diff --git a/openbsc/include/openbsc/abis_nm.h b/openbsc/include/openbsc/abis_nm.h
index 9d9b8c1..d5c7a13 100644
--- a/openbsc/include/openbsc/abis_nm.h
+++ b/openbsc/include/openbsc/abis_nm.h
@@ -793,6 +793,7 @@
 int abis_nm_bs11_set_trx1_pw(struct gsm_bts *bts, const char *password);
 int abis_nm_bs11_set_pll_locked(struct gsm_bts *bts, int locked);
 int abis_nm_bs11_get_pll_mode(struct gsm_bts *bts);
+int abis_nm_bs11_set_pll(struct gsm_bts *bts, int value);
 int abis_nm_bs11_get_cclk(struct gsm_bts *bts);
 int abis_nm_bs11_get_state(struct gsm_bts *bts);
 int abis_nm_bs11_load_swl(struct gsm_bts *bts, const char *fname,
diff --git a/openbsc/src/abis_nm.c b/openbsc/src/abis_nm.c
index bcfce68..d679d78 100644
--- a/openbsc/src/abis_nm.c
+++ b/openbsc/src/abis_nm.c
@@ -2495,6 +2495,27 @@
 	return abis_nm_sendmsg(bts, msg);
 }
 
+/* Set the calibration value of the PLL (work value/set value)
+ * It depends on the login which one is changed */
+int abis_nm_bs11_set_pll(struct gsm_bts *bts, int value)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg;
+	u_int8_t tlv_value[2];
+
+	msg = nm_msgb_alloc();
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 3, NM_MT_BS11_SET_ATTR, NM_OC_BS11,
+			BS11_OBJ_TRX1, 0x00, 0x00);
+
+	tlv_value[0] = value>>8;
+	tlv_value[1] = value&0xff;
+
+	msgb_tlv_put(msg, NM_ATT_BS11_PLL, 2, tlv_value);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
 int abis_nm_bs11_get_state(struct gsm_bts *bts)
 {
 	return __simple_cmd(bts, NM_MT_BS11_GET_STATE);