diff --git a/DMRSlot.cpp b/DMRSlot.cpp
index f4d29b1..9a6d7ec 100644
--- a/DMRSlot.cpp
+++ b/DMRSlot.cpp
@@ -137,6 +137,9 @@ bool CDMRSlot::writeModem(unsigned char *data, unsigned int len)
 {
 	assert(data != NULL);
 
+	if (!m_enabled)
+		return false;
+
 	if (data[0U] == TAG_LOST && m_rfState == RS_RF_AUDIO) {
 		if (m_rssi != 0U)
 			LogMessage("DMR Slot %u, RF voice transmission lost, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm", m_slotNo, float(m_rfFrames) / 16.667F, float(m_rfErrs * 100U) / float(m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
@@ -991,6 +994,9 @@ void CDMRSlot::writeEndNet(bool writeEnd)
 
 void CDMRSlot::writeNetwork(const CDMRData& dmrData)
 {
+	if (!m_enabled)
+		return;
+
 	if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
 		return;
 
diff --git a/DStarControl.cpp b/DStarControl.cpp
index f0394c7..9181e1d 100644
--- a/DStarControl.cpp
+++ b/DStarControl.cpp
@@ -121,6 +121,9 @@ bool CDStarControl::writeModem(unsigned char *data, unsigned int len)
 {
 	assert(data != NULL);
 
+	if (!m_enabled)
+		return false;
+
 	unsigned char type = data[0U];
 
 	if (type == TAG_LOST && (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA)) {
@@ -622,6 +625,9 @@ void CDStarControl::writeNetwork()
 	if (length == 0U)
 		return;
 
+	if (!m_enabled)
+		return;
+
 	if ((m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) && m_netState == RS_NET_IDLE)
 		return;
 
diff --git a/NXDNControl.cpp b/NXDNControl.cpp
index 5334cb7..495724f 100644
--- a/NXDNControl.cpp
+++ b/NXDNControl.cpp
@@ -87,6 +87,9 @@ bool CNXDNControl::writeModem(unsigned char *data, unsigned int len)
 {
 	assert(data != NULL);
 
+	if (!m_enabled)
+		return false;
+
 	unsigned char type = data[0U];
 
 	if (type == TAG_LOST && m_rfState == RS_RF_AUDIO) {
@@ -727,6 +730,9 @@ void CNXDNControl::writeNetwork()
 	if (!exists)
 		return;
 
+	if (!m_enabled)
+		return;
+
 	if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
 		return;
 
diff --git a/P25Control.cpp b/P25Control.cpp
index 1d90b2c..a21602e 100644
--- a/P25Control.cpp
+++ b/P25Control.cpp
@@ -116,6 +116,9 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
 {
 	assert(data != NULL);
 
+	if (!m_enabled)
+		return false;
+
 	bool sync = data[1U] == 0x01U;
 
 	if (data[0U] == TAG_LOST && m_rfState == RS_RF_AUDIO) {
@@ -604,6 +607,9 @@ void CP25Control::writeNetwork()
 	if (length == 0U)
 		return;
 
+	if (!m_enabled)
+		return;
+
 	if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
 		return;
 
diff --git a/POCSAGControl.cpp b/POCSAGControl.cpp
index 85728cb..ff7ec2f 100644
--- a/POCSAGControl.cpp
+++ b/POCSAGControl.cpp
@@ -106,6 +106,9 @@ bool CPOCSAGControl::processData()
 	if (length == 0U)
 		return false;
 
+	if (!m_enabled)
+		return false;
+
 	m_ric = 0U;
 	m_ric |= (data[0U] << 16) & 0x00FF0000U;
 	m_ric |= (data[1U] << 8)  & 0x0000FF00U;
diff --git a/YSFControl.cpp b/YSFControl.cpp
index f098d8a..21d2294 100644
--- a/YSFControl.cpp
+++ b/YSFControl.cpp
@@ -110,6 +110,9 @@ bool CYSFControl::writeModem(unsigned char *data, unsigned int len)
 {
 	assert(data != NULL);
 
+	if (!m_enabled)
+		return false;
+
 	unsigned char type = data[0U];
 
 	if (type == TAG_LOST && m_rfState == RS_RF_AUDIO) {
@@ -1032,6 +1035,9 @@ void CYSFControl::writeNetwork()
 	if (length == 0U)
 		return;
 
+	if (!m_enabled)
+		return;
+
 	if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
 		return;