Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r6dcc3d91f1f6095d6d3a722c2e3c2074d69be2a5 -r9f2e4e5933d2e418b75f91e3db5df69c71878d43
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 6dcc3d91f1f6095d6d3a722c2e3c2074d69be2a5)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 9f2e4e5933d2e418b75f91e3db5df69c71878d43)
@@ -502,6 +502,38 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The sendAlarmAudioVolumeSetResponse function constructs an alarm audio
+ * volume set request response to the UI and queues the msg for transmit on the
+ * appropriate CAN channel.
+ * @details Inputs: none
+ * @details Outputs: Alarm audio volume set.
+ * @param accepted flag indicating whether request was accepted
+ * @param rejReason rejection reason code
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendAlarmAudioVolumeSetResponse( U32 accepted, U32 rejReason )
+{
+    BOOL result;
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
+
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_HD_ALARM_AUDIO_VOLUME_SET_RESPONSE;
+    msg.hdr.payloadLen = sizeof( U32 ) * 2;
+
+    memcpy( payloadPtr, &accepted, sizeof( U32 ) );
+    payloadPtr += sizeof( U32 );
+    memcpy( payloadPtr, &rejReason, sizeof( U32 ) );
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
+
+    return result;
+}
+
 /*********************************************************************//**
  * @brief
  * The sendTreatmentParamsRangesToUI function constructs a treatment parameter
@@ -1412,6 +1444,34 @@
     result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_NOT_REQUIRED );
 
     return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The broadcastVoltagesData function constructs a monitored voltages data msg to
+ * be broadcast and queues the msg for transmit on the appropriate CAN channel.
+ * @details Inputs: none
+ * @details Outputs: monitored voltages data msg constructed and queued.
+ * @param data Latest monitored voltage values.
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL broadcastVoltagesData( VOLTAGES_DATA_PAYLOAD_T data )
+{
+    BOOL result;
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
+
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_HD_VOLTAGES_DATA;
+    msg.hdr.payloadLen = sizeof( VOLTAGES_DATA_PAYLOAD_T );
+
+    memcpy( payloadPtr, &data, sizeof( VOLTAGES_DATA_PAYLOAD_T ) );
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_NOT_REQUIRED );
+
+    return result;
 }
 
 /*********************************************************************//**
@@ -2752,6 +2812,31 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleAlarmAudioVolumeSetCmd function handles a alarm audio volume
+ * set request message from the UI.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleAlarmAudioVolumeSetCmd( MESSAGE_T *message )
+{
+    if ( sizeof( U32 ) == message->hdr.payloadLen )
+    {
+        U32 payload;
+
+        memcpy( &payload, &message->payload[0], sizeof( U32 ) );
+
+        setAlarmAudioVolume( payload );
+    }
+    else
+    {
+        sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, FALSE );
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleSalineBolusRequest function handles a saline bolus request
  * message from the UI.
  * @details Inputs: none