EMMI_ACK,		"ACT_EMMI_ACK" },
+	{ GSM414_MT_DEACT_EMMI_CMD,		"DEACT_EMMI_CMD" },
+	{ GSM414_MT_TEST_INTERFACE,		"TEST_INTERFACE" },
+	{ GSM414_MT_GPRS_TEST_MODE_CMD,		"GPRS_TEST_MODE_CMD" },
+	{ GSM414_MT_EGPRS_ST_RB_LOOP_CMD,	"EGPRS_START_RB_LOOP_CMD" },
+	{ GSM414_MT_RESET_MS_POS_STORED,	"RESET_MS_POS_STORED" },
+	{ 0, NULL }
+};
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 8fb9878..9613c4e 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -188,6 +188,8 @@
 gsm411_cp_cause_strs;
 gsm411_rp_cause_strs;
 
+gsm414_msgt_names;
+
 gsm48_att_tlvdef;
 gsm48_cc_msg_name;
 gsm48_rr_msg_name;