Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -ra78832825a37fee62764199d7302a1babb989edd -r71d7c6359103b2bd22b2317f7d740c954476a34f
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision a78832825a37fee62764199d7302a1babb989edd)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 71d7c6359103b2bd22b2317f7d740c954476a34f)
@@ -8,7 +8,7 @@
 * @file    ModeStandby.c
 *
 * @author  (last)      Vijay Pamula
-* @date    (last)      07-Jul-2026
+* @date    (last)      27-Jul-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -85,6 +85,7 @@
 U32 transitionToStandbyMode( void )
 {
     TD_OP_MODE_T previousOpMode = getPreviousOperationMode();     //TODO
+//    U08 requestPayload[3] = { 0U, 0U, 0U };
 
     // Re-initialize when transitioning to standby mode
     initStandbyMode();
@@ -122,8 +123,8 @@
     // Request DD service record and usage information from DD
 //    sendDDServiceRequestToDD();
     //TODO: Service record id not available
-//    broadcastData( MSG_ID_TD_DD_REQUEST_SERVICE_RECORD_FROM_TD, COMM_BUFFER_OUT_CAN_TD_2_DD, requestPayload, sizeof( requestPayload ) );
-//    broadcastData( MSG_ID_TD_DD_USAGE_INFO_REQUEST, COMM_BUFFER_OUT_CAN_TD_2_DD, requestPayload, sizeof( requestPayload ) );
+//    sendMessage( MSG_ID_TD_DD_REQUEST_SERVICE_RECORD_FROM_TD, COMM_BUFFER_OUT_CAN_TD_2_DD, requestPayload, sizeof( requestPayload ) );
+//    sendMessage( MSG_ID_TD_DD_USAGE_INFO_REQUEST, COMM_BUFFER_OUT_CAN_TD_2_DD, requestPayload, sizeof( requestPayload ) );
 //    sendDDUsageInfoRequestToDD();        //TODO need to enable
 
     return currentStandbyState;
@@ -481,9 +482,12 @@
         }
         else if ( USER_COMMAND_CANCEL == cmd.command )
         {
-            //Cancel is not currently supported here.
-            //Keep rejected unless signalUserCancelTreatment() is implemented/enabled.
-            rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+            result = signalPreTreatmentBackoutToStandby();
+
+            if ( TRUE != result )
+            {
+                rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+            }
         }
         else
         {