diff --git a/executables/nr-ru.c b/executables/nr-ru.c
index cac5b5d66a..1cad34145a 100644
--- a/executables/nr-ru.c
+++ b/executables/nr-ru.c
@@ -2057,6 +2057,16 @@ static void NRRCconfig_RU(void) {
         RC.ru[j]->openair0_cfg.sdr_addrs = strdup(*(RUParamList.paramarray[j][RU_SDR_ADDRS].strptr));
       }
 
+      if (config_isparamset(RUParamList.paramarray[j], RU_TX_SUBDEV)) {
+        RC.ru[j]->openair0_cfg.tx_subdev = strdup(*(RUParamList.paramarray[j][RU_TX_SUBDEV].strptr));
+	LOG_I(PHY, "RU USRP tx subdev == %s\n", RC.ru[j]->openair0_cfg.tx_subdev);
+      }
+
+      if (config_isparamset(RUParamList.paramarray[j], RU_RX_SUBDEV)) {
+        RC.ru[j]->openair0_cfg.rx_subdev = strdup(*(RUParamList.paramarray[j][RU_RX_SUBDEV].strptr));
+	LOG_I(PHY, "RU USRP rx subdev == %s\n", RC.ru[j]->openair0_cfg.rx_subdev);
+      }
+
       if (config_isparamset(RUParamList.paramarray[j], RU_SDR_CLK_SRC)) {
         if (strcmp(*(RUParamList.paramarray[j][RU_SDR_CLK_SRC].strptr), "internal") == 0) {
           RC.ru[j]->openair0_cfg.clock_source = internal;
diff --git a/openair2/ENB_APP/enb_paramdef.h b/openair2/ENB_APP/enb_paramdef.h
index e6e97069fa..50ee4341ee 100644
--- a/openair2/ENB_APP/enb_paramdef.h
+++ b/openair2/ENB_APP/enb_paramdef.h
@@ -103,6 +103,8 @@ typedef enum {
 #define CONFIG_STRING_RU_SL_AHEAD                 "sl_ahead"
 #define CONFIG_STRING_RU_NR_FLAG                  "nr_flag"
 #define CONFIG_STRING_RU_NR_SCS_FOR_RASTER        "nr_scs_for_raster"
+#define CONFIG_STRING_RU_TX_SUBDEV                "tx_subdev"
+#define CONFIG_STRING_RU_RX_SUBDEV                "rx_subdev"
 
 #define HLP_RU_SF_AHEAD "LTE TX processing advance"
 #define HLP_RU_SL_AHEAD "NR TX processing advance"
@@ -142,6 +144,8 @@ typedef enum {
 #define RU_SL_AHEAD                   30 
 #define RU_NR_FLAG                    31 
 #define RU_NR_SCS_FOR_RASTER          32
+#define RU_TX_SUBDEV                  33
+#define RU_RX_SUBDEV                  34
 /*-----------------------------------------------------------------------------------------------------------------------------------------*/
 /*                                            RU configuration parameters                                                                  */
 /*   optname                                   helpstr   paramflags    XXXptr          defXXXval                   type      numelt        */
@@ -180,6 +184,8 @@ typedef enum {
     {CONFIG_STRING_RU_SL_AHEAD,          HLP_RU_SL_AHEAD,      0,       iptr:NULL,       defintval:6,             TYPE_INT,         0}, \
     {CONFIG_STRING_RU_NR_FLAG,           HLP_RU_NR_FLAG,       0,       iptr:NULL,       defintval:0,             TYPE_INT,         0}, \
     {CONFIG_STRING_RU_NR_SCS_FOR_RASTER, HLP_RU_NR_SCS_FOR_RASTER, 0,   iptr:NULL,       defintval:1,             TYPE_INT,         0}, \
+    {CONFIG_STRING_RU_TX_SUBDEV,                   NULL,       0,       strptr:NULL,     defstrval:"",            TYPE_STRING,      0}, \
+    {CONFIG_STRING_RU_RX_SUBDEV,                   NULL,       0,       strptr:NULL,     defstrval:"",            TYPE_STRING,      0}, \
   }
 
 /*---------------------------------------------------------------------------------------------------------------------------------------*/
diff --git a/targets/ARCH/COMMON/common_lib.h b/targets/ARCH/COMMON/common_lib.h
index 95e5e3ed03..fecc4abb63 100644
--- a/targets/ARCH/COMMON/common_lib.h
+++ b/targets/ARCH/COMMON/common_lib.h
@@ -178,6 +178,10 @@ typedef struct {
   int rx_num_channels;
   //! number of TX channels (=TX antennas)
   int tx_num_channels;
+  //! rx daughter card
+  char* rx_subdev;
+  //! tx daughter card
+  char* tx_subdev;
   //! \brief RX base addresses for mmapped_dma
   int32_t *rxbase[4];
   //! \brief TX base addresses for mmapped_dma
diff --git a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
index b4d7ba0410..07162415d2 100644
--- a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+++ b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
@@ -1021,7 +1021,7 @@ extern "C" {
     sscanf(uhd::get_version_string().c_str(),"%d.%d.%d",&vers,&subvers,&subsubvers);
     LOG_I(HW,"UHD version %s (%d.%d.%d)\n",
           uhd::get_version_string().c_str(),vers,subvers,subsubvers);
-    std::string args;
+    std::string args,tx_subdev,rx_subdev;
 
     if (openair0_cfg[0].sdr_addrs == NULL) {
       args = "type=b200";
@@ -1347,6 +1347,13 @@ extern "C" {
 
   LOG_D(HW, "usrp->get_tx_num_channels() == %zd\n", s->usrp->get_tx_num_channels());
   LOG_D(HW, "openair0_cfg[0].tx_num_channels == %d\n", openair0_cfg[0].tx_num_channels);
+  LOG_I(HW, "openair0_cfg[0].tx_subdev == %s\n", openair0_cfg[0].tx_subdev);
+  LOG_I(HW, "openair0_cfg[0].rx_subdev == %s\n", openair0_cfg[0].rx_subdev);
+
+  tx_subdev = openair0_cfg[0].tx_subdev;
+  rx_subdev = openair0_cfg[0].rx_subdev;
+  s->usrp->set_tx_subdev_spec(tx_subdev);
+  s->usrp->set_rx_subdev_spec(rx_subdev);
 
   for(int i=0; i<((int) s->usrp->get_tx_num_channels()); i++) {
     ::uhd::gain_range_t gain_range_tx = s->usrp->get_tx_gain_range(i);
@@ -1419,6 +1426,7 @@ extern "C" {
     LOG_I(HW,"  Actual TX packet size: %lu\n",s->tx_stream->get_max_num_samps());
   }
 
+  std::cout << boost::format("Using Device: %s") % s->usrp->get_pp_string() << std::endl;
   LOG_I(HW,"Device timestamp: %f...\n", s->usrp->get_time_now().get_real_secs());
   device->trx_write_func = trx_usrp_write;
   device->trx_read_func  = trx_usrp_read;