diff --git a/src/dmr/Slot.cpp b/src/dmr/Slot.cpp
index a6601920..69f36c6e 100644
--- a/src/dmr/Slot.cpp
+++ b/src/dmr/Slot.cpp
@@ -133,6 +133,7 @@ Slot::Slot(uint32_t slotNo, uint32_t timeout, uint32_t tgHang, uint32_t queueSiz
     m_networkWatchdog(1000U, 0U, 1500U),
     m_rfTimeoutTimer(1000U, timeout),
     m_rfTGHang(1000U, tgHang),
+    m_rfLossWatchdog(1000U, 0U, 1500U),
     m_netTimeoutTimer(1000U, timeout),
     m_netTGHang(1000U, 2U),
     m_packetTimer(1000U, 0U, 50U),
@@ -212,6 +213,7 @@ bool Slot::processFrame(uint8_t *data, uint32_t len)
             // increment the frame loss count by one for audio or data; otherwise drop
             // packets
             if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+                m_rfLossWatchdog.start();
                 ++m_frameLossCnt;
             }
             else {
@@ -228,6 +230,12 @@ bool Slot::processFrame(uint8_t *data, uint32_t len)
         }
     }
 
+    if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+        if (m_rfLossWatchdog.isRunning()) {
+            m_rfLossWatchdog.start();
+        }
+    }
+
     // Have we got RSSI bytes on the end?
     if (len == (DMR_FRAME_LENGTH_BYTES + 4U)) {
         uint16_t raw = 0U;
@@ -495,7 +503,10 @@ void Slot::clock()
         }
     }
 
+    // handle timeouts and hang timers
     m_rfTimeoutTimer.clock(ms);
+    m_netTimeoutTimer.clock(ms);
+
     if (m_rfTimeoutTimer.isRunning() && m_rfTimeoutTimer.hasExpired()) {
         if (!m_rfTimeout) {
             LogMessage(LOG_RF, "DMR Slot %u, user has timed out", m_slotNo);
@@ -503,11 +514,15 @@ void Slot::clock()
         }
     }
 
-    m_netTimeoutTimer.clock(ms);
-    if (m_netTimeoutTimer.isRunning() && m_netTimeoutTimer.hasExpired()) {
-        if (!m_netTimeout) {
-            LogMessage(LOG_NET, "DMR Slot %u, user has timed out", m_slotNo);
-            m_netTimeout = true;
+    if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+        if (m_rfLossWatchdog.isRunning()) {
+            m_rfLossWatchdog.clock(ms);
+
+            if (m_rfLossWatchdog.hasExpired()) {
+                m_rfLossWatchdog.stop();
+
+                processFrameLoss();
+            }
         }
     }
 
@@ -529,6 +544,13 @@ void Slot::clock()
         }
     }
 
+    if (m_netTimeoutTimer.isRunning() && m_netTimeoutTimer.hasExpired()) {
+        if (!m_netTimeout) {
+            LogMessage(LOG_NET, "DMR Slot %u, user has timed out", m_slotNo);
+            m_netTimeout = true;
+        }
+    }
+
     if (m_authoritative) {
         if (m_netTGHang.isRunning()) {
             m_netTGHang.clock(ms);
@@ -1008,6 +1030,8 @@ void Slot::processFrameLoss()
             }
         }
 
+        clearTSCCActivated();
+
         if (!m_tscc->m_enableTSCC) {
             notifyCC_ReleaseGrant(m_rfLC->getDstId());
         }
diff --git a/src/dmr/Slot.h b/src/dmr/Slot.h
index aaffb3f5..05f2603a 100644
--- a/src/dmr/Slot.h
+++ b/src/dmr/Slot.h
@@ -175,6 +175,7 @@ namespace dmr
         Timer m_networkWatchdog;
         Timer m_rfTimeoutTimer;
         Timer m_rfTGHang;
+        Timer m_rfLossWatchdog;
         Timer m_netTimeoutTimer;
         Timer m_netTGHang;
         Timer m_packetTimer;
diff --git a/src/nxdn/Control.cpp b/src/nxdn/Control.cpp
index 596eed98..d88c2329 100644
--- a/src/nxdn/Control.cpp
+++ b/src/nxdn/Control.cpp
@@ -130,6 +130,7 @@ Control::Control(bool authoritative, uint32_t ran, uint32_t callHang, uint32_t q
     m_ccHalted(false),
     m_rfTimeout(1000U, timeout),
     m_rfTGHang(1000U, tgHang),
+    m_rfLossWatchdog(1000U, 0U, 1500U),
     m_netTimeout(1000U, timeout),
     m_netTGHang(1000U, 2U),
     m_networkWatchdog(1000U, 0U, 1500U),
@@ -394,6 +395,7 @@ bool Control::processFrame(uint8_t* data, uint32_t len)
             // increment the frame loss count by one for audio or data; otherwise drop
             // packets
             if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+                m_rfLossWatchdog.start();
                 ++m_frameLossCnt;
             }
             else {
@@ -408,6 +410,12 @@ bool Control::processFrame(uint8_t* data, uint32_t len)
         }
     }
 
+    if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+        if (m_rfLossWatchdog.isRunning()) {
+            m_rfLossWatchdog.start();
+        }
+    }
+
 	// have we got RSSI bytes on the end?
     if (len == (NXDN_FRAME_LENGTH_BYTES + 4U)) {
         uint16_t raw = 0U;
@@ -621,6 +629,18 @@ void Control::clock(uint32_t ms)
             }
         }
     }
+    
+    if (m_rfState == RS_RF_AUDIO || m_rfState == RS_RF_DATA) {
+        if (m_rfLossWatchdog.isRunning()) {
+            m_rfLossWatchdog.clock(ms);
+
+            if (m_rfLossWatchdog.hasExpired()) {
+                m_rfLossWatchdog.stop();
+
+                processFrameLoss();
+            }
+        }
+    }
 
     if (m_authoritative) {
         if (m_netTGHang.isRunning()) {
diff --git a/src/nxdn/Control.h b/src/nxdn/Control.h
index 8b4e13d9..c2bbb027 100644
--- a/src/nxdn/Control.h
+++ b/src/nxdn/Control.h
@@ -191,6 +191,7 @@ namespace nxdn
 
         Timer m_rfTimeout;
         Timer m_rfTGHang;
+        Timer m_rfLossWatchdog;
         Timer m_netTimeout;
         Timer m_netTGHang;
         Timer m_networkWatchdog;