diff --git a/Conf.cpp b/Conf.cpp
index 0b573bb..a83792e 100644
--- a/Conf.cpp
+++ b/Conf.cpp
@@ -196,6 +196,8 @@ m_fmCTCSSThreshold(40U),
 m_fmCTCSSLevel(2.0F),
 m_fmKerchunkTime(0U),
 m_fmHangTime(7U),
+m_fmUseCOS(true),
+m_fmRXBoost(1U),
 m_dstarNetworkEnabled(false),
 m_dstarGatewayAddress(),
 m_dstarGatewayPort(0U),
@@ -746,6 +748,10 @@ bool CConf::read()
 			m_fmKerchunkTime = (unsigned int)::atoi(value);
 		else if (::strcmp(key, "HangTime") == 0)
 			m_fmHangTime = (unsigned int)::atoi(value);
+		else if (::strcmp(key, "UseCOS") == 0)
+			m_fmUseCOS = ::atoi(value) == 1;
+		else if (::strcmp(key, "RXBoost") == 0)
+			m_fmRXBoost = (unsigned int)::atoi(value);
 	} else if (section == SECTION_DSTAR_NETWORK) {
 		if (::strcmp(key, "Enable") == 0)
 			m_dstarNetworkEnabled = ::atoi(value) == 1;
@@ -1603,6 +1609,16 @@ unsigned int CConf::getFMHangTime() const
 	return m_fmHangTime;
 }
 
+bool CConf::getFMUseCOS() const
+{
+	return m_fmUseCOS;
+}
+
+unsigned int CConf::getFMRXBoost() const
+{
+	return m_fmRXBoost;
+}
+
 bool CConf::getDStarNetworkEnabled() const
 {
 	return m_dstarNetworkEnabled;
diff --git a/Conf.h b/Conf.h
index 7be95d6..1e2ac51 100644
--- a/Conf.h
+++ b/Conf.h
@@ -194,6 +194,8 @@ public:
   float        getFMCTCSSLevel() const;
   unsigned int getFMKerchunkTime() const;
   unsigned int getFMHangTime() const;
+  bool         getFMUseCOS() const;
+  unsigned int getFMRXBoost() const;
 
   // The D-Star Network section
   bool         getDStarNetworkEnabled() const;
@@ -455,6 +457,8 @@ private:
   float        m_fmCTCSSLevel;
   unsigned int m_fmKerchunkTime;
   unsigned int m_fmHangTime;
+  bool         m_fmUseCOS;
+  unsigned int m_fmRXBoost;
 
   bool         m_dstarNetworkEnabled;
   std::string  m_dstarGatewayAddress;
diff --git a/MMDVM.ini b/MMDVM.ini
index 25aabde..36b1c1b 100644
--- a/MMDVM.ini
+++ b/MMDVM.ini
@@ -164,6 +164,8 @@ CTCSSThreshold=30
 CTCSSLevel=20
 KerchunkTime=0
 HangTime=7
+UseCOS=1
+RXBoost=1
 
 [D-Star Network]
 Enable=1
diff --git a/MMDVMHost.cpp b/MMDVMHost.cpp
index 123f4ee..2ba9346 100644
--- a/MMDVMHost.cpp
+++ b/MMDVMHost.cpp
@@ -1229,6 +1229,8 @@ bool CMMDVMHost::createModem()
 		float        ctcssLevel        = m_conf.getFMCTCSSLevel();
 		unsigned int kerchunkTime      = m_conf.getFMKerchunkTime();
 		unsigned int hangTime          = m_conf.getFMHangTime();
+		bool         useCOS            = m_conf.getFMUseCOS();
+		unsigned int rxBoost           = m_conf.getFMRXBoost();
 
 		LogInfo("FM Parameters");
 		LogInfo("    Callsign: %s", callsign.c_str());
@@ -1254,10 +1256,12 @@ bool CMMDVMHost::createModem()
 		LogInfo("    CTCSS Level: %.1f%%", ctcssLevel);
 		LogInfo("    Kerchunk Time: %us", kerchunkTime);
 		LogInfo("    Hang Time: %us", hangTime);
+		LogInfo("    Use COS: %s", useCOS ? "yes" : "no");
+		LogInfo("    RX Boost: x%u", rxBoost);
 
 		m_modem->setFMCallsignParams(callsign, callsignSpeed, callsignFrequency, callsignTime, callsignHoldoff, callsignHighLevel, callsignLowLevel, callsignAtStart, callsignAtEnd);
 		m_modem->setFMAckParams(rfAck, ackSpeed, ackFrequency, ackMinTime, ackDelay, ackLevel);
-		m_modem->setFMMiscParams(timeout, timeoutLevel, ctcssFrequency, ctcssThreshold, ctcssLevel, kerchunkTime, hangTime);
+		m_modem->setFMMiscParams(timeout, timeoutLevel, ctcssFrequency, ctcssThreshold, ctcssLevel, kerchunkTime, hangTime, useCOS, rxBoost);
 	}
 
 	bool ret = m_modem->open();
diff --git a/Modem.cpp b/Modem.cpp
index 5bc6485..2f6d24b 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -190,7 +190,9 @@ m_fmCtcssFrequency(88.4F),
 m_fmCtcssThreshold(25U),
 m_fmCtcssLevel(10.0F),
 m_fmKerchunkTime(0U),
-m_fmHangTime(5U)
+m_fmHangTime(5U),
+m_fmUseCOS(true),
+m_fmRXBoost(1U)
 {
 	m_buffer = new unsigned char[BUFFER_LENGTH];
 
@@ -1902,7 +1904,7 @@ void CModem::setFMAckParams(const std::string& rfAck, unsigned int ackSpeed, uns
 	m_fmAckLevel     = ackLevel;
 }
 
-void CModem::setFMMiscParams(unsigned int timeout, float timeoutLevel, float ctcssFrequency, unsigned int ctcssThreshold, float ctcssLevel, unsigned int kerchunkTime, unsigned int hangTime)
+void CModem::setFMMiscParams(unsigned int timeout, float timeoutLevel, float ctcssFrequency, unsigned int ctcssThreshold, float ctcssLevel, unsigned int kerchunkTime, unsigned int hangTime, bool useCOS, unsigned int rxBoost)
 {
 	m_fmTimeout      = timeout;
 	m_fmTimeoutLevel = timeoutLevel;
@@ -1913,6 +1915,9 @@ void CModem::setFMMiscParams(unsigned int timeout, float timeoutLevel, float ctc
 
 	m_fmKerchunkTime = kerchunkTime;
 	m_fmHangTime     = hangTime;
+
+	m_fmUseCOS       = useCOS;
+	m_fmRXBoost      = rxBoost;
 }
 
 bool CModem::setFMCallsignParams()
@@ -2033,7 +2038,7 @@ bool CModem::setFMMiscParams()
 	unsigned char buffer[20U];
 
 	buffer[0U] = MMDVM_FRAME_START;
-	buffer[1U] = 10U;
+	buffer[1U] = 12U;
 	buffer[2U] = MMDVM_FM_PARAMS3;
 
 	buffer[3U] = m_fmTimeout / 5U;
@@ -2046,10 +2051,16 @@ bool CModem::setFMMiscParams()
 	buffer[8U] = m_fmKerchunkTime;
 	buffer[9U] = m_fmHangTime;
 
-	// CUtils::dump(1U, "Written", buffer, 10U);
+	buffer[10U] = 0x00U;
+	if (m_fmUseCOS)
+		buffer[10U] |= 0x01U;
 
-	int ret = m_serial->write(buffer, 10U);
-	if (ret != 10)
+	buffer[11U] = m_fmRXBoost;
+
+	// CUtils::dump(1U, "Written", buffer, 12U);
+
+	int ret = m_serial->write(buffer, 12U);
+	if (ret != 12)
 		return false;
 
 	unsigned int count = 0U;
diff --git a/Modem.h b/Modem.h
index d879b1c..2aecf67 100644
--- a/Modem.h
+++ b/Modem.h
@@ -47,7 +47,7 @@ public:
 
 	virtual void setFMCallsignParams(const std::string& callsign, unsigned int callsignSpeed, unsigned int callsignFrequency, unsigned int callsignTime, unsigned int callsignHoldoff, float callsignHighLevel, float callsignLowLevel, bool callsignAtStart, bool callsignAtEnd);
 	virtual void setFMAckParams(const std::string& rfAck, unsigned int ackSpeed, unsigned int ackFrequency, unsigned int ackMinTime, unsigned int ackDelay, float ackLevel);
-	virtual void setFMMiscParams(unsigned int timeout, float timeoutLevel, float ctcssFrequency, unsigned int ctcssThreshold, float ctcssLevel, unsigned int kerchunkTime, unsigned int hangTime);
+	virtual void setFMMiscParams(unsigned int timeout, float timeoutLevel, float ctcssFrequency, unsigned int ctcssThreshold, float ctcssLevel, unsigned int kerchunkTime, unsigned int hangTime, bool useCOS, unsigned int rxBoost);
 
 	virtual bool open();
 
@@ -206,6 +206,8 @@ private:
 	float                      m_fmCtcssLevel;
 	unsigned int               m_fmKerchunkTime;
 	unsigned int               m_fmHangTime;
+	bool                       m_fmUseCOS;
+	unsigned int               m_fmRXBoost;
 
 	bool readVersion();
 	bool readStatus();
diff --git a/Version.h b/Version.h
index b5fc453..5247a92 100644
--- a/Version.h
+++ b/Version.h
@@ -19,6 +19,6 @@
 #if !defined(VERSION_H)
 #define	VERSION_H
 
-const char* VERSION = "20200424";
+const char* VERSION = "20200425";
 
 #endif