diff --git a/src/abis_nm.c b/src/abis_nm.c
index 5fb53d7..9820d97 100644
--- a/src/abis_nm.c
+++ b/src/abis_nm.c
@@ -351,6 +351,8 @@
 		[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 },
 		/* ip.access specifics */
 		[NM_ATT_IPACC_RSL_BSC_IP] =	{ TLV_TYPE_FIXED, 4 },
 		[NM_ATT_IPACC_RSL_BSC_PORT] =	{ TLV_TYPE_FIXED, 2 },
@@ -1837,6 +1839,21 @@
 	return abis_nm_sendmsg(bts, msg);
 }
 
+int abis_nm_bs11_get_cclk(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t attr[] = { NM_ATT_BS11_CCLK_ACCURACY,
+			    NM_ATT_BS11_CCLK_TYPE };
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(attr), NM_MT_GET_ATTR,
+			NM_OC_BS11, BS11_OBJ_CCLK, 0x00, 0x00);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(attr), attr);
+
+	return abis_nm_sendmsg(bts, msg);
+
+}
 
 //static const u_int8_t bs11_logon_c7[] = { 0x07, 0xd9, 0x01, 0x11, 0x0d, 0x10, 0x20 };
 static const u_int8_t bs11_logon_c8[] = { 0x02 };