diff --git a/Transceiver52M/UHDDevice.cpp b/Transceiver52M/UHDDevice.cpp
index bb1ea79..72d1458 100644
--- a/Transceiver52M/UHDDevice.cpp
+++ b/Transceiver52M/UHDDevice.cpp
@@ -210,7 +210,7 @@ public:
 	uhd_device(int sps, bool skip_rx);
 	~uhd_device();
 
-	int open(const std::string &args, ReferenceType ref);
+	int open(const std::string &args, ReferenceType ref, const std::string &subdev);
 	bool start();
 	bool stop();
 	void restart(uhd::time_spec_t ts);
@@ -545,7 +545,7 @@ bool uhd_device::parse_dev_type()
 	return true;
 }
 
-int uhd_device::open(const std::string &args, ReferenceType ref)
+int uhd_device::open(const std::string &args, ReferenceType ref, const std::string &subdev)
 {
 	// Find UHD devices
 	uhd::device_addr_t addr(args);
@@ -570,6 +570,12 @@ int uhd_device::open(const std::string &args, ReferenceType ref)
 
 	set_ref_clk(ref);
 
+	//specify subdevice (daughterboard)
+	if(!subdev.empty()) {
+		usrp_dev->set_tx_subdev_spec(subdev);
+		usrp_dev->set_rx_subdev_spec(subdev);
+	}
+
 	// Create TX and RX streamers
 	uhd::stream_args_t stream_args("sc16");
 	tx_stream = usrp_dev->get_tx_stream(stream_args);
diff --git a/Transceiver52M/radioDevice.h b/Transceiver52M/radioDevice.h
index 4017439..7df91c9 100644
--- a/Transceiver52M/radioDevice.h
+++ b/Transceiver52M/radioDevice.h
@@ -43,7 +43,7 @@ class RadioDevice {
   virtual ~RadioDevice() { }
 
   /** Initialize the USRP */
-  virtual int open(const std::string &args, ReferenceType ref)=0;
+  virtual int open(const std::string &args, ReferenceType ref, const std::string &subdev = "")=0;
 
   /** Start the USRP */
   virtual bool start()=0;
diff --git a/Transceiver52M/runTransceiver.cpp b/Transceiver52M/runTransceiver.cpp
index c06d3c3..8a6854b 100644
--- a/Transceiver52M/runTransceiver.cpp
+++ b/Transceiver52M/runTransceiver.cpp
@@ -112,7 +112,7 @@ int testConfig(const char *filename)
 int main(int argc, char *argv[])
 {
   int trxPort, radioType, fail = 0;
-  std::string deviceArgs, logLevel, trxAddr, refstr;
+  std::string deviceArgs, logLevel, trxAddr, refstr, subdev;
   RadioDevice *usrp = NULL;
   RadioDevice::ReferenceType refType;
   RadioInterface *radio = NULL;
@@ -142,6 +142,7 @@ int main(int argc, char *argv[])
   logLevel = gConfig.getStr("Log.Level");
   trxPort = gConfig.getNum("TRX.Port");
   trxAddr = gConfig.getStr("TRX.IP");
+  subdev = gConfig.getStr("TRX.Subdevice");
 
   if (gConfig.defines("TRX.Reference"))
     refstr = gConfig.getStr("TRX.Reference");
diff --git a/apps/GetConfigurationKeys.cpp b/apps/GetConfigurationKeys.cpp
index 6360639..11b735f 100644
--- a/apps/GetConfigurationKeys.cpp
+++ b/apps/GetConfigurationKeys.cpp
@@ -3078,6 +3078,17 @@ ConfigurationKeyMap getConfigurationKeys()
 	map[tmp.getName()] = tmp;
 	}
 
+	{ ConfigurationKey tmp("TRX.Subdevice","",
+		"",
+		ConfigurationKey::CUSTOMERWARN,
+		ConfigurationKey::STRING,
+		"",
+		true,
+		"This value is a string that specifies a subdevice for Ettus Hardware."
+	);
+	map[tmp.getName()] = tmp;
+	}
+
 	{ ConfigurationKey tmp("TRX.Timeout.Clock","10",
 		"seconds",
 		ConfigurationKey::DEVELOPER,
diff --git a/apps/OpenBTS.example.sql b/apps/OpenBTS.example.sql
index 1610138..421072e 100644
--- a/apps/OpenBTS.example.sql
+++ b/apps/OpenBTS.example.sql
@@ -237,6 +237,7 @@ INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.RadioFrequencyOffset','128',1,0,'Fine
 INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.Timeout.Clock','10',0,0,'How long to wait during a read operation from the Transceiver before giving up.');
 INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.Timeout.Start','2',0,0,'How long to wait during system startup before checking to see if the Transceiver can be reached.');
 INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.TxAttenOffset','0',1,0,'Hardware-specific gain adjustment for transmitter, matched to the power amplifier, expessed as an attenuation in dB.  Set at the factory.  Do not adjust without proper calibration.  Static.');
+INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.Subdevice','',1,0,'Subdevice (Daughterboard) to use on Ettus hardware that supports it');
 INSERT OR IGNORE INTO "CONFIG" VALUES('TRX.Reference','internal',0,0,'TRX reference type ("internal", "external", "gpsdo")');
 INSERT OR IGNORE INTO "CONFIG" VALUES('Test.GSM.SimulatedFER.Downlink','0',0,0,'Probability (0-100) of dropping any downlink frame to test robustness.');
 INSERT OR IGNORE INTO "CONFIG" VALUES('Test.GSM.SimulatedFER.Uplink','0',0,0,'Probability (0-100) of dropping any uplink frame to test robustness.');