From 6254ee454147eab6f6a51792544716472e20073f Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <zecke@selfish.org>
Date: Tue, 11 Jan 2011 15:09:18 +0100
Subject: [PATCH 2/4] ericsson_rbs2409

Add Ericsson RBS2409 dissector
---
 epan/CMakeLists.txt                      |    2 +
 epan/dissectors/Makefile.common          |    2 +
 epan/dissectors/packet-ehdlc.c           |  319 +++++++
 epan/dissectors/packet-gsm_abis_om2000.c | 1439 ++++++++++++++++++++++++++++++
 epan/dissectors/packet-gsm_abis_oml.c    |   21 +
 epan/dissectors/packet-l2tp.c            |    7 +
 6 files changed, 1790 insertions(+), 0 deletions(-)
 create mode 100644 epan/dissectors/packet-ehdlc.c
 create mode 100644 epan/dissectors/packet-gsm_abis_om2000.c

diff --git a/epan/CMakeLists.txt b/epan/CMakeLists.txt
index 0b09335..9217ec0 100644
--- a/epan/CMakeLists.txt
+++ b/epan/CMakeLists.txt
@@ -184,6 +184,8 @@ set(DIRTY_PIDL_DISSECTOR_SRC
 	dissectors/packet-dcerpc-eventlog.c
 	dissectors/packet-dcerpc-lsa.c
 	dissectors/packet-dcerpc-winreg.c
+	dissectors/packet-ehdlc.c
+	dissectors/packet-gsm_abis_om2000.c
 )
 set(ASN1_DISSECTOR_SRC
 	dissectors/packet-acp133.c
diff --git a/epan/dissectors/Makefile.common b/epan/dissectors/Makefile.common
index 7ce83b6..4c7094b 100644
--- a/epan/dissectors/Makefile.common
+++ b/epan/dissectors/Makefile.common
@@ -67,6 +67,8 @@ DIRTY_PIDL_DISSECTOR_SRC = \
 	packet-dcerpc-dnsserver.c 	\
 	packet-dcerpc-eventlog.c \
 	packet-dcerpc-lsa.c \
+	packet-ehdlc.c		\
+	packet-gsm_abis_om2000.c	\
 	packet-dcerpc-winreg.c
 
 #
diff --git a/epan/dissectors/packet-ehdlc.c b/epan/dissectors/packet-ehdlc.c
new file mode 100644
index 0000000..40bb3ab
--- /dev/null
+++ b/epan/dissectors/packet-ehdlc.c
@@ -0,0 +1,319 @@
+/* packet-ehdlc.c
+ * Routines for packet dissection of Ericsson HDLC as used in A-bis over IP
+ * Copyright 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * $Id: packet-ehdlc.c 33767 2010-08-11 11:59:47Z etxrab $
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+
+#include <epan/packet.h>
+#include <epan/ipproto.h>
+#include <epan/xdlc.h>
+
+/* Initialize the protocol and registered fields */
+static int proto_ehdlc = -1;
+
+static int hf_ehdlc_data_len = -1;
+static int hf_ehdlc_protocol = -1;
+static int hf_ehdlc_sapi = -1;
+static int hf_ehdlc_c_r = -1;
+
+static int hf_ehdlc_xid_payload = -1;
+static int hf_ehdlc_control = -1;
+
+static int hf_ehdlc_p = -1;
+static int hf_ehdlc_f = -1;
+static int hf_ehdlc_u_modifier_cmd = -1;
+static int hf_ehdlc_u_modifier_resp = -1;
+static int hf_ehdlc_ftype_s_u = -1;
+
+static int hf_ehdlc_n_r = -1;
+static int hf_ehdlc_n_s = -1;
+static int hf_ehdlc_p_ext = -1;
+static int hf_ehdlc_f_ext = -1;
+static int hf_ehdlc_s_ftype = -1;
+static int hf_ehdlc_ftype_i = -1;
+static int hf_ehdlc_ftype_s_u_ext = -1;
+
+/* Used only for U frames */
+static const xdlc_cf_items ehdlc_cf_items = {
+	NULL,
+	NULL,
+	&hf_ehdlc_p,
+	&hf_ehdlc_f,
+	NULL,
+	&hf_ehdlc_u_modifier_cmd,
+	&hf_ehdlc_u_modifier_resp,
+	NULL,
+	&hf_ehdlc_ftype_s_u
+};
+
+/* Used only for I and S frames */
+static const xdlc_cf_items ehdlc_cf_items_ext = {
+	&hf_ehdlc_n_r,
+	&hf_ehdlc_n_s,
+	&hf_ehdlc_p_ext,
+	&hf_ehdlc_f_ext,
+	&hf_ehdlc_s_ftype,
+	NULL,
+	NULL,
+	&hf_ehdlc_ftype_i,
+	&hf_ehdlc_ftype_s_u_ext,
+};
+
+/* Initialize the subtree pointers */
+static gint ett_ehdlc = -1;
+static gint ett_ehdlc_control = -1;
+
+static const value_string ehdlc_protocol_vals[] = {
+	{ 0x20,		"RSL" },
+	{ 0xa0,		"ACK" },
+	{ 0xc0,		"OML" },
+	{ 0, 		NULL }
+};
+
+enum {
+	SUB_RSL,
+	SUB_OML,
+	SUB_DATA,
+
+	SUB_MAX
+};
+
+static dissector_handle_t sub_handles[SUB_MAX];
+
+/* Code to actually dissect the packets */
+static void
+dissect_ehdlc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	gint remaining;
+	int offset = 4;
+
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "EHDLC");
+	col_clear(pinfo->cinfo, COL_INFO);
+
+	while ((remaining = tvb_reported_length_remaining(tvb, offset)) > 0) {
+		proto_item *ti = NULL;
+		proto_tree *ehdlc_tree = NULL;
+		guint16 len, msg_type;
+		tvbuff_t *next_tvb;
+		guint16 control;
+		gboolean is_response = 0, is_extended = TRUE;
+		gint header_length = 2;	/* Address + Length field */
+
+		msg_type = tvb_get_guint8(tvb, offset);
+		len = tvb_get_guint8(tvb, offset+1);
+#if 0
+		col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
+		                val_to_str(msg_type, ehdlc_protocol_vals,
+		                           "unknown 0x%02x"));
+#endif
+		if (tree) {
+			ti = proto_tree_add_protocol_format(tree, proto_ehdlc,
+					tvb, offset, len,
+					"Ericsson HDLC protocol, type: %s",
+					val_to_str(msg_type, ehdlc_protocol_vals,
+						   "unknown 0x%02x"));
+			ehdlc_tree = proto_item_add_subtree(ti, ett_ehdlc);
+			proto_tree_add_item(ehdlc_tree, hf_ehdlc_protocol,
+					    tvb, offset, 1, FALSE);
+#if 0
+			proto_tree_add_item(ehdlc_tree, hf_ehdlc_sapi,
+					    tvb, offset, 1, FALSE);
+			proto_tree_add_item(ehdlc_tree, hf_ehdlc_c_r,
+					    tvb, offset, 1, FALSE);
+#endif
+			proto_tree_add_item(ehdlc_tree, hf_ehdlc_data_len,
+					    tvb, offset+1, 1, FALSE);
+		}
+
+		control = dissect_xdlc_control(tvb, offset+2, pinfo, ehdlc_tree, hf_ehdlc_control,
+					       ett_ehdlc_control, &ehdlc_cf_items, &ehdlc_cf_items_ext,
+					       NULL, NULL, is_response, is_extended, FALSE);
+		header_length += XDLC_CONTROL_LEN(control, is_extended);
+
+		if (XDLC_IS_INFORMATION(control)) {
+			next_tvb = tvb_new_subset(tvb, offset+header_length,
+						  len-header_length, len);
+
+			switch (msg_type) {
+			case 0x20:
+				/* len == 4 seems to be some kind of ACK */
+				if (len <= 4)
+					break;
+				call_dissector(sub_handles[SUB_RSL], next_tvb, pinfo, tree);
+				break;
+			case 0xbc:
+			case 0xdc:
+			case 0xa0:
+			case 0xc0:
+				/* len == 4 seems to be some kind of ACK */
+				if (len <= 4)
+					break;
+				call_dissector(sub_handles[SUB_OML], next_tvb, pinfo, tree);
+				break;
+			default:
+				call_dissector(sub_handles[SUB_DATA], next_tvb, pinfo, tree);
+				break;
+			}
+		} else if (control == XDLC_U | XDLC_XID) {
+			/* XID is formatted like ISO 8885, typically we see
+ 			 * something like
+			 * 82		format identifier
+			 * 80		group identifier
+			 * 00 09 	length
+			 * 07 01 05 	Window Size Tx
+			 * 09 01 04	Ack Timer (msec)
+			 * 08 01 05	Window Size Rx */
+			proto_tree_add_item(ehdlc_tree, hf_ehdlc_xid_payload,
+					    tvb, offset+header_length,
+					    len-header_length, FALSE);
+		}
+
+		offset += len;
+	}
+}
+
+void proto_register_ehdlc(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_ehdlc_data_len,
+		  { "DataLen", "ehdlc.data_len",
+		    FT_UINT8, BASE_DEC, NULL, 0x0,
+		    "The length of the data (in bytes)", HFILL }
+		},
+		{ &hf_ehdlc_protocol,
+		  { "Protocol", "ehdlc.protocol",
+		    FT_UINT8, BASE_HEX, VALS(ehdlc_protocol_vals), 0x0,
+		    "The HDLC Sub-Protocol", HFILL }
+		},
+		{ &hf_ehdlc_sapi,
+		  { "SAPI", "ehdlc.sapi",
+		    FT_UINT8, BASE_DEC, NULL, 0x1f,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_c_r,
+		  { "C/R", "ehdlc.c_r",
+		    FT_UINT8, BASE_HEX, NULL, 0x20,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_xid_payload,
+		  { "XID Payload", "ehdlc.xid_payload",
+		    FT_BYTES, BASE_NONE, NULL, 0,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_control,
+		  { "Control Field", "ehdlc.control",
+		    FT_UINT16, BASE_HEX, NULL, 0,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_n_r,
+		  { "N(R)", "ehdlc.control.n_r",
+		    FT_UINT16, BASE_DEC, NULL, XDLC_N_R_EXT_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_n_s,
+		  { "N(S)", "ehdlc.control.n_s",
+		    FT_UINT16, BASE_DEC, NULL, XDLC_N_S_EXT_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_p,
+		  { "Poll", "ehdlc.control.p",
+		    FT_BOOLEAN, 8, TFS(&tfs_set_notset), XDLC_P_F,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_p_ext,
+		  { "Poll", "ehdlc.control.p",
+		    FT_BOOLEAN, 16, TFS(&tfs_set_notset), XDLC_P_F_EXT,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_f,
+		  { "Final", "ehdlc.control.f",
+		    FT_BOOLEAN, 8, TFS(&tfs_set_notset), XDLC_P_F,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_f_ext,
+		  { "Final", "ehdlc.control.f",
+		    FT_BOOLEAN, 16, TFS(&tfs_set_notset), XDLC_P_F_EXT,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_s_ftype,
+		  { "Supervisory frame type", "ehdlc.control.s_ftype",
+		    FT_UINT16, BASE_HEX, VALS(stype_vals), XDLC_S_FTYPE_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_u_modifier_cmd,
+		  { "Command", "ehdlc.control.u_modifier_cmd",
+		    FT_UINT8, BASE_HEX, VALS(modifier_vals_cmd), XDLC_U_MODIFIER_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_u_modifier_resp,
+		  { "Response", "ehdlc.control.u_modifier_resp",
+		    FT_UINT8, BASE_HEX, VALS(modifier_vals_resp), XDLC_U_MODIFIER_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_ftype_i,
+		  { "Frame Type", "ehdlc.control.ftype",
+		    FT_UINT16, BASE_HEX, VALS(ftype_vals), XDLC_I_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_ftype_s_u,
+		  { "Frame Type", "ehdlc.control.ftype",
+		    FT_UINT8, BASE_HEX, VALS(ftype_vals), XDLC_S_U_MASK,
+		    NULL, HFILL }
+		},
+		{ &hf_ehdlc_ftype_s_u_ext,
+		  { "Frame Type", "ehdlc.control.ftype",
+		    FT_UINT16, BASE_HEX, VALS(ftype_vals), XDLC_S_U_MASK,
+		    NULL, HFILL }
+		},
+	};
+
+	static gint *ett[] = {
+		&ett_ehdlc,
+		&ett_ehdlc_control,
+	};
+
+	proto_ehdlc =
+	    proto_register_protocol("Ericsson HDLC",
+				    "Ericsson HDLC as used in A-bis over IP", "ehdlc");
+
+	proto_register_field_array(proto_ehdlc, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+
+	register_dissector("ehdlc", dissect_ehdlc, proto_ehdlc);
+}
+
+void proto_reg_handoff_ehdlc(void)
+{
+	dissector_handle_t ehdlc_handle;
+
+	sub_handles[SUB_RSL] = find_dissector("gsm_abis_rsl");
+	sub_handles[SUB_OML] = find_dissector("gsm_abis_oml");
+	sub_handles[SUB_DATA] = find_dissector("data");
+
+	ehdlc_handle = create_dissector_handle(dissect_ehdlc, proto_ehdlc);
+}
diff --git a/epan/dissectors/packet-gsm_abis_om2000.c b/epan/dissectors/packet-gsm_abis_om2000.c
new file mode 100644
index 0000000..bf67aea
--- /dev/null
+++ b/epan/dissectors/packet-gsm_abis_om2000.c
@@ -0,0 +1,1439 @@
+/* packet-abis_om2000.c
+ * Routines for packet dissection of Ericsson A-bis OML (OM 2000)
+ * Copyright 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+
+#include <epan/packet.h>
+#include <epan/emem.h>
+#include <epan/lapd_sapi.h>
+#include <epan/prefs.h>
+
+#include "packet-gsm_abis_oml.h"
+#include "packet-gsm_a_common.h"
+
+#include <stdio.h>
+
+/* initialize the protocol and registered fields */
+static int proto_abis_om2000 = -1;
+
+static int hf_om2k_msg_code = -1;
+static int hf_om2k_mo_if = -1;
+static int hf_om2k_mo_class = -1;
+static int hf_om2k_mo_instance = -1;
+
+static int hf_om2k_aip = -1;
+static int hf_om2k_oip = -1;
+static int hf_om2k_comb = -1;
+static int hf_om2k_ts = -1;
+static int hf_om2k_hsn = -1;
+static int hf_om2k_maio = -1;
+static int hf_om2k_bsic = -1;
+static int hf_om2k_diversity = -1;
+static int hf_om2k_fn_offs = -1;
+static int hf_om2k_ext_range = -1;
+static int hf_om2k_irc = -1;
+static int hf_om2k_bs_pa_mfrms = -1;
+static int hf_om2k_bs_ag_blks_res= -1;
+static int hf_om2k_drx_dev_max = -1;
+static int hf_om2k_cr = -1;
+static int hf_om2k_ipt3 = -1;
+static int hf_om2k_aop = -1;
+static int hf_om2k_t3105 = -1;
+static int hf_om2k_ny1 = -1;
+static int hf_om2k_cbi = -1;
+static int hf_om2k_tsc = -1;
+static int hf_om2k_icm = -1;
+static int hf_om2k_tta = -1;
+static int hf_om2k_icm_cr = -1;
+static int hf_om2k_lsc_fm = -1;
+static int hf_om2k_lsc_lsi = -1;
+static int hf_om2k_lsc_lsa = -1;
+static int hf_om2k_ls_ft = -1;
+static int hf_om2k_cst = -1;
+static int hf_om2k_ea = -1;
+static int hf_om2k_unknown_tag = -1;
+static int hf_om2k_unknown_val = -1;
+static int hf_om2k_nom_pwr = -1;
+static int hf_om2k_fill_mark = -1;
+static int hf_om2k_bcc = -1;
+static int hf_om2k_mo_state = -1;
+static int hf_om2k_la_state = -1;
+static int hf_om2k_tsn_state = -1;
+static int hf_om2k_bts_manuf = -1;
+static int hf_om2k_bts_gen = -1;
+static int hf_om2k_bts_rev = -1;
+static int hf_om2k_bts_var = -1;
+static int hf_om2k_brr = -1;
+static int hf_om2k_bfr = -1;
+static int hf_om2k_hwinfo_sig = -1;
+static int hf_om2k_capa_sig = -1;
+static int hf_om2k_file_rev = -1;
+static int hf_om2k_filerel_ilr = -1;
+static int hf_om2k_filerel_cur = -1;
+static int hf_om2k_filerel_other = -1;
+static int hf_om2k_cal_time = -1;
+static int hf_om2k_list_nr = -1;
+static int hf_om2k_list_nr_end = -1;
+static int hf_om2k_isl = -1;
+static int hf_om2k_isl_icp1 = -1;
+static int hf_om2k_isl_icp2 = -1;
+static int hf_om2k_isl_ci = -1;
+static int hf_om2k_conl = -1;
+static int hf_om2k_conl_nr_cgs = -1;
+static int hf_om2k_conl_nr_cps_cg = -1;
+static int hf_om2k_conl_ccp = -1;
+static int hf_om2k_conl_ci = -1;
+static int hf_om2k_conl_tag = -1;
+static int hf_om2k_conl_tei = -1;
+static int hf_om2k_tf_mode = -1;
+static int hf_om2k_tf_fs_offset = -1;
+
+
+
+/* initialize the subtree pointers */
+static int ett_om2000 = -1;
+static int ett_om2k_mo = -1;
+static int ett_om2k_isl = -1;
+static int ett_om2k_conl = -1;
+
+static proto_tree *top_tree;
+
+static const value_string om2k_msgcode_vals[] = {
+	{ 0x0000, "Abort SP Command" },
+	{ 0x0002, "Abort SP Complete" },
+	{ 0x0004, "Alarm Report ACK" },
+	{ 0x0005, "Alarm Report NACK" },
+	{ 0x0006, "Alarm Report" },
+	{ 0x0008, "Alarm Status Request" },
+	{ 0x000a, "Alarm Status Request Accept" },
+	{ 0x000b, "Alarm Status Request Reject" },
+	{ 0x000c, "Alarm Status Result ACK" },
+	{ 0x000d, "Alarm Status Result NACK" },
+	{ 0x000e, "Alarm Status Result" },
+	{ 0x0010, "Calendar Time Response" },
+	{ 0x0011, "Calendar Time Reject" },
+	{ 0x0012, "Calendar Time Request" },
+	{ 0x0014, "CON Configuration Request" },
+	{ 0x0016, "CON Configuration Request Accept" },
+	{ 0x0017, "CON Configuration Request Reject" },
+	{ 0x0018, "CON Configuration Result ACK" },
+	{ 0x0019, "CON Configuration Result NACK" },
+	{ 0x001a, "CON Configuration Result" },
+	{ 0x001c, "Connect Command" },
+	{ 0x001e, "Connect Complete" },
+	{ 0x001f, "Connect Rejecte" },
+	{ 0x0028, "Disable Request" },
+	{ 0x002a, "Disable Request Accept" },
+	{ 0x002b, "Disable Request Reject" },
+	{ 0x002c, "Disable Result ACK" },
+	{ 0x002d, "Disable Result NACK" },
+	{ 0x002e, "Disable Result" },
+	{ 0x0030, "Disconnect Command" },
+	{ 0x0032, "Disconnect Complete" },
+	{ 0x0033, "Disconnect Reject" },
+	{ 0x0034, "Enable Request" },
+	{ 0x0036, "Enable Request Accept" },
+	{ 0x0037, "Enable Request Reject" },
+	{ 0x0038, "Enable Result ACK" },
+	{ 0x0039, "Enable Result NACK" },
+	{ 0x003a, "Enable Result" },
+	{ 0x003c, "Escape Downlink Normal" },
+	{ 0x003d, "Escape Downlink NACK" },
+	{ 0x003e, "Escape Uplink Normal" },
+	{ 0x003f, "Escape Uplink NACK" },
+	{ 0x0040, "Fault Report ACK" },
+	{ 0x0041, "Fault Report NACK" },
+	{ 0x0042, "Fault Report" },
+	{ 0x0044, "File Package End Command" },
+	{ 0x0046, "File Package End Result" },
+	{ 0x0047, "File Package End Reject" },
+	{ 0x0048, "File Relation Request" },
+	{ 0x004a, "File Relation Response" },
+	{ 0x004b, "File Relation Request Reject" },
+	{ 0x004c, "File Segment Transfer" },
+	{ 0x004e, "File Segment Transfer Complete" },
+	{ 0x004f, "File Segment Transfer Reject" },
+	{ 0x0050, "HW Information Request" },
+	{ 0x0052, "HW Information Request Accept" },
+	{ 0x0053, "HW Information Request Reject" },
+	{ 0x0054, "HW Information Result ACK" },
+	{ 0x0055, "HW Information Result NACK" },
+	{ 0x0056, "HW Information Result" },
+	{ 0x0060, "IS Configuration Request" },
+	{ 0x0062, "IS Configuration Request Accept" },
+	{ 0x0063, "IS Configuration Request Reject" },
+	{ 0x0064, "IS Configuration Result ACK" },
+	{ 0x0065, "IS Configuration Result NACK" },
+	{ 0x0066, "IS Configuration Result" },
+	{ 0x0068, "Load Data End" },
+	{ 0x006a, "Load Data End Result" },
+	{ 0x006b, "Load Data End Reject" },
+	{ 0x006c, "Load Data Init" },
+	{ 0x006e, "Load Data Init Accept" },
+	{ 0x006f, "Load Data Init Reject" },
+	{ 0x0070, "Loop Control Command" },
+	{ 0x0072, "Loop Control Complete" },
+	{ 0x0073, "Loop Control Reject" },
+	{ 0x0074, "Operational Information" },
+	{ 0x0076, "Operational Information Accept" },
+	{ 0x0077, "Operational Information Reject" },
+	{ 0x0078, "Reset Command" },
+	{ 0x007a, "Reset Complete" },
+	{ 0x007b, "Reset Reject" },
+	{ 0x007c, "RX Configuration Request" },
+	{ 0x007e, "RX Configuration Request Accept" },
+	{ 0x007f, "RX Configuration Request Reject" },
+	{ 0x0080, "RX Configuration Result ACK" },
+	{ 0x0081, "RX Configuration Result NACK" },
+	{ 0x0082, "RX Configuration Result" },
+	{ 0x0084, "Start Request" },
+	{ 0x0086, "Start Request Accept" },
+	{ 0x0087, "Start Request Reject" },
+	{ 0x0088, "Start Result ACK" },
+	{ 0x0089, "Start Result NACK" },
+	{ 0x008a, "Start Result" },
+	{ 0x008c, "Status Request" },
+	{ 0x008e, "Status Response" },
+	{ 0x008f, "Status Reject" },
+	{ 0x0094, "Test Request" },
+	{ 0x0096, "Test Request Accept" },
+	{ 0x0097, "Test Request Reject" },
+	{ 0x0098, "Test Result ACK" },
+	{ 0x0099, "Test Result NACK" },
+	{ 0x009a, "Test Result" },
+	{ 0x00a0, "TF Configuration Request" },
+	{ 0x00a2, "TF Configuration Request Accept" },
+	{ 0x00a3, "TF Configuration Request Reject" },
+	{ 0x00a4, "TF Configuration Result ACK" },
+	{ 0x00a5, "TF Configuration Result NACK" },
+	{ 0x00a6, "TF Configuration Result" },
+	{ 0x00a8, "TS Configuration Request" },
+	{ 0x00aa, "TS Configuration Request Accept" },
+	{ 0x00ab, "TS Configuration Request Reject" },
+	{ 0x00ac, "TS Configuration Result ACK" },
+	{ 0x00ad, "TS Configuration Result NACK" },
+	{ 0x00ae, "TS Configuration Result" },
+	{ 0x00b0, "TX Configuration Request" },
+	{ 0x00b2, "TX Configuration Request Accept" },
+	{ 0x00b3, "TX Configuration Request Reject" },
+	{ 0x00b4, "TX Configuration Result ACK" },
+	{ 0x00b5, "TX Configuration Result NACK" },
+	{ 0x00b6, "TX Configuration Result" },
+	{ 0x00bc, "DIP Alarm Report ACK" },
+	{ 0x00bd, "DIP Alarm Report NACK" },
+	{ 0x00be, "DIP Alarm Report" },
+	{ 0x00c0, "DIP Alarm Status Request" },
+	{ 0x00c2, "DIP Alarm Status Response" },
+	{ 0x00c3, "DIP Alarm Status Reject" },
+	{ 0x00c4, "DIP Quality Report I ACK" },
+	{ 0x00c5, "DIP Quality Report I NACK" },
+	{ 0x00c6, "DIP Quality Report I" },
+	{ 0x00c8, "DIP Quality Report II ACK" },
+	{ 0x00c9, "DIP Quality Report II NACK" },
+	{ 0x00ca, "DIP Quality Report II" },
+	{ 0x00dc, "DP Configuration Request" },
+	{ 0x00de, "DP Configuration Request Accept" },
+	{ 0x00df, "DP Configuration Request Reject" },
+	{ 0x00e0, "DP Configuration Result ACK" },
+	{ 0x00e1, "DP Configuration Result NACK" },
+	{ 0x00e2, "DP Configuration Result" },
+	{ 0x00e4, "Capabilities HW Info Report ACK" },
+	{ 0x00e5, "Capabilities HW Info Report NACK" },
+	{ 0x00e6, "Capabilities HW Info Report" },
+	{ 0x00e8, "Capabilities Request" },
+	{ 0x00ea, "Capabilities Request Accept" },
+	{ 0x00eb, "Capabilities Request Reject" },
+	{ 0x00ec, "Capabilities Result ACK" },
+	{ 0x00ed, "Capabilities Result NACK" },
+	{ 0x00ee, "Capabilities Result" },
+	{ 0x00f0, "FM Configuration Request" },
+	{ 0x00f2, "FM Configuration Request Accept" },
+	{ 0x00f3, "FM Configuration Request Reject" },
+	{ 0x00f4, "FM Configuration Result ACK" },
+	{ 0x00f5, "FM Configuration Result NACK" },
+	{ 0x00f6, "FM Configuration Result" },
+	{ 0x00f8, "FM Report Request" },
+	{ 0x00fa, "FM Report Response" },
+	{ 0x00fb, "FM Report Reject" },
+	{ 0x00fc, "FM Start Command" },
+	{ 0x00fe, "FM Start Complete" },
+	{ 0x00ff, "FM Start Reject" },
+	{ 0x0100, "FM Stop Command" },
+	{ 0x0102, "FM Stop Complete" },
+	{ 0x0103, "FM Stop Reject" },
+	{ 0x0104, "Negotiation Request ACK" },
+	{ 0x0105, "Negotiation Request NACK" },
+	{ 0x0106, "Negotiation Request" },
+	{ 0x0108, "BTS Initiated Request ACK" },
+	{ 0x0109, "BTS Initiated Request NACK" },
+	{ 0x010a, "BTS Initiated Request" },
+	{ 0x010c, "Radio Channels Release Command" },
+	{ 0x010e, "Radio Channels Release Complete" },
+	{ 0x010f, "Radio Channels Release Reject" },
+	{ 0x0118, "Feature Control Command" },
+	{ 0x011a, "Feature Control Complete" },
+	{ 0x011b, "Feature Control Reject" },
+
+	{ 0, NULL }
+};
+
+/* TS 12.21 Section 9.4: Attributes */
+static const value_string om2k_attr_vals[] = {
+	{ 0x00, "Accordance indication" },
+	{ 0x01, "Alarm Id" },
+	{ 0x02, "Alarm Data" },
+	{ 0x03, "Alarm Severity" },
+	{ 0x04, "Alarm Status" },
+	{ 0x05, "Alarm Status Type" },
+	{ 0x06, "BCC" },
+	{ 0x07, "BS_AG_BKS_RES" },
+	{ 0x09, "BSIC" },
+	{ 0x0a, "BA_PA_MFRMS" },
+	{ 0x0b, "CBCH Indicator" },
+	{ 0x0c, "CCCH Options" },
+	{ 0x0d, "Calendar Time" },
+	{ 0x0f, "Channel Combination" },
+	{ 0x10, "CON Connection List" },
+	{ 0x11, "Data End Indication" },
+	{ 0x12, "DRX_DEV_MAX" },
+	{ 0x13, "End List Number" },
+	{ 0x14, "External Condition Map Class 1" },
+	{ 0x15, "External Condition Map Class 2" },
+	{ 0x16, "File Relation Indication" },
+	{ 0x17, "File Revision" },
+	{ 0x18, "File Segment Data" },
+	{ 0x19, "File Segment Length" },
+	{ 0x1a, "File Segment Sequence Number" },
+	{ 0x1b, "File Size" },
+	{ 0x1c, "Filling Marker" },
+	{ 0x1d, "FN Offset" },
+	{ 0x1e, "Frequency List" },
+	{ 0x1f, "Frequency Specifier RX" },
+	{ 0x20, "Frequency Specifier TX" },
+	{ 0x21, "HSN" },
+	{ 0x22, "ICM Indicator" },
+	{ 0x23, "Internal Fault Map Class 1A" },
+	{ 0x24, "Internal Fault Map Class 1B" },
+	{ 0x25, "Internal Fault Map Class 2A" },
+	{ 0x26, "Internal Fault Map Class 2A Extension" },
+	{ 0x27, "IS Connection List" },
+	{ 0x28, "List Number" },
+	{ 0x29, "File Package State Indication" },
+	{ 0x2a, "Local Access State" },
+	{ 0x2b, "MAIO" },
+	{ 0x2c, "MO State" },
+	{ 0x2d, "Ny1" },
+	{ 0x2e, "Operational Information" },
+	{ 0x2f, "Power" },
+	{ 0x30, "RU Position Data" },
+	{ 0x31, "Protocol Error" },
+	{ 0x32, "Reason Code" },
+	{ 0x33, "Receiver Diversity" },
+	{ 0x34, "Replacement Unit Map" },
+	{ 0x35, "Result Code" },
+	{ 0x36, "RU Revision Data" },
+	{ 0x38, "T3105" },
+	{ 0x39, "Test Loop Setting" },
+	{ 0x3a, "TF Mode" },
+	{ 0x3b, "TF Compensation Value" },
+	{ 0x3c, "Time Slot Number" },
+	{ 0x3d, "TSC" },
+	{ 0x3e, "RU Logical Id" },
+	{ 0x3f, "RU Serial Number Data" },
+	{ 0x40, "BTS Version" },
+	{ 0x41, "OML IWD Version" },
+	{ 0x42, "RWL IWD Version" },
+	{ 0x43, "OML Function Map 1" },
+	{ 0x44, "OML Function Map 2" },
+	{ 0x45, "RSL Function Map 1" },
+	{ 0x46, "RSL Function Map 2" },
+	{ 0x47, "Extended Range Indicator" },
+	{ 0x48, "Request Indicators" },
+	{ 0x49, "DIP Alarm Condition Map" },
+	{ 0x4a, "ES Incoming" },
+	{ 0x4b, "ES Outgoing" },
+	{ 0x4e, "SES Incoming" },
+	{ 0x4f, "SES Outgoing" },
+	{ 0x50, "Replacement Unit Map Extension" },
+	{ 0x52, "UAS Incoming" },
+	{ 0x53, "UAS Outgoing" },
+	{ 0x58, "DF Incoming" },
+	{ 0x5a, "DF Outgoing" },
+	{ 0x5c, "SF" },
+	{ 0x60, "S Bits Setting" },
+	{ 0x61, "CRC-4 Use Option" },
+	{ 0x62, "T Parameter" },
+	{ 0x63, "N Parameter" },
+	{ 0x64, "N1 Parameter" },
+	{ 0x65, "N3 Parameter" },
+	{ 0x66, "N4 Parameter" },
+	{ 0x67, "P Parameter" },
+	{ 0x68, "Q Parameter" },
+	{ 0x69, "BI_Q1" },
+	{ 0x6a, "BI_Q2" },
+	{ 0x74, "ICM Boundary Parameters" },
+	{ 0x77, "AFT" },
+	{ 0x78, "AFT RAI" },
+	{ 0x79, "Link Supervision Control" },
+	{ 0x7a, "Link Supervision Filtering Time" },
+	{ 0x7b, "Call Supervision Time" },
+	{ 0x7c, "Interval Length UAS Incoming" },
+	{ 0x7d, "Interval Length UAS Outgoing" },
+	{ 0x7e, "ICM Channel Rate" },
+	{ 0x7f, "Attribute Identifier" },
+	{ 0x80, "FM Frequency List" },
+	{ 0x81, "FM Frequency Report" },
+	{ 0x82, "FM Percentile" },
+	{ 0x83, "FM Clear Indication" },
+	{ 0x84, "HW Info Signature" },
+	{ 0x85, "MO Record" },
+	{ 0x86, "TF Synchronisation Source" },
+	{ 0x87, "TTA" },
+	{ 0x88, "End Segment Number" },
+	{ 0x89, "Segment Number" },
+	{ 0x8a, "Capabilities Signature" },
+	{ 0x8c, "File Relation List" },
+	{ 0x90, "Negotiation Record I" },
+	{ 0x91, "Negotiation Record II" },
+	{ 0x92, "Encryption Algorithm" },
+	{ 0x94, "Interference Rejection Combining" },
+	{ 0x95, "Dedication Information" },
+	{ 0x97, "Feature Code" },
+	{ 0x98, "FS Offset" },
+	{ 0x99, "ESB Timeslot" },
+	{ 0x9a, "Master TG Instance" },
+	{ 0x9b, "Master TX Chain Delay" },
+	{ 0x9c, "External Condition Class 2 Extension" },
+	{ 0x9d, "TSs MO State" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_diversity_vals[] = {
+	{ 0x01, "B receiver side" },
+	{ 0x02, "A receiver side" },
+	{ 0x03, "A+B receiver sides" },
+	{ 0x04, "A+B+C+D receiver sides" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_oip_vals[] = {
+	{ 0x00, "Not Operational" },
+	{ 0x01, "Operational" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_aip_vals[] = {
+	{ 0x00, "Data according to request" },
+	{ 0x01, "Data not according to request" },
+	{ 0x02, "Inconsistent MO data" },
+	{ 0x03, "Capability constraint violation" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_comb_vals[] = {
+	{ 0x03, "SDCCH/8 + SACCH/C8" },
+	{ 0x04, "BCCH, non-combined" },
+	{ 0x05, "BCCH, combined (SDCCH/4)" },
+	{ 0x08, "TCH Type, unspecified" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_icmcr_vals[] = {
+	{ 0x00, "ICM as per TCH/F" },
+	{ 0x01, "ICM as per TCH/H(0 and 1)" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_ea_vals[] = {
+	{ 0x00, "A5/1 and A5/2" },
+	{ 0x01, "A5/2 only" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_fill_vals[] = {
+	{ 0x00, "Filling" },
+	{ 0x01, "No filling" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_mo_state_vals[] = {
+	{ 0x00, "RESET" },
+	{ 0x01, "STARTED" },
+	{ 0x02, "ENABLED" },
+	{ 0x03, "DISABLED" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_la_state_vals[] = {
+	{ 0x00, "LOCALLY CONNECTED" },
+	{ 0x01, "LOCALLY DISCONNECTED" },
+	{ 0, NULL }
+};
+
+static const value_string filerel_state_vals[] = {
+	{ 0x00, "Not known in current state (unknown file)" },
+	{ 0x01, "alllowed, already loaded" },
+	{ 0x02, "allowed, not loaded" },
+	{ 0x03, "not allowed" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_mo_class_short_vals[] = {
+	{ 0x01, "TRXC" },
+	{ 0x03, "TS" },
+	{ 0x04, "TF" },
+	{ 0x05, "IS" },
+	{ 0x06, "CON" },
+	{ 0x0a, "CF" },
+	{ 0x0b, "TX" },
+	{ 0x0c, "RX" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_mo_class_vals[] = {
+	{ 0x01, "TRXC (TRX Controller)" },
+	{ 0x03, "TS (Timeslot)" },
+	{ 0x04, "TF (Timing Function)" },
+	{ 0x05, "IS (Interface Switch)" },
+	{ 0x06, "CON (Concentrator)" },
+	{ 0x0a, "CF (Central Function)" },
+	{ 0x0b, "TX (Transmitter)" },
+	{ 0x0c, "RX (Receiver)" },
+	{ 0, NULL }
+};
+
+static const value_string om2k_tf_mode_vals[] = {
+	{ 0x00, "Master" },
+	{ 0x01, "Standalone" },
+	{ 0x02, "Slave" },
+	{ 0xff, "Not defined" },
+	{ 0, NULL }
+};
+
+static gint
+dissect_tss_mo_state(tvbuff_t *tvb, gint offset, packet_info *pinfo,
+		     proto_tree *tree)
+{
+	guint8 tmp;
+	guint i = 0;
+
+	for (i = 0; i < 8; i+= 2) {
+		tmp = tvb_get_guint8(tvb, offset);
+		proto_tree_add_uint_format(tree, hf_om2k_tsn_state, tvb, offset, 1, tmp & 0xf,
+					   "Timslot %u MO State: %s", i,
+					   val_to_str(tmp & 0xf, om2k_mo_state_vals, "unknown (%02d)"));
+		proto_tree_add_uint_format(tree, hf_om2k_tsn_state, tvb, offset, 1, tmp >> 4,
+					   "Timslot %u MO State: %s", i+1,
+					   val_to_str(tmp >> 4, om2k_mo_state_vals, "unknown (%02d)"));
+		offset++;
+	}
+
+	return offset;
+}
+
+
+static gint
+dissect_om2k_time(tvbuff_t *tvb, gint offset, proto_tree *tree)
+{
+	nstime_t tmptime;
+	time_t tval;
+	struct tm _time;
+
+	_time.tm_year = 100 + tvb_get_guint8(tvb, offset++);
+	_time.tm_mon = tvb_get_guint8(tvb, offset++) -1;
+	_time.tm_mday = tvb_get_guint8(tvb, offset++);
+	_time.tm_hour = tvb_get_guint8(tvb, offset++);
+	_time.tm_min = tvb_get_guint8(tvb, offset++);
+	_time.tm_sec = tvb_get_guint8(tvb, offset++);
+	_time.tm_isdst = -1;
+
+	tval = mktime(&_time);
+	tmptime.secs = tval;
+	tmptime.nsecs = 0;
+
+	proto_tree_add_time(tree, hf_om2k_cal_time, tvb, offset, 6,
+			    &tmptime);
+	return 6;
+}
+
+static gint
+dissect_om2k_attr_unkn(tvbuff_t *tvb, gint offset, gint len, gint iei, proto_tree *tree)
+{
+	proto_tree_add_bytes_format(tree, hf_om2k_unknown_val, tvb,
+				    offset, len, tvb_get_ptr(tvb, offset, len),
+				    "%s: %s",
+				    val_to_str(iei, om2k_attr_vals, "0x%02x"),
+				    tvb_bytes_to_str(tvb, offset, len));
+	return len;
+}
+
+static gint
+dissect_om2k_is_list(tvbuff_t *tvb, gint base_offset, proto_tree *tree)
+{
+	gint offset = base_offset;
+	proto_item *ti;
+	proto_tree *isl_tree;
+	guint8 len = tvb_get_guint8(tvb, offset++);
+
+	ti = proto_tree_add_item(tree, hf_om2k_isl, tvb, offset, len, FALSE);
+	isl_tree = proto_item_add_subtree(ti, ett_om2k_isl);
+
+	while (offset < base_offset + len) {
+		proto_tree_add_item(isl_tree, hf_om2k_isl_icp1, tvb,
+				    offset, 2, FALSE);
+		offset += 2;
+		proto_tree_add_item(isl_tree, hf_om2k_isl_icp2, tvb,
+				    offset, 2, FALSE);
+		offset += 2;
+		proto_tree_add_item(isl_tree, hf_om2k_isl_ci, tvb,
+				    offset++, 1, FALSE);
+	}
+	return offset - base_offset;
+}
+
+static gint
+dissect_om2k_con_list(tvbuff_t *tvb, gint base_offset, proto_tree *tree)
+{
+	gint offset = base_offset;
+	proto_item *ti;
+	proto_tree *conl_tree;
+	guint8 len = tvb_get_guint8(tvb, offset++);
+
+	ti = proto_tree_add_item(tree, hf_om2k_conl, tvb, offset, len, FALSE);
+	conl_tree = proto_item_add_subtree(ti, ett_om2k_conl);
+
+	proto_tree_add_item(conl_tree, hf_om2k_conl_nr_cgs, tvb,
+			    offset++, 1, FALSE);
+
+	while (offset < base_offset + len) {
+		guint8 nr_cps_cg = tvb_get_guint8(tvb, offset);
+		proto_tree_add_item(conl_tree, hf_om2k_conl_nr_cps_cg, tvb,
+				    offset++, 1, FALSE);
+		while (nr_cps_cg--) {
+			proto_tree_add_item(conl_tree, hf_om2k_conl_ccp, tvb,
+				    offset, 2, FALSE);
+			offset += 2;
+			proto_tree_add_item(conl_tree, hf_om2k_conl_ci, tvb,
+				    offset++, 1, FALSE);
+			proto_tree_add_item(conl_tree, hf_om2k_conl_tag, tvb,
+				    offset++, 1, FALSE);
+			proto_tree_add_item(conl_tree, hf_om2k_conl_tei, tvb,
+				    offset++, 1, FALSE);
+		}
+	}
+	return offset - base_offset;
+}
+
+
+static gint
+dissect_om2k_attrs(tvbuff_t *tvb, gint base_offs, packet_info *pinfo,
+		  proto_tree *tree)
+{
+	int offset = base_offs;
+
+	while (tvb_reported_length_remaining(tvb, offset) != 0) {
+		guint8 iei = tvb_get_guint8(tvb, offset++);
+		guint8 len, tmp;
+		switch (iei) {
+		case 0x00: /* Accordance Information */
+			proto_tree_add_item(tree, hf_om2k_aip, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x06: /* BCC */
+			proto_tree_add_item(tree, hf_om2k_bcc, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x07: /* BS_AG_BLKS_RES */
+			proto_tree_add_item(tree, hf_om2k_bs_ag_blks_res, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x09: /* BSIC */
+			proto_tree_add_item(tree, hf_om2k_bsic, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x0a: /* BS_PA_MFRMS */
+			proto_tree_add_item(tree, hf_om2k_bs_pa_mfrms, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x0b: /* CBCH indicator */
+			proto_tree_add_item(tree, hf_om2k_cbi, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x0c: /* CCCH Options */
+			tmp = tvb_get_guint8(tvb, offset);
+			proto_tree_add_item(tree, hf_om2k_cr, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_item(tree, hf_om2k_ipt3, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_uint(tree, hf_om2k_aop, tvb,
+					    offset, 1, (tmp & 0x3f) >> 2);
+			offset++;
+			break;
+		case 0x0d: /* Calendar Time */
+			offset += dissect_om2k_time(tvb, offset, tree);
+			break;
+		case 0x0f: /* Combination */
+			proto_tree_add_item(tree, hf_om2k_comb, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x10: /* CON Connection List */
+			offset += dissect_om2k_con_list(tvb, offset, tree);
+			break;
+		case 0x12: /* DRX_DEV_MAX */
+			proto_tree_add_item(tree, hf_om2k_drx_dev_max, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x13: /* End List Number */
+			proto_tree_add_item(tree, hf_om2k_list_nr_end, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x14: /* External Condition Map Class 1 */
+			/* FIXME */
+		case 0x15: /* External Condition Map Class 2 */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 2, iei, tree);
+			break;
+		case 0x16: /* File Relation Indication */
+			proto_tree_add_item(tree, hf_om2k_filerel_ilr, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_item(tree, hf_om2k_filerel_cur, tvb,
+					    offset, 1, FALSE);
+			offset++;
+			proto_tree_add_item(tree, hf_om2k_filerel_other, tvb,
+					    offset, 1, FALSE);
+			offset++;
+			break;
+		case 0x17: /* File Revision */
+			proto_tree_add_item(tree, hf_om2k_file_rev, tvb,
+					    offset, 8, FALSE);
+			offset += 8;
+			break;
+		case 0x1c: /* Filling Marker */
+			proto_tree_add_item(tree, hf_om2k_fill_mark, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x1d: /* FN Offset */
+			proto_tree_add_item(tree, hf_om2k_fn_offs, tvb,
+					    offset, 2, FALSE);
+			offset += 2;
+			break;
+		case 0x1e: /* Frequency List */
+			len = tvb_get_guint8(tvb, offset++);
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, len, iei, tree);
+			break;
+		case 0x1f: /* Frequency Specifier Rx */
+			/* FIXME */
+		case 0x20: /* Frequency Specifier Rx */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 2, iei, tree);
+			break;
+		case 0x21: /* HSN */
+			proto_tree_add_item(tree, hf_om2k_hsn, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x22: /* ICM */
+			proto_tree_add_item(tree, hf_om2k_icm, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x23: /* Internal Fault Map Class 1A */
+			/* FIXME */
+		case 0x24: /* Internal Fault Map Class 1B */
+			/* FIXME */
+		case 0x25: /* Internal Fault Map Class 2A */
+			/* FIXME */
+		case 0x26: /* Internal Fault Map Class 2A Ext */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 6, iei, tree);
+			break;
+		case 0x27: /* IS Connection List */
+			offset += dissect_om2k_is_list(tvb, offset, tree);
+			break;
+		case 0x28: /* List Number */
+			proto_tree_add_item(tree, hf_om2k_list_nr, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2a: /* Local Access State */
+			proto_tree_add_item(tree, hf_om2k_la_state, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2b: /* MAIO */
+			proto_tree_add_item(tree, hf_om2k_maio, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2c: /* MO State */
+			proto_tree_add_item(tree, hf_om2k_mo_state, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2d: /* Ny1 */
+			proto_tree_add_item(tree, hf_om2k_ny1, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2e: /* Operational Information */
+			proto_tree_add_item(tree, hf_om2k_oip, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x2f: /* Nominal Power */
+			proto_tree_add_item(tree, hf_om2k_nom_pwr, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x33: /* Receiver Diversity */
+			proto_tree_add_item(tree, hf_om2k_diversity, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x34: /* Replacement Unit Map */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 6, iei, tree);
+			break;
+		case 0x38: /* T3105 */
+			proto_tree_add_item(tree, hf_om2k_t3105, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x3a: /* TF Mode */
+			proto_tree_add_item(tree, hf_om2k_tf_mode, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x3c: /* TS Number */
+			proto_tree_add_item(tree, hf_om2k_ts, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x3d: /* TSC */
+			proto_tree_add_item(tree, hf_om2k_tsc, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x40: /* BTS Version */
+			proto_tree_add_item(tree, hf_om2k_bts_manuf, tvb,
+					    offset, 3, FALSE);
+			offset += 3;
+			proto_tree_add_item(tree, hf_om2k_bts_gen, tvb,
+					    offset, 3, FALSE);
+			offset += 3;
+			proto_tree_add_item(tree, hf_om2k_bts_rev, tvb,
+					    offset, 3, FALSE);
+			offset += 3;
+			proto_tree_add_item(tree, hf_om2k_bts_var, tvb,
+					    offset, 3, FALSE);
+			offset += 3;
+			break;
+		case 0x43: /* OML Function Map 1 */
+		case 0x44: /* OML Function Map 2 */
+		case 0x45: /* RSL Function Map 1 */
+		case 0x46: /* RSL Function Map 2 */
+			len = tvb_get_guint8(tvb, offset++);
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, len, iei, tree);
+			break;
+		case 0x47: /* Ext Range */
+			proto_tree_add_item(tree, hf_om2k_ext_range, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x48: /* Request Indicators */
+			proto_tree_add_item(tree, hf_om2k_brr, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_item(tree, hf_om2k_bfr, tvb,
+					    offset, 1, FALSE);
+			offset++;
+			break;
+		case 0x50: /* Replacement Unit Map Extension */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 6, iei, tree);
+			break;
+		case 0x74: /* ICM Boundary */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 5, iei, tree);
+			break;
+		case 0x79: /* Link Supervision Control */
+			proto_tree_add_item(tree, hf_om2k_lsc_fm, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_item(tree, hf_om2k_lsc_lsi, tvb,
+					    offset, 1, FALSE);
+			proto_tree_add_item(tree, hf_om2k_lsc_lsa, tvb,
+					    offset, 1, FALSE);
+			offset++;
+			break;
+		case 0x7a: /* Link Supervision Control */
+			proto_tree_add_item(tree, hf_om2k_ls_ft, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x7b: /* Call Supervision Time */
+			proto_tree_add_item(tree, hf_om2k_cst, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x7e: /* ICM Channel Rate */
+			proto_tree_add_item(tree, hf_om2k_icm_cr, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x84: /* HW Info Signature */
+			proto_tree_add_item(tree, hf_om2k_hwinfo_sig, tvb,
+					    offset, 2, FALSE);
+			offset += 2;
+			break;
+		case 0x87: /* TTA */
+			proto_tree_add_item(tree, hf_om2k_tta, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x8a: /* Capabilities Signature */
+			proto_tree_add_item(tree, hf_om2k_capa_sig, tvb,
+					    offset, 2, FALSE);
+			offset += 2;
+			break;
+		case 0x90: /* Negotiation Record I */
+		case 0x91: /* Negotiation Record II */
+			len = tvb_get_guint8(tvb, offset++);
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, len, iei, tree);
+			break;
+		case 0x92: /* Encryption Algorithm */
+			proto_tree_add_item(tree, hf_om2k_ea, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x94: /* Interference Rejection Combining */
+			proto_tree_add_item(tree, hf_om2k_irc, tvb,
+					    offset++, 1, FALSE);
+			break;
+		case 0x95: /* Dedication information */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 3, iei, tree);
+			break;
+		case 0x98: /* FS Offset */
+			proto_tree_add_item(tree, hf_om2k_tf_fs_offset, tvb,
+					    offset, 5, FALSE);
+			offset += 5;
+			break;
+		case 0x9c: /* External Condition Class 2 Extension */
+			/* FIXME */
+			offset += dissect_om2k_attr_unkn(tvb, offset, 4, iei, tree);
+			break;
+		case 0x9d: /* TSs MO State */
+			dissect_tss_mo_state(tvb, offset, pinfo, tree);
+			offset += 4;
+			break;
+		case 0x9e:
+		case 0x9f:
+		default:
+			tmp = tvb_get_guint8(tvb, offset);
+			proto_tree_add_uint_format(tree, hf_om2k_unknown_tag, tvb,
+					    offset-1, 1, tmp, "Tag %s: 0x%02x",
+					    val_to_str(iei, om2k_attr_vals, "0x%02x"), tmp);
+			offset++;
+			break;
+		}
+	}
+
+	return offset;
+}
+
+static guint
+dissect_om2k_mo(tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree)
+{
+	proto_item *ti;
+	proto_tree *mo_tree;
+	guint8 class = tvb_get_guint8(tvb, offset);
+	guint8 inst = tvb_get_guint8(tvb, offset+3);
+
+	ti = proto_tree_add_item(tree, hf_om2k_mo_if, tvb, offset,
+				 4, FALSE);
+	mo_tree = proto_item_add_subtree(ti, ett_om2k_mo);
+	proto_tree_add_item(mo_tree, hf_om2k_mo_class, tvb, offset,
+				    1, FALSE);
+	proto_tree_add_item(mo_tree, hf_om2k_mo_instance, tvb, offset+3,
+				    1, FALSE);
+	proto_item_append_text(ti, ", Class: %s, Instance: %u",
+				val_to_str(class, om2k_mo_class_vals, "0x%02x"),
+				inst);
+	col_append_fstr(pinfo->cinfo, COL_INFO, ", (%-4s %u)",
+				val_to_str(class, &om2k_mo_class_short_vals,
+					   "0x%02x"), inst);
+	return 4;
+}
+
+static void
+dissect_abis_om2000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	proto_item *ti;
+	proto_tree *om2k_tree;
+
+	int offset = 0;
+
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "OM2000");
+
+	top_tree = tree;
+	if (tree) {
+		guint16 msg_code = tvb_get_ntohs(tvb, offset);
+		guint8 tmp;
+
+		ti = proto_tree_add_item(tree, proto_abis_om2000,
+					 tvb, 0, -1, FALSE);
+		om2k_tree = proto_item_add_subtree(ti, ett_om2000);
+
+		proto_tree_add_item(om2k_tree, hf_om2k_msg_code, tvb, offset,
+				    2, FALSE);
+		offset += 2;
+
+		offset += dissect_om2k_mo(tvb, offset, pinfo, om2k_tree);
+
+		col_append_fstr(pinfo->cinfo, COL_INFO, " %s ",
+				val_to_str(msg_code, &om2k_msgcode_vals,
+					   "unknown 0x%04x"));
+		proto_item_append_text(ti, " %s ",
+				val_to_str(msg_code, &om2k_msgcode_vals,
+					   "unknown 0x%04x"));
+
+		switch (msg_code) {
+		case 0x74: /* Operational Info */
+			tmp = tvb_get_guint8(tvb, offset+1);
+			proto_item_append_text(ti, ": %s",
+				    val_to_str(tmp, om2k_oip_vals,
+						"unknown 0x%02x"));
+			break;
+		case 0x1A: /* CON Configuration Result */
+		case 0x66: /* IS Configuration Result */
+		case 0x82: /* RX Configuration Result */
+		case 0xA6: /* TF Configuration Result */
+		case 0xAE: /* TS Configuration Result */
+		case 0xB6: /* TX Configuration Result */
+		case 0xE2: /* DP Configuration Result */
+		case 0xF6: /* DP Configuration Result */
+			tmp = tvb_get_guint8(tvb, offset+1);
+			proto_item_append_text(ti, ": %s",
+				    val_to_str(tmp, om2k_aip_vals,
+						"unknown 0x%02x"));
+			break;
+		default:
+			break;
+		}
+		dissect_om2k_attrs(tvb, offset, pinfo, om2k_tree);
+	}
+}
+
+void
+proto_reg_handoff_abis_om2000(void);
+
+void
+proto_register_abis_om2000(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_om2k_msg_code,
+			{ "Message Code", "om2000.msg_code",
+			  FT_UINT16, BASE_HEX, VALS(om2k_msgcode_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_mo_if,
+			{ "MO Interface", "om2000.mo_if",
+			  FT_BYTES, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_mo_class,
+			{ "MO IF Class", "om2000.mo_if.class",
+			  FT_UINT8, BASE_HEX, VALS(om2k_mo_class_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_mo_instance,
+			{ "MO IF Instance", "om2000.mo_if.instance",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_oip,
+			{ "OIP (Operational Info)", "om2000.oip",
+			  FT_UINT8, BASE_HEX, VALS(om2k_oip_vals), 0,
+			  "Operational Information Parameter", HFILL }
+		},
+		{ &hf_om2k_aip,
+			{ "AIP (Accordance Info)", "om2000.aip",
+			  FT_UINT8, BASE_HEX, VALS(om2k_aip_vals), 0,
+			  "Accordance Information Parameter", HFILL }
+		},
+		{ &hf_om2k_comb,
+			{ "Channel Combination", "om2000.chan_comb",
+			  FT_UINT8, BASE_DEC, VALS(om2k_comb_vals), 0,
+			  "Logical Channel Combination", HFILL }
+		},
+		{ &hf_om2k_ts,
+			{ "Timeslot Number", "om2000.ts",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_hsn,
+			{ "HSN", "om2000.hsn",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  "Hopping Sequence Number", HFILL }
+		},
+		{ &hf_om2k_maio,
+			{ "MAIO", "om2000.maio",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  "Mobile Allication Index Offset", HFILL }
+		},
+		{ &hf_om2k_bsic,
+			{ "BSIC", "om2000.bsic",
+			  FT_UINT8, BASE_HEX, NULL, 0,
+			  "Base Station Identity Code", HFILL }
+		},
+		{ &hf_om2k_diversity,
+			{ "Receiver Diversity", "om2000.diversity",
+			  FT_UINT8, BASE_HEX, VALS(om2k_diversity_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_fn_offs,
+			{ "FN Offset", "om2000.fn_offset",
+			  FT_UINT16, BASE_DEC, NULL, 0,
+			  "GSM Frame Number Offset", HFILL }
+		},
+		{ &hf_om2k_ext_range,
+			{ "Extended Range", "om2000.ext_range",
+			  FT_BOOLEAN, 1, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_irc,
+			{ "Interference Rejection Combining", "om2000.irc",
+			  FT_BOOLEAN, 1, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bs_pa_mfrms,
+			{ "BS_PA_MFRMS", "om2000.bs_pa_mfrms",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bs_ag_blks_res,
+			{ "BS_AG_BLKS_RES", "om2000.bs_ag_blks_res",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_drx_dev_max,
+			{ "DRX_DEV_MAX", "om2000.drx_dev_max",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_cr,
+			{ "CCCH Repeat", "om2000.ccch_repeat",
+			  FT_BOOLEAN, 1, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_ipt3,
+			{ "Inhibit Paging Request Type 3", "om2000.ipt3",
+			  FT_BOOLEAN, 2, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_aop,
+			{ "Age Of Paging", "om2000.aop",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_t3105,
+			{ "T3105 (in 10ms)", "om2000.t3105",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_ny1,
+			{ "Ny1", "om2000.ny1",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_cbi,
+			{ "CBCH Indicator", "om2000.ny1",
+			  FT_BOOLEAN, 1, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_tsc,
+			{ "Training Sequence Code", "om2000.tsc",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_icm,
+			{ "Idle Channel Measurement", "om2000.icm",
+			  FT_BOOLEAN, 1, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_tta,
+			{ "Timer for Time Alignment", "om2000.tta",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_icm_cr,
+			{ "ICM Channel Rate", "om2000.icm_cr",
+			  FT_BOOLEAN, 1, VALS(om2k_icmcr_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_lsc_fm,
+			{ "LSC Dummy Frequency Measurement", "om2000.lsc.fm",
+			  FT_BOOLEAN, 0x80, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_lsc_lsi,
+			{ "LSC Idle Channels", "om2000.ls.lsi",
+			  FT_BOOLEAN, 0x01, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_lsc_lsa,
+			{ "LSC Active Channels", "om2000.ls.lsa",
+			  FT_BOOLEAN, 0x02, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_ls_ft,
+			{ "Link Supervision Filtering Time (100ms)", "om2000.ls_ft",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_cst,
+			{ "Call Supervision Time (480ms)", "om2000.cst",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_ea,
+			{ "Encryption Algorithm", "om2000.ea",
+			  FT_UINT8, BASE_DEC, VALS(om2k_ea_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_nom_pwr,
+			{ "Nominal Power (dBm)", "om2000.pwr",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_fill_mark,
+			{ "Filling Marker", "om2000.filling",
+			  FT_BOOLEAN, 0x01, VALS(om2k_fill_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bcc,
+			{ "BCC", "om2000.bcc",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  "Base Station Color Code", HFILL }
+		},
+		{ &hf_om2k_mo_state,
+			{ "MO State", "om2000.mo_state",
+			  FT_UINT8, BASE_DEC, VALS(om2k_mo_state_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_la_state,
+			{ "Local Access State", "om2000.la_state",
+			  FT_UINT8, BASE_DEC, VALS(om2k_la_state_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_tsn_state,
+			{ "Time Slot N MO State", "om2000.tsn_mo_state",
+			  FT_UINT8, BASE_DEC, VALS(om2k_mo_state_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bts_manuf,
+			{ "BTS Manufacturer ID", "om2000.bts_ver.manuf",
+			  FT_STRING, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bts_gen,
+			{ "BTS Generation", "om2000.bts_ver.gen",
+			  FT_STRING, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bts_rev,
+			{ "BTS Revision", "om2000.bts_ver.rev",
+			  FT_STRING, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bts_var,
+			{ "BTS Variant", "om2000.bts_ver.variant",
+			  FT_STRING, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_brr,
+			{ "BTS Requested Restart", "om2000.brr",
+			  FT_BOOLEAN, 0x01, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_bfr,
+			{ "BTS Requested File Relation", "om2000.bfr",
+			  FT_BOOLEAN, 0x01, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_hwinfo_sig,
+			{ "HW Info Signature", "om2000.hwinfo_sig",
+			  FT_UINT16, BASE_HEX, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_capa_sig,
+			{ "Capabilities Signature", "om2000.capa_sig",
+			  FT_UINT16, BASE_HEX, NULL, 0,
+			  NULL, HFILL }
+		},
+
+		{ &hf_om2k_unknown_tag,
+			{ "Unknown Tag", "om2000.unknown.tag",
+			  FT_UINT8, BASE_HEX, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_unknown_val,
+			{ "Unknown Value", "om2000.unknown.val",
+			  FT_BYTES, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+
+		{ &hf_om2k_file_rev,
+			{ "File Revision", "om2000.file_rev",
+			  FT_STRING, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_filerel_ilr,
+			{ "Immediate Load Requested", "om2000.filerel.ilr",
+			  FT_BOOLEAN, 0x08, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_filerel_cur,
+			{ "Current State", "om2000.filerel.cur",
+			  FT_UINT8, BASE_HEX, VALS(filerel_state_vals), 0x07,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_filerel_other,
+			{ "Other State", "om2000.filerel.other",
+			  FT_UINT8, BASE_HEX, VALS(filerel_state_vals), 0x07,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_cal_time,
+			{ "Calendar Time", "om2000.cal_time",
+			  FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_list_nr,
+			{ "List Number", "om2000.list_nr",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_list_nr_end,
+			{ "End List Number", "om2000.list_nr_end",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_isl,
+			{ "IS Connection List", "om2000.is_list",
+			  FT_BYTES, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_isl_icp1,
+			{ "ICP1", "om2000.is_list.icp1",
+			  FT_UINT16, BASE_DEC, NULL, 0x7ff,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_isl_icp2,
+			{ "ICP2", "om2000.is_list.icp2",
+			  FT_UINT16, BASE_DEC, NULL, 0x7ff,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_isl_ci,
+			{ "Contiguity Index", "om2000.is_list.ci",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_conl,
+			{ "Connection List", "om2000.con_list",
+			  FT_BYTES, BASE_NONE, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_conl_nr_cgs,
+			{ "Number of CGs", "om2000.con_list.nr_cgs",
+			  FT_UINT8, BASE_DEC, NULL, 0x1f,
+			  "Number of Concentration Groups in the DE", HFILL }
+		},
+		{ &hf_om2k_conl_nr_cps_cg,
+			{ "Number of CPS in CG", "om2000.con_list.nr_cps_cg",
+			  FT_UINT8, BASE_DEC, NULL, 0x1f,
+			  "Number of CPS in Concentration Group", HFILL }
+		},
+		{ &hf_om2k_conl_ccp,
+			{ "CON Connection Point", "om2000.con_list.cpp",
+			  FT_UINT16, BASE_DEC, NULL, 0x3ff,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_conl_ci,
+			{ "Contiguity Index", "om2000.con_list.ci",
+			  FT_UINT8, BASE_DEC, NULL, 0x7,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_conl_tag,
+			{ "Tag", "om2000.con_list.tag",
+			  FT_UINT8, BASE_DEC, NULL, 0x1f,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_conl_tei,
+			{ "TEI", "om2000.con_list.tei",
+			  FT_UINT8, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_tf_mode,
+			{ "TF Mode", "om2000.tf_mode",
+			  FT_UINT8, BASE_HEX, VALS(om2k_tf_mode_vals), 0,
+			  NULL, HFILL }
+		},
+		{ &hf_om2k_tf_fs_offset,
+			{ "TF FS Offset", "om2000.tf_fs_offset",
+			  FT_UINT64, BASE_DEC, NULL, 0,
+			  NULL, HFILL }
+		},
+	};
+	static gint *ett[] = {
+		&ett_om2000,
+		&ett_om2k_mo,
+		&ett_om2k_isl,
+		&ett_om2k_conl,
+	};
+
+	module_t *oml_module;
+
+	proto_abis_om2000 = proto_register_protocol("Ericsson A-bis OML",
+						    "Ericsson OML",
+						    "gsm_abis_om2000");
+
+	proto_register_field_array(proto_abis_om2000, hf, array_length(hf));
+
+	proto_register_subtree_array(ett, array_length(ett));
+
+	register_dissector("gsm_abis_om2000", dissect_abis_om2000,
+			   proto_abis_om2000);
+#if 0
+	oml_module = prefs_register_protocol(proto_abis_oml, proto_reg_handoff_abis_oml);
+	prefs_register_bool_preference(oml_module, "use_ipaccess_oml",
+		    "Use nanoBTS definitions",
+		    "Use ipaccess nanoBTS specific definitions for OML",
+		    &global_oml_use_nano_bts);
+#endif
+}
+
+/* This function is called once at startup and every time the user hits
+ * 'apply' in the preferences dialogue */
+void
+proto_reg_handoff_abis_om2000(void)
+{
+	static gboolean initialized = FALSE;
+
+	if (!initialized) {
+		dissector_handle_t abis_om2k_handle;
+
+		abis_om2k_handle = create_dissector_handle(dissect_abis_om2000,
+							   proto_abis_om2000);
+		//dissector_add("lapd.gsm.sapi", LAPD_GSM_SAPI_OM_PROC, abis_oml_handle);
+	} else {
+		/* preferences have been changed */
+	}
+}
diff --git a/epan/dissectors/packet-gsm_abis_oml.c b/epan/dissectors/packet-gsm_abis_oml.c
index f0b69e7..46a9fad 100644
--- a/epan/dissectors/packet-gsm_abis_oml.c
+++ b/epan/dissectors/packet-gsm_abis_oml.c
@@ -119,9 +119,12 @@ static int ett_oml_fom_att = -1;
 
 /* Decode things as nanoBTS traces */
 static gboolean global_oml_use_nano_bts = TRUE;
+static gboolean global_oml_use_ericsson = TRUE;
 
 static proto_tree *top_tree;
 
+static dissector_handle_t sub_om2000;
+
 /* TS 12.21 Chapter 8.1 / TS 08.59 */
 static const value_string oml_msg_disc_vals[] = {
 	{ ABIS_OM_MDISC_FOM,	"Formatted O&M" },
@@ -1196,6 +1199,7 @@ dissect_abis_oml(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 	top_tree = tree;
 	if (tree) {
 		u_int8_t msg_disc = tvb_get_guint8(tvb, offset);
+		u_int8_t len = tvb_get_guint8(tvb, offset+3);
 
 		ti = proto_tree_add_item(tree, proto_abis_oml, tvb, 0, -1, FALSE);
 		oml_tree = proto_item_add_subtree(ti, ett_oml);
@@ -1209,6 +1213,14 @@ dissect_abis_oml(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 		proto_tree_add_item(oml_tree, hf_oml_length, tvb, offset++,
 				    1, TRUE);
 
+		if (global_oml_use_ericsson == TRUE) {
+			tvbuff_t *subtvb;
+			subtvb = tvb_new_subset(tvb, offset, len, len);
+
+			if (sub_om2000)
+				call_dissector(sub_om2000, subtvb, pinfo, tree);
+		} else {
+
 		switch (msg_disc) {
 		case ABIS_OM_MDISC_FOM:
 			offset = dissect_oml_fom(tvb, pinfo, oml_tree,
@@ -1222,6 +1234,8 @@ dissect_abis_oml(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 		default:
 			break;
 		}
+
+		}
 	}
 }
 
@@ -1569,6 +1583,11 @@ proto_register_abis_oml(void)
 		    "Use nanoBTS definitions",
 		    "Use ipaccess nanoBTS specific definitions for OML",
 		    &global_oml_use_nano_bts);
+
+	prefs_register_bool_preference(oml_module, "use_ericsson_oml",
+		    "Use Ericsson definitions",
+		    "Use Ericsson A-bis OML (OM2000) definitions for OML",
+		    &global_oml_use_ericsson);
 }
 
 /* This function is called once at startup and every time the user hits
@@ -1605,4 +1624,6 @@ proto_reg_handoff_abis_oml(void)
 		oml_fom_attr_vse._vs_num_entries =
 				array_length(oml_fom_attr_vals_bs11)-1;
 	}
+
+	sub_om2000 = find_dissector("gsm_abis_om2000");
 }
diff --git a/epan/dissectors/packet-l2tp.c b/epan/dissectors/packet-l2tp.c
index 4380bbc..0ebcd9d 100644
--- a/epan/dissectors/packet-l2tp.c
+++ b/epan/dissectors/packet-l2tp.c
@@ -148,6 +148,7 @@ static enum_val_t l2tpv3_cookies[] = {
 #define L2TPv3_PROTOCOL_AAL5    6
 #define L2TPv3_PROTOCOL_LAPD    7
 #define L2TPv3_PROTOCOL_DOCSIS_DMPT 8
+#define L2TPv3_PROTOCOL_ERICSSON 9
 
 static enum_val_t l2tpv3_protocols[] = {
     {"eth",     "Ethernet",     L2TPv3_PROTOCOL_ETH},
@@ -159,6 +160,7 @@ static enum_val_t l2tpv3_protocols[] = {
     {"aal5",    "AAL5",         L2TPv3_PROTOCOL_AAL5},
     {"lapd",    "LAPD",         L2TPv3_PROTOCOL_LAPD},
     {"docsis-dmpt", "DOCSIS-DMPT", L2TPv3_PROTOCOL_DOCSIS_DMPT},
+    {"ehdlc",	"Ericsson HDLC", L2TPv3_PROTOCOL_ERICSSON},
     {NULL, NULL, 0}
 };
 
@@ -583,6 +585,7 @@ static dissector_handle_t atm_oam_handle;
 static dissector_handle_t llc_handle;
 static dissector_handle_t lapd_handle;
 static dissector_handle_t mp2t_handle;
+static dissector_handle_t ehdlc_handle;
 static dissector_handle_t data_handle;
 
 /*
@@ -1498,6 +1501,9 @@ process_l2tpv3_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
 	case L2TPv3_PROTOCOL_LAPD:
 		call_dissector(lapd_handle, next_tvb, pinfo, tree);
 		break;
+	case L2TPv3_PROTOCOL_ERICSSON:
+		call_dissector(ehdlc_handle, next_tvb, pinfo, tree);
+		break;
 	default:
 		call_dissector(data_handle, next_tvb, pinfo, tree);
 		break;
@@ -2171,5 +2177,6 @@ proto_reg_handoff_l2tp(void)
 	llc_handle = find_dissector("llc");
 	lapd_handle = find_dissector("lapd");
 	mp2t_handle = find_dissector("mp2t");
+	ehdlc_handle = find_dissector("ehdlc");
 	data_handle = find_dissector("data");
 }
-- 
1.7.3.4