diff --git a/MMDVMHost.cpp b/MMDVMHost.cpp
index 58b678b..82b54fa 100644
--- a/MMDVMHost.cpp
+++ b/MMDVMHost.cpp
@@ -296,6 +296,51 @@ int CMMDVMHost::run()
 	if (!ret)
 		return 1;
 
+	if (m_dstarEnabled && !m_modem->hasDStar()) {
+		LogWarning("D-Star enabled in the host but not in the modem firmware, disabling");
+		m_dstarEnabled = false;
+	}
+
+	if (m_dmrEnabled && !m_modem->hasDMR()) {
+		LogWarning("DMR enabled in the host but not in the modem firmware, disabling");
+		m_dmrEnabled = false;
+	}
+
+	if (m_ysfEnabled && !m_modem->hasYSF()) {
+		LogWarning("YSF enabled in the host but not in the modem firmware, disabling");
+		m_ysfEnabled = false;
+	}
+
+	if (m_p25Enabled && !m_modem->hasP25()) {
+		LogWarning("P25 enabled in the host but not in the modem firmware, disabling");
+		m_p25Enabled = false;
+	}
+
+	if (m_nxdnEnabled && !m_modem->hasNXDN()) {
+		LogWarning("NXDN enabled in the host but not in the modem firmware, disabling");
+		m_nxdnEnabled = false;
+	}
+
+	if (m_m17Enabled && !m_modem->hasM17()) {
+		LogWarning("M17 enabled in the host but not in the modem firmware, disabling");
+		m_m17Enabled = false;
+	}
+
+	if (m_fmEnabled && !m_modem->hasFM()) {
+		LogWarning("FM enabled in the host but not in the modem firmware, disabling");
+		m_fmEnabled = false;
+	}
+
+	if (m_pocsagEnabled && !m_modem->hasPOCSAG()) {
+		LogWarning("POCSAG enabled in the host but not in the modem firmware, disabling");
+		m_pocsagEnabled = false;
+	}
+
+	if (m_ax25Enabled && !m_modem->hasAX25()) {
+		LogWarning("AX.25 enabled in the host but not in the modem firmware, disabling");
+		m_ax25Enabled = false;
+	}
+
 	m_display = CDisplay::createDisplay(m_conf, m_modem);
 
 	if (m_dstarEnabled && m_conf.getDStarNetworkEnabled()) {
@@ -341,9 +386,13 @@ int CMMDVMHost::run()
 	}
 
 	if (m_fmEnabled && m_conf.getFMNetworkEnabled()) {
-		ret = createFMNetwork();
-		if (!ret)
-			return 1;
+		if (m_modem->getVersion() == 1U) {
+			LogWarning("FM networking enabled in the host but not available the modem firmware, disabling");
+		} else {
+			ret = createFMNetwork();
+			if (!ret)
+				return 1;
+		}
 	}
 
 	if (m_ax25Enabled && m_conf.getAX25NetworkEnabled()) {
diff --git a/Modem.cpp b/Modem.cpp
index 2ab35f4..6f34167 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -110,6 +110,16 @@ const unsigned int MAX_RESPONSES = 30U;
 
 const unsigned int BUFFER_LENGTH = 2000U;
 
+const unsigned char CAP1_DSTAR  = 0x01U;
+const unsigned char CAP1_DMR    = 0x02U;
+const unsigned char CAP1_YSF    = 0x04U;
+const unsigned char CAP1_P25    = 0x08U;
+const unsigned char CAP1_NXDN   = 0x10U;
+const unsigned char CAP1_M17    = 0x20U;
+const unsigned char CAP1_FM     = 0x40U;
+const unsigned char CAP2_POCSAG = 0x01U;
+const unsigned char CAP2_AX25   = 0x02U;
+
 
 CModem::CModem(bool duplex, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int dmrDelay, bool useCOSAsLockout, bool trace, bool debug) :
 m_protocolVersion(0U),
@@ -240,7 +250,9 @@ m_fmSquelchLowThreshold(20U),
 m_fmRFAudioBoost(1U),
 m_fmExtAudioBoost(1U),
 m_fmMaxDevLevel(90.0F),
-m_fmExtEnable(false)
+m_fmExtEnable(false),
+m_capabilities1(0x00U),
+m_capabilities2(0x00U)
 {
 	m_buffer = new unsigned char[BUFFER_LENGTH];
 }
@@ -1901,6 +1913,56 @@ bool CModem::hasError() const
 	return m_error;
 }
 
+bool CModem::hasDStar() const
+{
+	return (m_capabilities1 & CAP1_DSTAR) == CAP1_DSTAR;
+}
+
+bool CModem::hasDMR() const
+{
+	return (m_capabilities1 & CAP1_DMR) == CAP1_DMR;
+}
+
+bool CModem::hasYSF() const
+{
+	return (m_capabilities1 & CAP1_YSF) == CAP1_YSF;
+}
+
+bool CModem::hasP25() const
+{
+	return (m_capabilities1 & CAP1_P25) == CAP1_P25;
+}
+
+bool CModem::hasNXDN() const
+{
+	return (m_capabilities1 & CAP1_NXDN) == CAP1_NXDN;
+}
+
+bool CModem::hasM17() const
+{
+	return (m_capabilities1 & CAP1_M17) == CAP1_M17;
+}
+
+bool CModem::hasFM() const
+{
+	return (m_capabilities1 & CAP1_FM) == CAP1_FM;
+}
+
+bool CModem::hasPOCSAG() const
+{
+	return (m_capabilities2 & CAP2_POCSAG) == CAP2_POCSAG;
+}
+
+bool CModem::hasAX25() const
+{
+	return (m_capabilities2 & CAP2_AX25) == CAP2_AX25;
+}
+
+unsigned int CModem::getVersion() const
+{
+	return m_protocolVersion;
+}
+
 bool CModem::readVersion()
 {
 	assert(m_port != NULL);
@@ -1956,6 +2018,8 @@ bool CModem::readVersion()
 				switch (m_protocolVersion) {
 				case 1U:
 					LogInfo("MMDVM protocol version: %u, description: %.*s", m_protocolVersion, m_length - 4U, m_buffer + 4U);
+					m_capabilities1 = CAP1_DSTAR | CAP1_DMR | CAP1_YSF | CAP1_P25 | CAP1_NXDN | CAP1_FM;
+					m_capabilities2 = CAP2_POCSAG;
 					return true;
 
 				case 2U:
@@ -1974,25 +2038,27 @@ bool CModem::readVersion()
 						LogInfo("CPU: Unknown type: %u", m_buffer[6U]);
 						break;
 					}
+					m_capabilities1 = m_buffer[4U];
+					m_capabilities2 = m_buffer[5U];
 					char modeText[100U];
 					::strcpy(modeText, "Modes:");
-					if ((m_buffer[4U] & 0x01U) == 0x01U)
+					if (hasDStar())
 						::strcat(modeText, " D-Star");
-					if ((m_buffer[4U] & 0x02U) == 0x02U)
+					if (hasDMR())
 						::strcat(modeText, " DMR");
-					if ((m_buffer[4U] & 0x04U) == 0x04U)
+					if (hasYSF())
 						::strcat(modeText, " YSF");
-					if ((m_buffer[4U] & 0x08U) == 0x08U)
+					if (hasP25())
 						::strcat(modeText, " P25");
-					if ((m_buffer[4U] & 0x10U) == 0x10U)
+					if (hasNXDN())
 						::strcat(modeText, " NXDN");
-					if ((m_buffer[4U] & 0x20U) == 0x20U)
+					if (hasM17())
 						::strcat(modeText, " M17");
-					if ((m_buffer[4U] & 0x40U) == 0x40U)
+					if (hasFM())
 						::strcat(modeText, " FM");
-					if ((m_buffer[5U] & 0x01U) == 0x01U)
+					if (hasPOCSAG())
 						::strcat(modeText, " POCSAG");
-					if ((m_buffer[5U] & 0x02U) == 0x02U)
+					if (hasAX25())
 						::strcat(modeText, " AX.25");
 					LogInfo(modeText);
 					return true;
diff --git a/Modem.h b/Modem.h
index fe9dfb7..7b112db 100644
--- a/Modem.h
+++ b/Modem.h
@@ -64,6 +64,18 @@ public:
 
 	bool open();
 
+	bool hasDStar() const;
+	bool hasDMR() const;
+	bool hasYSF() const;
+	bool hasP25() const;
+	bool hasNXDN() const;
+	bool hasM17() const;
+	bool hasPOCSAG() const;
+	bool hasFM() const;
+	bool hasAX25() const;
+
+	unsigned int getVersion() const;
+
 	unsigned int readDStarData(unsigned char* data);
 	unsigned int readDMRData1(unsigned char* data);
 	unsigned int readDMRData2(unsigned char* data);
@@ -264,6 +276,8 @@ private:
 	unsigned int               m_fmExtAudioBoost;
 	float                      m_fmMaxDevLevel;
 	bool                       m_fmExtEnable;
+	unsigned char              m_capabilities1;
+	unsigned char              m_capabilities2;
 
 	bool readVersion();
 	bool readStatus();
diff --git a/Version.h b/Version.h
index 69f184a..a62e8cd 100644
--- a/Version.h
+++ b/Version.h
@@ -19,6 +19,6 @@
 #if !defined(VERSION_H)
 #define	VERSION_H
 
-const char* VERSION = "20210425";
+const char* VERSION = "20210508";
 
 #endif