diff --git a/src/main/java/altk/comm/engine/Broadcast.java b/src/main/java/altk/comm/engine/Broadcast.java
index 02d4c40..9189034 100644
--- a/src/main/java/altk/comm/engine/Broadcast.java
+++ b/src/main/java/altk/comm/engine/Broadcast.java
@@ -22,7 +22,7 @@ import javax.servlet.http.HttpServletResponse;
 import org.apache.log4j.Logger;
 import org.json.simple.JSONObject;
 
-import altk.comm.engine.Job.JobStatus;
+import altk.comm.engine.Job.CommJobStatus;
 import altk.comm.engine.exception.BroadcastError;
 import altk.comm.engine.exception.BroadcastException;
 import altk.comm.engine.exception.EngineException;
@@ -1271,7 +1271,7 @@ public abstract class Broadcast
      */
     public void postJobStatus(Job job)
     {
-        if (job.jobStatus == JobStatus.SUCCESS) successCount.incrementAndGet();
+        if (job.jobStatus == CommJobStatus.SUCCESS) successCount.incrementAndGet();
         if (postback != null)
         {
            JobReport report = mkJobReport();
diff --git a/src/main/java/altk/comm/engine/Job.java b/src/main/java/altk/comm/engine/Job.java
index 64611b1..4cd99e7 100644
--- a/src/main/java/altk/comm/engine/Job.java
+++ b/src/main/java/altk/comm/engine/Job.java
@@ -5,60 +5,40 @@ package altk.comm.engine;
  * @author Yuk-Ming
  *
  */
+
 public class Job
 {
-    /**
-     * Because enum has no inheritance, JobStatus is the union of
-     * all possible job status from all backend engines built on CommEngine.
-     */
-    static public enum JobStatus
-    {
-        // TODO: Some of them, like CANCELED and EXPIRED, should not be used, and should be cleaned out.
-        TRYING(false),        // VoiceEngine
-        GO_NEXT_PHONE(false), // VoiceEngine
-        //TRUNK_ERROR(false),
-        LONG_DURATION(true),  // VoiceEngine
-        SUCCESS(true),
-        NO_MORE_RETRY(true),  // VoiceEngine
-        ADDRESS_ERROR(true),  // All
-        SERVICE_PROVIDER_PROTOCOL_ERROR(true),  // SMS
-        SERVICE_PROVIDER_GENERATED_ERROR(true), // SMS
-        SERVICE_PROVIDER_HTTP_ERROR(true),      // SMS
-        SERVICE_PROVIDER_CONNECT_ERROR(true),   // SMS
-        FORBIDDEN(true),                        // SMS - HTTP 403
-        SPAM(true),                             // SMS
-        SERVICE_PROVIDER_OTHER_ERROR(true),     // Email
-        CANCELED(true),       // Voice - is it really?
-        EXPIRED(true),        // Voice - is it really?
-        MESSAGE_ERROR(true),  // Email, SMS
-        MSG_TOO_LONG(true),   // SMS
-        NOT_FOUND(true),                // SMS
-        INVALID_MEDIA_TYPE(true),       // MMS
-        SERVICE_ACCESS_BLOCKED(true),  // SMS
-        PLATFORM_ERROR(true),          // SMS
-        FAILED(true),                  // SMS
-        UNKNOWN_ERROR(true),           // SMS
-        NOT_AUTHORIZED(true),          // SMS
-        BAD_REQUEST(true),             // SMS
-        THROTTLE_LIMIT_REACHED(true),  // SMS
-        UNPROCESSABLE_ENTITY(true),      // SMS
-        PAYMENT_REQUIRED(true) ,
-        ABORT(true), 
-        ;
-        
-        private boolean isTerminal;
-        
-        private JobStatus(boolean isTerminal)
-        {
-            this.isTerminal = isTerminal;
-        }
-        
-        public boolean isTerminal()
-        {
-            return isTerminal;
-        }
+	/**
+	 * Named but empty interface designed for the purpose of extending a specific enum.
+	 */
+	public interface JobStatus
+	{
+	}
 
-    }
+	/**
+	 * Base JobStatus values common to all CommEngine's.
+	 */
+	static public enum CommJobStatus implements JobStatus
+	{
+	    SUCCESS,
+	    ADDRESS_ERROR,
+	    CANCELED, 
+	    EXPIRED,
+	    SERVICE_PROVIDER_PROTOCOL_ERROR,
+	    SERVICE_PROVIDER_CONNECT_ERROR,
+	    SERVICE_PROVIDER_HTTP_ERROR,
+	    SERVICE_PROVIDER_GENERATED_ERROR,
+	    SERVICE_PROVIDER_OTHER_ERROR,
+	    FORBIDDEN,
+	    UNKNOWN_ERROR, 
+	    NOT_AUTHORIZED,
+	    BAD_REQUEST, 
+	    ABORT,
+	    PLATFORM_ERROR,
+	    FAILED,
+	    NOT_FOUND,
+	    PAYMENT_REQUIRED;
+	}
 
     public Recipient recipient;