diff --git a/openbsc/src/bts_siemens_bs11.c b/openbsc/src/bts_siemens_bs11.c
new file mode 100644
index 0000000..1c8f889
--- /dev/null
+++ b/openbsc/src/bts_siemens_bs11.c
@@ -0,0 +1,66 @@
+/* Siemens BS-11 specific code */
+
+/* (C) 2009-2010 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 <sys/types.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/tlv.h>
+#include <openbsc/abis_nm.h>
+
+static struct gsm_bts_model model_bs11 = {
+	.type = GSM_BTS_TYPE_BS11,
+	.nm_att_tlvdef = {
+		.def = {
+			[NM_ATT_AVAIL_STATUS] =		{ TLV_TYPE_TLV },
+			/* BS11 specifics */
+			[NM_ATT_BS11_ESN_FW_CODE_NO] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_ESN_HW_CODE_NO] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_ESN_PCB_SERIAL] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_BOOT_SW_VERS] =	{ TLV_TYPE_TLV },
+			[0xd5] =			{ TLV_TYPE_TLV },
+			[0xa8] =			{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_PASSWORD] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_TXPWR] =		{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_RSSI_OFFS] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_LINE_CFG] = 	{ TLV_TYPE_TV },
+			[NM_ATT_BS11_L1_PROT_TYPE] =	{ TLV_TYPE_TV },
+			[NM_ATT_BS11_BIT_ERR_THESH] =	{ TLV_TYPE_FIXED, 2 },
+			[NM_ATT_BS11_DIVERSITY] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_LMT_LOGON_SESSION]={ TLV_TYPE_TLV },	
+			[NM_ATT_BS11_LMT_LOGIN_TIME] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_LMT_USER_ACC_LEV] ={ TLV_TYPE_TLV },
+			[NM_ATT_BS11_LMT_USER_NAME] =	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_BTS_STATE]	=	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_E1_STATE]	=	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_PLL_MODE]	=	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_PLL]	=	{ TLV_TYPE_TLV },
+			[NM_ATT_BS11_CCLK_ACCURACY] =	{ TLV_TYPE_TV },
+			[NM_ATT_BS11_CCLK_TYPE] =	{ TLV_TYPE_TV },
+			[0x95] =			{ TLV_TYPE_FIXED, 2 },
+		},
+	},
+};
+
+int bts_model_bs11_init(void)
+{
+	return gsm_bts_model_register(&model_bs11);
+}