diff --git a/include/osmo-bts/gsm_data_shared.h b/include/osmo-bts/gsm_data_shared.h
index 2d6ead12b..2c21865e8 100644
--- a/include/osmo-bts/gsm_data_shared.h
+++ b/include/osmo-bts/gsm_data_shared.h
@@ -818,6 +818,7 @@ struct gsm_bts {
 	int bcch_change_mark;
 
 	struct rate_ctr_group *ctrs;
+	bool supp_meas_toa256;
 
 	void *role;
 };
diff --git a/src/common/rsl.c b/src/common/rsl.c
index 5c266ba77..98e8913ba 100644
--- a/src/common/rsl.c
+++ b/src/common/rsl.c
@@ -2400,6 +2400,7 @@ static int rsl_tx_meas_res(struct gsm_lchan *lchan, uint8_t *l3, int l3_len, con
 	uint8_t meas_res[16];
 	uint8_t chan_nr = gsm_lchan2chan_nr(lchan);
 	int res_valid = lchan->meas.flags & LC_UL_M_F_RES_VALID;
+	struct gsm_bts *bts = lchan->ts->trx->bts;
 
 	LOGP(DRSL, LOGL_DEBUG,
 	     "%s chan_num:%u Tx MEAS RES valid(%d), flags(%02x)\n",
@@ -2429,6 +2430,17 @@ static int rsl_tx_meas_res(struct gsm_lchan *lchan, uint8_t *l3, int l3_len, con
 						meas_res);
 	lchan->tch.dtx.dl_active = false;
 	if (ie_len >= 3) {
+		if (bts->supp_meas_toa256) {
+			/* append signed 16bit value containing MS timing offset in 1/256th symbols
+			 * in the vendor-specific "Supplementary Measurement Information" part of
+			 * the uplink measurements IE.  This is the current offset *relative* to the
+			 * TA which the MS has already applied.  So if you want to know the total
+			 * propagation time between MS and BTS, you need to add the actual TA value
+			 * used (from L1_INFO below, in full symbols) plus the ms_toa256 value
+			 * in 1/256 symbol periods. */
+			meas_res[ie_len++] = lchan->meas.ms_toa256 >> 8;
+			meas_res[ie_len++] = lchan->meas.ms_toa256 & 0xff;
+		}
 		msgb_tlv_put(msg, RSL_IE_UPLINK_MEAS, ie_len, meas_res);
 		lchan->meas.flags &= ~LC_UL_M_F_RES_VALID;
 	}
diff --git a/src/common/vty.c b/src/common/vty.c
index 3938de5b1..b57e01920 100644
--- a/src/common/vty.c
+++ b/src/common/vty.c
@@ -295,6 +295,8 @@ static void config_write_bts_single(struct vty *vty, struct gsm_bts *bts)
 		VTY_NEWLINE);
 	if (strcmp(btsb->pcu.sock_path, PCU_SOCK_DEFAULT))
 		vty_out(vty, " pcu-socket %s%s", btsb->pcu.sock_path, VTY_NEWLINE);
+	if (bts->supp_meas_toa256)
+		vty_out(vty, " supp-meas-info toa256%s", VTY_NEWLINE);
 
 	bts_model_config_write_bts(vty, bts);
 
@@ -624,6 +626,30 @@ DEFUN(cfg_bts_pcu_sock, cfg_bts_pcu_sock_cmd,
 	return CMD_SUCCESS;
 }
 
+DEFUN(cfg_bts_supp_meas_toa256, cfg_bts_supp_meas_toa256_cmd,
+	"supp-meas-info toa256",
+	"Configure the RSL Supplementary Measurement Info\n"
+	"Report the TOA in 1/256th symbol periods\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct gsm_bts_role_bts *btsb = bts_role_bts(bts);
+
+	bts->supp_meas_toa256 = true;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_bts_no_supp_meas_toa256, cfg_bts_no_supp_meas_toa256_cmd,
+	"no supp-meas-info toa256",
+	NO_STR "Configure the RSL Supplementary Measurement Info\n"
+	"Report the TOA in 1/256th symbol periods\n")
+{
+	struct gsm_bts *bts = vty->index;
+	struct gsm_bts_role_bts *btsb = bts_role_bts(bts);
+
+	bts->supp_meas_toa256 = false;
+	return CMD_SUCCESS;
+}
+
 
 #define DB_DBM_STR 							\
 	"Unit is dB (decibels)\n"					\
@@ -1559,6 +1585,8 @@ int bts_vty_init(struct gsm_bts *bts, const struct log_info *cat)
 	install_element(BTS_NODE, &cfg_bts_min_qual_norm_cmd);
 	install_element(BTS_NODE, &cfg_bts_max_ber_rach_cmd);
 	install_element(BTS_NODE, &cfg_bts_pcu_sock_cmd);
+	install_element(BTS_NODE, &cfg_bts_supp_meas_toa256_cmd);
+	install_element(BTS_NODE, &cfg_bts_no_supp_meas_toa256_cmd);
 
 	install_element(BTS_NODE, &cfg_trx_gsmtap_sapi_cmd);
 	install_element(BTS_NODE, &cfg_trx_no_gsmtap_sapi_cmd);