diff --git a/Conf.cpp b/Conf.cpp
index fc0c4c0..ee4034b 100644
--- a/Conf.cpp
+++ b/Conf.cpp
@@ -163,12 +163,14 @@ m_p25NAC(0x293U),
 m_p25SelfOnly(false),
 m_p25OverrideUID(false),
 m_p25RemoteGateway(false),
+m_p25TXHang(5U),
 m_p25ModeHang(10U),
 m_nxdnEnabled(false),
 m_nxdnId(0U),
 m_nxdnRAN(1U),
 m_nxdnSelfOnly(false),
 m_nxdnRemoteGateway(false),
+m_nxdnTXHang(5U),
 m_nxdnModeHang(10U),
 m_pocsagEnabled(false),
 m_pocsagFrequency(0U),
@@ -674,6 +676,8 @@ bool CConf::read()
 			m_p25SelfOnly = ::atoi(value) == 1;
 		else if (::strcmp(key, "RemoteGateway") == 0)
 			m_p25RemoteGateway = ::atoi(value) == 1;
+		else if (::strcmp(key, "TXHang") == 0)
+			m_p25TXHang = (unsigned int)::atoi(value);
 		else if (::strcmp(key, "ModeHang") == 0)
 			m_p25ModeHang = (unsigned int)::atoi(value);
 	} else if (section == SECTION_NXDN) {
@@ -687,6 +691,8 @@ bool CConf::read()
 			m_nxdnSelfOnly = ::atoi(value) == 1;
 		else if (::strcmp(key, "RemoteGateway") == 0)
 			m_nxdnRemoteGateway = ::atoi(value) == 1;
+		else if (::strcmp(key, "TXHang") == 0)
+			m_nxdnTXHang = (unsigned int)::atoi(value);
 		else if (::strcmp(key, "ModeHang") == 0)
 			m_nxdnModeHang = (unsigned int)::atoi(value);
 	} else if (section == SECTION_POCSAG) {
@@ -1461,6 +1467,11 @@ bool CConf::getP25RemoteGateway() const
 	return m_p25RemoteGateway;
 }
 
+unsigned int CConf::getP25TXHang() const
+{
+	return m_p25TXHang;
+}
+
 unsigned int CConf::getP25ModeHang() const
 {
 	return m_p25ModeHang;
@@ -1491,6 +1502,11 @@ bool CConf::getNXDNRemoteGateway() const
 	return m_nxdnRemoteGateway;
 }
 
+unsigned int CConf::getNXDNTXHang() const
+{
+	return m_nxdnTXHang;
+}
+
 unsigned int CConf::getNXDNModeHang() const
 {
 	return m_nxdnModeHang;
diff --git a/Conf.h b/Conf.h
index 51f7898..40e81a0 100644
--- a/Conf.h
+++ b/Conf.h
@@ -155,6 +155,7 @@ public:
   bool         getP25SelfOnly() const;
   bool         getP25OverrideUID() const;
   bool         getP25RemoteGateway() const;
+  unsigned int getP25TXHang() const;
   unsigned int getP25ModeHang() const;
 
   // The NXDN section
@@ -163,6 +164,7 @@ public:
   unsigned int getNXDNRAN() const;
   bool         getNXDNSelfOnly() const;
   bool         getNXDNRemoteGateway() const;
+  unsigned int getNXDNTXHang() const;
   unsigned int getNXDNModeHang() const;
 
   // The POCSAG section
@@ -426,6 +428,7 @@ private:
   bool         m_p25SelfOnly;
   bool         m_p25OverrideUID;
   bool         m_p25RemoteGateway;
+  unsigned int m_p25TXHang;
   unsigned int m_p25ModeHang;
 
   bool         m_nxdnEnabled;
@@ -433,6 +436,7 @@ private:
   unsigned int m_nxdnRAN;
   bool         m_nxdnSelfOnly;
   bool         m_nxdnRemoteGateway;
+  unsigned int m_nxdnTXHang;
   unsigned int m_nxdnModeHang;
 
   bool         m_pocsagEnabled;
diff --git a/MMDVM.ini b/MMDVM.ini
index 8a89cd5..12f2b73 100644
--- a/MMDVM.ini
+++ b/MMDVM.ini
@@ -126,6 +126,7 @@ NAC=293
 SelfOnly=0
 OverrideUIDCheck=0
 RemoteGateway=0
+TXHang=5
 # ModeHang=10
 
 [NXDN]
@@ -133,6 +134,7 @@ Enable=1
 RAN=1
 SelfOnly=0
 RemoteGateway=0
+TXHang=5
 # ModeHang=10
 
 [POCSAG]
diff --git a/MMDVMHost.cpp b/MMDVMHost.cpp
index 1c32ad6..f4967f3 100644
--- a/MMDVMHost.cpp
+++ b/MMDVMHost.cpp
@@ -550,12 +550,13 @@ int CMMDVMHost::run()
 	}
 
 	if (m_p25Enabled) {
-		unsigned int id    = m_conf.getP25Id();
-		unsigned int nac   = m_conf.getP25NAC();
-		bool uidOverride   = m_conf.getP25OverrideUID();
-		bool selfOnly      = m_conf.getP25SelfOnly();
-		bool remoteGateway = m_conf.getP25RemoteGateway();
-		m_p25RFModeHang    = m_conf.getP25ModeHang();
+		unsigned int id     = m_conf.getP25Id();
+		unsigned int nac    = m_conf.getP25NAC();
+		unsigned int txHang = m_conf.getP25TXHang();
+		bool uidOverride    = m_conf.getP25OverrideUID();
+		bool selfOnly       = m_conf.getP25SelfOnly();
+		bool remoteGateway  = m_conf.getP25RemoteGateway();
+		m_p25RFModeHang     = m_conf.getP25ModeHang();
 
 		LogInfo("P25 RF Parameters");
 		LogInfo("    Id: %u", id);
@@ -563,6 +564,7 @@ int CMMDVMHost::run()
 		LogInfo("    UID Override: %s", uidOverride ? "yes" : "no");
 		LogInfo("    Self Only: %s", selfOnly ? "yes" : "no");
 		LogInfo("    Remote Gateway: %s", remoteGateway ? "yes" : "no");
+		LogInfo("    TX Hang: %us", txHang);
 		LogInfo("    Mode Hang: %us", m_p25RFModeHang);
 
 		m_p25 = new CP25Control(nac, id, selfOnly, uidOverride, m_p25Network, m_display, m_timeout, m_duplex, m_dmrLookup, remoteGateway, rssi);
@@ -580,17 +582,19 @@ int CMMDVMHost::run()
 		m_nxdnLookup = new CNXDNLookup(lookupFile, reloadTime);
 		m_nxdnLookup->read();
 
-		unsigned int id    = m_conf.getNXDNId();
-		unsigned int ran   = m_conf.getNXDNRAN();
-		bool selfOnly      = m_conf.getNXDNSelfOnly();
-		bool remoteGateway = m_conf.getNXDNRemoteGateway();
-		m_nxdnRFModeHang   = m_conf.getNXDNModeHang();
+		unsigned int id     = m_conf.getNXDNId();
+		unsigned int ran    = m_conf.getNXDNRAN();
+		bool selfOnly       = m_conf.getNXDNSelfOnly();
+		bool remoteGateway  = m_conf.getNXDNRemoteGateway();
+		unsigned int txHang = m_conf.getNXDNTXHang();
+		m_nxdnRFModeHang    = m_conf.getNXDNModeHang();
 
 		LogInfo("NXDN RF Parameters");
 		LogInfo("    Id: %u", id);
 		LogInfo("    RAN: %u", ran);
 		LogInfo("    Self Only: %s", selfOnly ? "yes" : "no");
 		LogInfo("    Remote Gateway: %s", remoteGateway ? "yes" : "no");
+		LogInfo("    TX Hang: %us", txHang);
 		LogInfo("    Mode Hang: %us", m_nxdnRFModeHang);
 
 		m_nxdn = new CNXDNControl(ran, id, selfOnly, m_nxdnNetwork, m_display, m_timeout, m_duplex, remoteGateway, m_nxdnLookup, rssi);
@@ -1164,7 +1168,9 @@ bool CMMDVMHost::createModem()
 	bool debug                   = m_conf.getModemDebug();
 	unsigned int colorCode       = m_conf.getDMRColorCode();
 	bool lowDeviation            = m_conf.getFusionLowDeviation();
-	unsigned int txHang          = m_conf.getFusionTXHang();
+	unsigned int ysfTXHang       = m_conf.getFusionTXHang();
+	unsigned int p25TXHang       = m_conf.getP25TXHang();
+	unsigned int nxdnTXHang      = m_conf.getNXDNTXHang();
 	unsigned int rxFrequency     = m_conf.getRXFrequency();
 	unsigned int txFrequency     = m_conf.getTXFrequency();
 	unsigned int pocsagFrequency = m_conf.getPOCSAGFrequency();
@@ -1206,7 +1212,9 @@ bool CMMDVMHost::createModem()
 	m_modem->setLevels(rxLevel, cwIdTXLevel, dstarTXLevel, dmrTXLevel, ysfTXLevel, p25TXLevel, nxdnTXLevel, pocsagTXLevel, fmTXLevel);
 	m_modem->setRFParams(rxFrequency, rxOffset, txFrequency, txOffset, txDCOffset, rxDCOffset, rfLevel, pocsagFrequency);
 	m_modem->setDMRParams(colorCode);
-	m_modem->setYSFParams(lowDeviation, txHang);
+	m_modem->setYSFParams(lowDeviation, ysfTXHang);
+	m_modem->setP25Params(p25TXHang);
+	m_modem->setNXDNParams(nxdnTXHang);
 
 	if (m_fmEnabled) {
 		std::string  callsign           = m_conf.getFMCallsign();
diff --git a/Modem.cpp b/Modem.cpp
index d913c6a..93319be 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -104,6 +104,8 @@ m_port(port),
 m_dmrColorCode(0U),
 m_ysfLoDev(false),
 m_ysfTXHang(4U),
+m_p25TXHang(5U),
+m_nxdnTXHang(5U),
 m_duplex(duplex),
 m_rxInvert(rxInvert),
 m_txInvert(txInvert),
@@ -265,6 +267,16 @@ void CModem::setYSFParams(bool loDev, unsigned int txHang)
 	m_ysfTXHang = txHang;
 }
 
+void CModem::setP25Params(unsigned int txHang)
+{
+	m_p25TXHang = txHang;
+}
+
+void CModem::setNXDNParams(unsigned int txHang)
+{
+	m_nxdnTXHang = txHang;
+}
+
 void CModem::setTransparentDataParams(unsigned int sendFrameType)
 {
     m_sendTransparentDataFrameType = sendFrameType;
@@ -1507,7 +1519,7 @@ bool CModem::setConfig()
 
 	buffer[0U] = MMDVM_FRAME_START;
 
-	buffer[1U] = 22U;
+	buffer[1U] = 24U;
 
 	buffer[2U] = MMDVM_SET_CONFIG;
 
@@ -1571,10 +1583,14 @@ bool CModem::setConfig()
 
 	buffer[21U] = (unsigned char)(m_fmTXLevel * 2.55F + 0.5F);
 
-	// CUtils::dump(1U, "Written", buffer, 22U);
+	buffer[22U] = (unsigned char)m_p25TXHang;
 
-	int ret = m_serial->write(buffer, 22U);
-	if (ret != 22)
+	buffer[23U] = (unsigned char)m_nxdnTXHang;
+
+	// CUtils::dump(1U, "Written", buffer, 24U);
+
+	int ret = m_serial->write(buffer, 24U);
+	if (ret != 24)
 		return false;
 
 	unsigned int count = 0U;
diff --git a/Modem.h b/Modem.h
index 495718f..069fe46 100644
--- a/Modem.h
+++ b/Modem.h
@@ -43,6 +43,8 @@ public:
 	virtual void setLevels(float rxLevel, float cwIdTXLevel, float dstarTXLevel, float dmrTXLevel, float ysfTXLevel, float p25TXLevel, float nxdnTXLevel, float pocsagLevel, float fmTXLevel);
 	virtual void setDMRParams(unsigned int colorCode);
 	virtual void setYSFParams(bool loDev, unsigned int txHang);
+	virtual void setP25Params(unsigned int txHang);
+	virtual void setNXDNParams(unsigned int txHang);
 	virtual void setTransparentDataParams(unsigned int sendFrameType);
 
 	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, bool callsignAtLatch);
@@ -118,6 +120,8 @@ private:
 	unsigned int               m_dmrColorCode;
 	bool                       m_ysfLoDev;
 	unsigned int               m_ysfTXHang;
+	unsigned int               m_p25TXHang;
+	unsigned int               m_nxdnTXHang;
 	bool                       m_duplex;
 	bool                       m_rxInvert;
 	bool                       m_txInvert;