diff --git a/src/gsm_utils.c b/src/gsm_utils.c
new file mode 100644
index 0000000..b0a66a6
--- /dev/null
+++ b/src/gsm_utils.c
@@ -0,0 +1,215 @@
+/*
+ * (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+//#include <openbsc/gsm_data.h>
+#include <osmocore/utils.h>
+#include <osmocore/gsm_utils.h>
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "../config.h"
+
+/* GSM 03.38 6.2.1 Charachter packing */
+int gsm_7bit_decode(char *text, const uint8_t *user_data, uint8_t length)
+{
+	int i = 0;
+	int l = 0;
+
+        /* FIXME: We need to account for user data headers here */
+	i += l;
+	for (; i < length; i ++)
+		*(text ++) =
+			((user_data[(i * 7 + 7) >> 3] <<
+			  (7 - ((i * 7 + 7) & 7))) |
+			 (user_data[(i * 7) >> 3] >>
+			  ((i * 7) & 7))) & 0x7f;
+	*text = '\0';
+
+	return i - l;
+}
+
+
+/* GSM 03.38 6.2.1 Charachter packing */
+int gsm_7bit_encode(uint8_t *result, const char *data)
+{
+	int i,j = 0;
+	unsigned char ch1, ch2;
+	int shift = 0;
+
+	for ( i=0; i<strlen(data); i++ ) {
+
+		ch1 = data[i] & 0x7F;
+		ch1 = ch1 >> shift;
+		ch2 = data[(i+1)] & 0x7F;
+		ch2 = ch2 << (7-shift);
+
+		ch1 = ch1 | ch2;
+
+		result[j++] = ch1;
+
+		shift++;
+
+		if ((shift == 7) && (i+1<strlen(data))) {
+			shift = 0;
+			i++;
+		}
+	}
+
+	return i;
+}
+
+/* determine power control level for given dBm value, as indicated
+ * by the tables in chapter 4.1.1 of GSM TS 05.05 */
+int ms_pwr_ctl_lvl(enum gsm_band band, unsigned int dbm)
+{
+	switch (band) {
+	case GSM_BAND_450:
+	case GSM_BAND_480:
+	case GSM_BAND_750:
+	case GSM_BAND_900:
+	case GSM_BAND_810:
+	case GSM_BAND_850:
+		if (dbm >= 39)
+			return 0;
+		else if (dbm < 5)
+			return 19;
+		else {
+			/* we are guaranteed to have (5 <= dbm < 39) */
+			return 2 + ((39 - dbm) / 2);
+		}
+		break;
+	case GSM_BAND_1800:
+		if (dbm >= 36)
+			return 29;
+		else if (dbm >= 34)	
+			return 30;
+		else if (dbm >= 32)
+			return 31;
+		else if (dbm == 31)
+			return 0;
+		else {
+			/* we are guaranteed to have (0 <= dbm < 31) */
+			return (30 - dbm) / 2;
+		}
+		break;
+	case GSM_BAND_1900:
+		if (dbm >= 33)
+			return 30;
+		else if (dbm >= 32)
+			return 31;
+		else if (dbm == 31)
+			return 0;
+		else {
+			/* we are guaranteed to have (0 <= dbm < 31) */
+			return (30 - dbm) / 2;
+		}
+		break;
+	}
+	return -EINVAL;
+}
+
+int ms_pwr_dbm(enum gsm_band band, uint8_t lvl)
+{
+	lvl &= 0x1f;
+
+	switch (band) {
+	case GSM_BAND_450:
+	case GSM_BAND_480:
+	case GSM_BAND_750:
+	case GSM_BAND_900:
+	case GSM_BAND_810:
+	case GSM_BAND_850:
+		if (lvl < 2)
+			return 39;
+		else if (lvl < 20)
+			return 39 - ((lvl - 2) * 2) ;
+		else
+			return 5;
+		break;
+	case GSM_BAND_1800:
+		if (lvl < 16)
+			return 30 - (lvl * 2);
+		else if (lvl < 29)
+			return 0;
+		else
+			return 36 - ((lvl - 29) * 2);
+		break;
+	case GSM_BAND_1900:
+		if (lvl < 16)
+			return 30 - (lvl * 2);
+		else if (lvl < 30)
+			return -EINVAL;
+		else
+			return 33 - (lvl - 30);
+		break;
+	}
+	return -EINVAL;
+}
+
+/* According to TS 08.05 Chapter 8.1.4 */
+int rxlev2dbm(uint8_t rxlev)
+{
+	if (rxlev > 63)
+		rxlev = 63;
+
+	return -110 + rxlev;
+}
+
+/* According to TS 08.05 Chapter 8.1.4 */
+uint8_t dbm2rxlev(int dbm)
+{
+	int rxlev = dbm + 110;
+
+	if (rxlev > 63)
+		rxlev = 63;
+	else if (rxlev < 0)
+		rxlev = 0;
+
+	return rxlev;
+}
+
+#ifdef HAVE_EXECINFO_H
+#include <execinfo.h>
+void generate_backtrace()
+{
+	int i, nptrs;
+	void *buffer[100];
+	char **strings;
+
+	nptrs = backtrace(buffer, ARRAY_SIZE(buffer));
+	printf("backtrace() returned %d addresses\n", nptrs);
+
+	strings = backtrace_symbols(buffer, nptrs);
+	if (!strings)
+		return;
+
+	for (i = 1; i < nptrs; i++)
+		printf("%s\n", strings[i]);
+
+	free(strings);
+}
+#endif