Index: firmware/App/Services/AlarmMgmt.c
===================================================================
diff -u -r6cb2aa52c6701efe0788ee453da6449e29860927 -rdf41331377d5da437e853327019c17c58e3af775
--- firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision 6cb2aa52c6701efe0788ee453da6449e29860927)
+++ firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision df41331377d5da437e853327019c17c58e3af775)
@@ -37,6 +37,7 @@
 #define ALARM_STATUS_PUBLISH_INTERVAL           ( ALARM_LAMP_AND_AUDIO_CONTROL_INTERVAL_MS / TASK_GENERAL_INTERVAL )
 
 #define ALARM_SILENCE_EXPIRES_IN_SECS           (60)                                ///< Alarm silence expiration time in seconds.
+#define ALARM_SILENCE_REQUESTED                 1                                   ///< User cmd to request alarm silence (1=silence, 0=cancel silence).
 
 #define SUPERVISOR_ALARM_KEY                    0xD2C3B4A5                          ///< 32-bit key required for clear all alarms request.
 
@@ -422,6 +423,37 @@
 
 /*********************************************************************//**
  * @brief
+ * The signalAlarmSilence function handles an alarm silence request from
+ * the user.
+ * @details Inputs: none
+ * @details Outputs: alarm silence status updated
+ * @param cmd ID of user command (1=silence, 0=cancel silence)
+ * @return none
+ *************************************************************************/
+void signalAlarmSilence( U08 cmd )
+{
+    if ( ALARM_SILENCE_REQUESTED == cmd )
+    {
+        if ( FALSE == alarmStatus.alarmsSilenced )
+        {
+            alarmStatus.alarmsSilenced = TRUE;
+            alarmStatus.alarmsSilenceStart = getMSTimerCount();
+            alarmStatus.alarmsSilenceExpiresIn = ALARM_SILENCE_EXPIRES_IN_SECS;
+        }
+    }
+    else
+    {
+        if ( TRUE == alarmStatus.alarmsSilenced )
+        {
+            alarmStatus.alarmsSilenced = FALSE;
+            alarmStatus.alarmsSilenceStart = 0;
+            alarmStatus.alarmsSilenceExpiresIn = 0;
+        }
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The signalAlarmUserActionInitiated function clears all non-recoverable alarms
  * and initiates selected user action.
  * @details Inputs: none
Index: firmware/App/Services/AlarmMgmt.h
===================================================================
diff -u -r7325348a8b5fce9101d0f68d89c791d48e1a3575 -rdf41331377d5da437e853327019c17c58e3af775
--- firmware/App/Services/AlarmMgmt.h	(.../AlarmMgmt.h)	(revision 7325348a8b5fce9101d0f68d89c791d48e1a3575)
+++ firmware/App/Services/AlarmMgmt.h	(.../AlarmMgmt.h)	(revision df41331377d5da437e853327019c17c58e3af775)
@@ -246,6 +246,7 @@
 void clearAlarm( ALARM_ID_T alarm );
 void clearAlarmCondition( ALARM_ID_T alarm );
 void setAlarmUserActionEnabled( ALARM_USER_ACTION_T action, BOOL enabled );
+void signalAlarmSilence( U08 cmd );
 void signalAlarmUserActionInitiated( ALARM_USER_ACTION_T action );
 BOOL isAlarmActive( ALARM_ID_T alarm );
 ALARM_PRIORITY_T getCurrentAlarmStatePriority( void );
Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -rce3e0696642099164fa482c864509c67ce65579b -rdf41331377d5da437e853327019c17c58e3af775
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision ce3e0696642099164fa482c864509c67ce65579b)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision df41331377d5da437e853327019c17c58e3af775)
@@ -1179,8 +1179,8 @@
             handleDGReservoirData( message );
             break;
 
-        case MSG_ID_TESTER_LOGIN_REQUEST:
-            handleTesterLogInRequest( message );
+        case MSG_ID_USER_REQUEST_ALARM_SILENCE:
+            handleUIAlarmSilenceRequest( message );
             break;
 
         case MSG_ID_UI_NEW_TREATMENT_PARAMS:
@@ -1207,6 +1207,10 @@
             handleUFVolumeSetRequest( message );
             break;
 
+        case MSG_ID_TESTER_LOGIN_REQUEST:
+            handleTesterLogInRequest( message );
+            break;
+
         default:
             // TODO - unrecognized message ID received - ignore
             break;
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -rce3e0696642099164fa482c864509c67ce65579b -rdf41331377d5da437e853327019c17c58e3af775
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision ce3e0696642099164fa482c864509c67ce65579b)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision df41331377d5da437e853327019c17c58e3af775)
@@ -1318,6 +1318,32 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleUIAlarmSilenceRequest function handles an alarm silence request
+ * message.
+ * @details Inputs: none
+ * @details Outputs: alarm silence command is handled.
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleUIAlarmSilenceRequest( MESSAGE_T *message )
+{
+    if ( message->hdr.payloadLen == sizeof( U08 ) )
+    {
+        U08 *payloadPtr = message->payload;
+        U08 cmd;
+
+        memcpy( &cmd, payloadPtr, sizeof( U08 ) );
+
+        signalAlarmSilence( cmd );
+    }
+    else
+    {
+        sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, FALSE );
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleAlarmUserAction function handles a user alarm action event message.
  * @details Inputs: none
  * @details Outputs: selected action initiated.
@@ -1338,6 +1364,10 @@
             signalAlarmUserActionInitiated( (ALARM_USER_ACTION_T)action );
         }
     }
+    else
+    {
+        sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, FALSE );
+    }
 }
 
 /*********************************************************************//**
Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -rce3e0696642099164fa482c864509c67ce65579b -rdf41331377d5da437e853327019c17c58e3af775
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision ce3e0696642099164fa482c864509c67ce65579b)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision df41331377d5da437e853327019c17c58e3af775)
@@ -66,6 +66,9 @@
 // MSG_ID_ALARM_CLEARED
 void handleAlarmCleared( MESSAGE_T *message );
 
+// MSG_ID_USER_REQUEST_ALARM_SILENCE
+void handleUIAlarmSilenceRequest( MESSAGE_T *message );
+
 // MSG_ID_ALARM_CONDITION_CLEARED
 void handleAlarmUserAction( MESSAGE_T *message );