diff --git a/src/Makefile b/src/Makefile
index eadda10..aabecac 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -18,6 +18,8 @@ crc_test: crc_test.o tetra_common.o libosmo-tetra-mac.a
 
 tetra-rx: tetra-rx.o libosmo-tetra-phy.a libosmo-tetra-mac.a
 
+testsds: testsds.o libosmo-tetra-phy.a libosmo-tetra-mac.a
+
 conv_enc_test: conv_enc_test.o testpdu.o libosmo-tetra-phy.a libosmo-tetra-mac.a
 
 tunctl: tunctl.o
diff --git a/src/testsds.c b/src/testsds.c
new file mode 100644
index 0000000..366b3ee
--- /dev/null
+++ b/src/testsds.c
@@ -0,0 +1,97 @@
+/* testsds.c - a quick hack to test the sds parsing functions. 
+ * expects a copy of the sds binary dump from telive.log as an argument
+ *
+ * (C) 2015 by Jacek Lipkowski <sq5bpf@lipkowski.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <time.h>
+
+#include <arpa/inet.h>
+
+#include <osmocom/core/bits.h>
+
+
+#include "tetra_common.h"
+#include <lower_mac/crc_simple.h>
+#include <lower_mac/tetra_conv_enc.h>
+#include <lower_mac/tetra_interleave.h>
+#include <lower_mac/tetra_scramb.h>
+#include <lower_mac/tetra_rm3014.h>
+#include <lower_mac/viterbi.h>
+#include <phy/tetra_burst.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/talloc.h>
+
+#include "tetra_common.h"
+#include "tetra_prim.h"
+#include "tetra_upper_mac.h"
+#include "tetra_mac_pdu.h"
+#include "tetra_llc_pdu.h"
+#include "tetra_mm_pdu.h"
+#include "tetra_cmce_pdu.h"
+#include "tetra_sndcp_pdu.h"
+#include "tetra_mle_pdu.h"
+#include "tetra_gsmtap.h"
+#include "tetra_sds.h"
+
+extern int rx_tl_sdu(struct tetra_mac_state *tms, struct msgb *msg, unsigned int len);
+
+int char_to_ubits(char *c,unsigned char *out)
+{
+	int len=0;
+	while (*c) {
+		if (*c=='1') {  *out=1; } else { *out=0; }
+
+		c++;
+		len++;
+		out++;
+
+	}
+	return(len);
+}
+
+
+
+
+int main(int argc,char **argv) {
+	unsigned char buf1[8192];
+	unsigned char buf[8192];
+	int len,len1;
+
+	struct tetra_mac_state tms;
+	struct msgb msg;
+
+	//len1=char_to_ubits("0000000010011110100110001011110110010001111011001000100110",(char *)&buf1); //dummy header so the osmo-tetra functions work
+	len1=char_to_ubits("0000000010011110000000000000000000000001111011001000100110",(char *)&buf1); //dummy header so the osmo-tetra functions work
+	len=char_to_ubits(argv[1],(char *)&buf);
+	msg.l1h=(unsigned char *)&buf1;
+	msg.l3h=(unsigned char *)&buf;
+
+	parse_d_sds_data(&tms,&msg,len);
+
+}