diff --git a/src/main/java/altk/comm/engine/Broadcast.java b/src/main/java/altk/comm/engine/Broadcast.java
index 19cf17f..62b835c 100644
--- a/src/main/java/altk/comm/engine/Broadcast.java
+++ b/src/main/java/altk/comm/engine/Broadcast.java
@@ -10,6 +10,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Queue;
+import java.util.Vector;
 import java.util.concurrent.Executors;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.ScheduledExecutorService;
@@ -20,7 +21,6 @@ import java.util.concurrent.atomic.AtomicInteger;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.apache.log4j.Category;
 import org.apache.log4j.Logger;
 import org.json.simple.JSONObject;
 
@@ -41,6 +41,7 @@ import altk.comm.engine.exception.PlatformException;
  */
 public abstract class Broadcast
 {
+	protected static final String ACTION_BY_CLOCK = "clock";
 	private static final int SCHEDULER_THREAD_POOL_SIZE = 5;
     private static final String ACTIVITY_RECORD_ID_PARAM_NAME_DEFAULT = "activity_record_id";
     private static final long SLEEP_BETWEEN_JOBS_DEFAULT = 0;
@@ -52,10 +53,10 @@ public abstract class Broadcast
     public final String broadcastType;
 	private String broadcastId;
 	
-    private BroadcastState state = BroadcastState.ACCEPTED;
+    protected BroadcastState state = BroadcastState.ACCEPTED;
     private Object stateSemaphore = new Object();
 
-    String reason;
+    protected String reason;
     String stateErrorText;
 	public CommEngine commEngine;
     public final long receiveTime;
@@ -699,11 +700,6 @@ public abstract class Broadcast
 	        }
 	        else
 	        {
-	            // log illegal state transition with call trace
-	            Exception e = new Exception(String.format("Broadast %s ignored illegal transition from %s to %s", broadcastId, prev, newState));
-	            myLogger.error(e.getMessage());
-	            myLogger.debug("This exception is not thrown -- only for debugging information", e);
-	            
 	            return new StateChangeResult(StateChangeStatus.FORBIDDEN, prev, null);
 	        }
         }
@@ -1017,29 +1013,43 @@ public abstract class Broadcast
 	protected void resume(String reason, PrintWriter out)
 	{
 		if (state == BroadcastState.ACCEPTED || state.isFinal) return;
-		if (reason == "clock" && state  == BroadcastState.PAUSED && this.reason != "clock") return;
-		if (!withinOperatingHours())
-		{
-			if (out != null) out.write("Cannot resume outside operating hours");
-			return;
+		String actionStatus = resume(reason);
+		if (out != null && actionStatus != null) out.write(actionStatus);
+	}
+	
+	protected String resume(String reason) {
+		if (reason == ACTION_BY_CLOCK) {
+			boolean inAcceptqble = false;
+			for (String acceptable  : getPauseModesResumableByClock()) {
+				if (this.reason.equalsIgnoreCase(acceptable)) inAcceptqble = true;
+			}
+			if (!inAcceptqble) return null;
 		}
+		if (!withinOperatingHours()) return "Cannot resume outside operating hours";
+		
 	    synchronized (resumeFlag)
 	    {
 			StateChangeResult result = setState(BroadcastState.RUNNING, reason, null);
 			switch (result.stateChangeStatus)
 			{
 			case FORBIDDEN:
-				if (out != null) out.write("resume not allowed");
-				break;
+				return "resume not allowed";
 			case SUCCESS:
-				if (out != null) out.write("Broadcast resumed");
 				resumeFlag.notifyAll();
-				break;
+				return "Broadcast resumed";
 			default:
-				break;
+				return null;	
 			}
 	    }
 	}
+	
+	/** derived class may override by adding more modes */
+	protected List<String> getPauseModesResumableByClock() {
+		Vector<String> modes = new Vector<String>();
+		modes.add(ACTION_BY_CLOCK);
+		return modes;
+	}
+	
 	/**
 	 * Derived class may make its own Implementation of JobReport
 	 * @return
@@ -1075,7 +1085,7 @@ public abstract class Broadcast
 			}
 			else
 			{
-				setState(BroadcastState.PAUSED, "clock", null);
+				setState(BroadcastState.PAUSED, ACTION_BY_CLOCK, null);
 			}
 	
 	        // Start the dispatcher threads
@@ -1473,10 +1483,8 @@ public abstract class Broadcast
 	 */
 	void enforceOperationHours() {
 		if (state == BroadcastState.ABORTED) return;
-		if (withinOperatingHours()) {
-//			resume("clock", null);
-		} else {
-			pause("clock", null);
+		if (!withinOperatingHours()) {
+			pause(ACTION_BY_CLOCK, null);
 		}
 	}