diff --git a/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzsp.java b/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzsp.java
index 60f77402c..f63ff13b3 100644
--- a/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzsp.java
+++ b/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzsp.java
@@ -457,7 +457,13 @@ public ZigBeeStatus initialize() {
         stackConfigurer.setPolicy(stackPolicies);
         policies = stackConfigurer.getPolicy(stackPolicies.keySet());
         for (Entry<EzspPolicyId, Integer> policy : policies.entrySet()) {
-            EzspDecisionId decisionId = EzspDecisionId.getEzspDecisionId(policy.getValue());
+            EzspDecisionId decisionId = null;
+            try {
+                decisionId = EzspDecisionId.getEzspDecisionId(policy.getValue());
+            } catch (Exception e) {
+                // Eat me!
+                // This is only for logging.
+            }
             logger.debug("Policy state {} = {} [{}]", policy.getKey(), decisionId,
                     String.format("%02X", policy.getValue()));
         }
@@ -465,7 +471,14 @@ public ZigBeeStatus initialize() {
         EmberNcp ncp = getEmberNcp();
 
         // Get the current network parameters so that any configuration updates start from here
-        networkParameters = ncp.getNetworkParameters().getParameters();
+        EzspGetNetworkParametersResponse networkParametersResponse = ncp.getNetworkParameters();
+        if (networkParametersResponse == null) {
+            return ZigBeeStatus.COMMUNICATION_ERROR;
+        }
+        EmberNetworkParameters localNetworkParameters = networkParametersResponse.getParameters();
+        if (localNetworkParameters != null) {
+            networkParameters = localNetworkParameters;
+        }
         logger.debug("Ember initial network parameters are {}", networkParameters);
 
         ieeeAddress = ncp.getIeeeAddress();
@@ -473,6 +486,11 @@ public ZigBeeStatus initialize() {
 
         ncp.getNetworkParameters();
 
+        if (!frameHandler.isAlive()) {
+            logger.error("Ember frame handler is not alive after initialize!");
+            return ZigBeeStatus.COMMUNICATION_ERROR;
+        }
+
         isConfigured = true;
         logger.debug("EZSP Dongle: initialize done");
 
diff --git a/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzspTest.java b/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzspTest.java
index 01c4eb48d..bdc7ffc56 100644
--- a/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzspTest.java
+++ b/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeDongleEzspTest.java
@@ -728,4 +728,55 @@ public EmberNcp getEmberNcp() {
         assertNull(dongle.getTcLinkKey());
         assertNotNull(dongle.getZigBeeNetworkKey());
     }
+
+    @Test
+    public void initializeNoNetorkParameters() {
+        System.out.println("--- " + Thread.currentThread().getStackTrace()[1].getMethodName());
+        final EmberNcp ncp = Mockito.mock(EmberNcp.class);
+        final EzspVersionResponse version = Mockito.mock(EzspVersionResponse.class);
+        Mockito.when(version.getProtocolVersion()).thenReturn(4);
+
+        Mockito.when(ncp.getVersion()).thenReturn(version);
+
+        final ZigBeePort port = Mockito.mock(ZigBeePort.class);
+        Mockito.when(port.open()).thenReturn(true);
+
+        ZigBeeDongleEzsp dongle = new ZigBeeDongleEzsp(port) {
+            @Override
+            public EmberNcp getEmberNcp() {
+                return ncp;
+            }
+        };
+
+        final ZigBeeTransportReceive receiver = Mockito.mock(ZigBeeTransportReceive.class);
+
+        dongle.setZigBeeTransportReceive(receiver);
+        assertEquals(ZigBeeStatus.COMMUNICATION_ERROR, dongle.initialize());
+    }
+
+    @Test
+    public void initializeSuccess() {
+        System.out.println("--- " + Thread.currentThread().getStackTrace()[1].getMethodName());
+        final EmberNcp ncp = Mockito.mock(EmberNcp.class);
+        final EzspVersionResponse version = Mockito.mock(EzspVersionResponse.class);
+        Mockito.when(version.getProtocolVersion()).thenReturn(4);
+
+        Mockito.when(ncp.getVersion()).thenReturn(version);
+        Mockito.when(ncp.getNetworkParameters()).thenReturn(Mockito.mock(EzspGetNetworkParametersResponse.class));
+
+        final ZigBeePort port = Mockito.mock(ZigBeePort.class);
+        Mockito.when(port.open()).thenReturn(true);
+
+        ZigBeeDongleEzsp dongle = new ZigBeeDongleEzsp(port) {
+            @Override
+            public EmberNcp getEmberNcp() {
+                return ncp;
+            }
+        };
+
+        final ZigBeeTransportReceive receiver = Mockito.mock(ZigBeeTransportReceive.class);
+
+        dongle.setZigBeeTransportReceive(receiver);
+        assertEquals(ZigBeeStatus.SUCCESS, dongle.initialize());
+    }
 }
diff --git a/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeTransportTransmitTest.java b/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeTransportTransmitTest.java
index 15e8fd9f5..76dd2f65b 100644
--- a/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeTransportTransmitTest.java
+++ b/com.zsmartsystems.zigbee.dongle.ember/src/test/java/com/zsmartsystems/zigbee/dongle/ember/ZigBeeTransportTransmitTest.java
@@ -15,6 +15,7 @@
 import com.zsmartsystems.zigbee.TestUtilities;
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.command.EzspGetNetworkParametersResponse;
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.command.EzspGetParentChildParametersResponse;
+import com.zsmartsystems.zigbee.dongle.ember.ezsp.command.EzspVersionResponse;
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.structure.EmberCurrentSecurityState;
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.structure.EmberNetworkParameters;
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.structure.EmberNetworkStatus;
@@ -24,6 +25,7 @@
 import com.zsmartsystems.zigbee.dongle.ember.ezsp.structure.EzspStatus;
 import com.zsmartsystems.zigbee.dongle.ember.internal.EzspProtocolHandler;
 import com.zsmartsystems.zigbee.transport.ZigBeePort;
+import com.zsmartsystems.zigbee.transport.ZigBeeTransportReceive;
 import com.zsmartsystems.zigbee.transport.ZigBeeTransportTransmitAbstractTest;
 
 /**
@@ -52,6 +54,11 @@ public void initialiseTransport() throws Exception {
         Mockito.when(ncp.setRadioPower(ArgumentMatchers.anyInt())).thenReturn(EmberStatus.EMBER_SUCCESS);
         Mockito.when(ncp.getNwkAddress()).thenReturn(Integer.valueOf(0));
         Mockito.when(ncp.getIeeeAddress()).thenReturn(new IeeeAddress("1234567890ABCDEF"));
+        final EzspVersionResponse version = Mockito.mock(EzspVersionResponse.class);
+        Mockito.when(version.getProtocolVersion()).thenReturn(4);
+
+        Mockito.when(ncp.getVersion()).thenReturn(version);
+        Mockito.when(ncp.getNetworkParameters()).thenReturn(Mockito.mock(EzspGetNetworkParametersResponse.class));
 
         ZigBeePort port = Mockito.mock(ZigBeePort.class);
         Mockito.when(port.open()).thenReturn(Boolean.TRUE);
@@ -62,8 +69,13 @@ public EmberNcp getEmberNcp() {
                 return ncp;
             }
         };
+        EzspProtocolHandler frameHandler = Mockito.mock(EzspProtocolHandler.class);
+        Mockito.when(frameHandler.isAlive()).thenReturn(Boolean.TRUE);
+        TestUtilities.setField(ZigBeeDongleEzsp.class, dongle, "frameHandler", frameHandler);
+
+        final ZigBeeTransportReceive receiver = Mockito.mock(ZigBeeTransportReceive.class);
 
-        TestUtilities.setField(ZigBeeDongleEzsp.class, dongle, "frameHandler", Mockito.mock(EzspProtocolHandler.class));
+        dongle.setZigBeeTransportReceive(receiver);
 
         transport = dongle;
     }