diff --git a/.env.development b/.env.development
index 590c68a..0d2cf46 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.657
+NEXT_PUBLIC_APP_VERSION=1.6.658
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 1fba4cd..ccd910d 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.657
+NEXT_PUBLIC_APP_VERSION=1.6.658
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 309112a..2c0aebc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.6.658] – 2025-07-31
+
+- feat; in KÜ Chart RSL und ISO start button
+
+---
 ## [1.6.657] – 2025-07-28
 
 - deat: KVz anzeigen
diff --git a/components/main/kabelueberwachung/kue705FO/Charts/IsoMeasurementChart/IsoChartActionBar.tsx b/components/main/kabelueberwachung/kue705FO/Charts/IsoMeasurementChart/IsoChartActionBar.tsx
index 6d99a43..5a3be62 100644
--- a/components/main/kabelueberwachung/kue705FO/Charts/IsoMeasurementChart/IsoChartActionBar.tsx
+++ b/components/main/kabelueberwachung/kue705FO/Charts/IsoMeasurementChart/IsoChartActionBar.tsx
@@ -237,14 +237,13 @@ const IsoChartActionBar: React.FC = () => {
           </div>
         </Listbox>
 
-        {/* ISO starten button*/}
-        <button
-          onClick={handleFetchData}
-          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm"
-          disabled={isLoading}
+        {/* Platzhalter für "ISO starten" Button, nimmt weiterhin Platz ein, aber ist unsichtbar */}
+        <span
+          style={{ visibility: "hidden" }}
+          className="px-10 py-1 bg-littwin-blue text-white rounded text-sm"
         >
           ISO starten
-        </button>
+        </span>
 
         <button
           onClick={handleFetchData}
diff --git a/components/main/kabelueberwachung/kue705FO/Charts/LoopMeasurementChart/LoopChartActionBar.tsx b/components/main/kabelueberwachung/kue705FO/Charts/LoopMeasurementChart/LoopChartActionBar.tsx
index d267e17..e253fe5 100644
--- a/components/main/kabelueberwachung/kue705FO/Charts/LoopMeasurementChart/LoopChartActionBar.tsx
+++ b/components/main/kabelueberwachung/kue705FO/Charts/LoopMeasurementChart/LoopChartActionBar.tsx
@@ -256,12 +256,12 @@ const LoopChartActionBar: React.FC = () => {
             </Listbox.Options>
           </div>
         </Listbox>
-        <div className="relative w-48"> </div>
+        <div className="relative w-16"> </div>
 
         {/* Schleife starten button*/}
         <button
           onClick={handleFetchData}
-          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm"
+          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm whitespace-nowrap"
           disabled={isLoading}
         >
           RSL starten
@@ -269,7 +269,7 @@ const LoopChartActionBar: React.FC = () => {
 
         <button
           onClick={handleFetchData}
-          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm"
+          className="px-4 py-1 bg-littwin-blue text-white rounded text-sm whitespace-nowrap"
         >
           Daten laden
         </button>
diff --git a/components/main/kabelueberwachung/kue705FO/Kue705FO.tsx b/components/main/kabelueberwachung/kue705FO/Kue705FO.tsx
index 75c4cd2..a86b880 100644
--- a/components/main/kabelueberwachung/kue705FO/Kue705FO.tsx
+++ b/components/main/kabelueberwachung/kue705FO/Kue705FO.tsx
@@ -78,6 +78,7 @@ const Kue705FO: React.FC<Kue705FOProps> = ({
     kueAlarm2: kueAlarm2Raw,
     kueOverflow: kueOverflowRaw,
     kuePSTmMinus96V, // <- richtig, weil so im State vorhanden
+    tdrActive, // <- TDR aktiv Status hinzugefügt
   } = useSelector((state: RootState) => state.kueDataSlice);
 
   //---------------------------------------------
@@ -168,10 +169,6 @@ const Kue705FO: React.FC<Kue705FOProps> = ({
   const openKvzModal = () => {
     setShowKvzPanel(!showKvzPanel);
   };
-
-  const closeKvzModal = () => {
-    setShowKvzPanel(false);
-  };
   //----------------------------------
   //hooks einbinden
   const kueVersion = useKueVersion(slotIndex, reduxKueVersion);
@@ -227,6 +224,9 @@ const Kue705FO: React.FC<Kue705FOProps> = ({
     activeButton
   );
 
+  // TDR aktiv Status für diesen Slot prüfen
+  const isTdrActiveForSlot = tdrActive?.[slotIndex] === 1;
+
   // Removed useChartData(loopMeasurementCurveChartData) as the state was unused
 
   //---------------------------------
@@ -392,12 +392,15 @@ const Kue705FO: React.FC<Kue705FOProps> = ({
 
             {/* TDR and KVz Buttons */}
             <div className="flex space-x-2 p-1">
-              <button
-                onClick={openTdrModal}
-                className=" bg-littwin-blue text-white text-[0.625rem] flex items-center justify-center p-2"
-              >
-                TDR
-              </button>
+              {/* TDR Button - nur anzeigen wenn TDR aktiv ist */}
+              {isTdrActiveForSlot && (
+                <button
+                  onClick={openTdrModal}
+                  className=" bg-littwin-blue text-white text-[0.625rem] flex items-center justify-center p-2"
+                >
+                  TDR
+                </button>
+              )}
               <button
                 onClick={openKvzModal}
                 className="bg-littwin-blue text-white text-[0.625rem] flex items-center justify-center p-2"
@@ -429,12 +432,14 @@ const Kue705FO: React.FC<Kue705FOProps> = ({
             slotIndex={slotIndex}
           />
 
-          {/* TDR Chart Modal */}
-          <TDRChartView
-            isOpen={showTdrModal}
-            onClose={closeTdrModal}
-            slotIndex={slotIndex}
-          />
+          {/* TDR Chart Modal - nur wenn TDR aktiv ist */}
+          {isTdrActiveForSlot && (
+            <TDRChartView
+              isOpen={showTdrModal}
+              onClose={closeTdrModal}
+              slotIndex={slotIndex}
+            />
+          )}
         </>
       )}
 
diff --git a/components/main/kabelueberwachung/kue705FO/modals/TdrEinstellung.tsx b/components/main/kabelueberwachung/kue705FO/modals/TdrEinstellung.tsx
index 6850779..24402f5 100644
--- a/components/main/kabelueberwachung/kue705FO/modals/TdrEinstellung.tsx
+++ b/components/main/kabelueberwachung/kue705FO/modals/TdrEinstellung.tsx
@@ -12,8 +12,9 @@ declare global {
 }
 
 import React, { useState } from "react";
-import { useSelector } from "react-redux";
+import { useSelector, useDispatch } from "react-redux";
 import { RootState } from "../../../../../redux/store";
+import { setKueData } from "../../../../../redux/slices/kueDataSlice";
 
 import { useAdminAuth } from "../../../settingsPageComponents/hooks/useAdminAuth";
 
@@ -24,6 +25,7 @@ interface Props {
 
 export default function TdrEinstellung({ slot, onClose }: Props) {
   const { isAdminLoggedIn } = useAdminAuth(true);
+  const dispatch = useDispatch();
   const tdrSlice = useSelector((state: RootState) => state.kueDataSlice);
 
   const cacheKey = `slot_${slot}`;
@@ -126,6 +128,11 @@ export default function TdrEinstellung({ slot, onClose }: Props) {
     setTdrActive(newState);
     updateCache(tdrData, newState);
 
+    // Redux State sofort aktualisieren für UI-Update
+    const updatedTdrActive = [...(tdrSlice.tdrActive || [])];
+    updatedTdrActive[slot] = newState ? 1 : 0;
+    dispatch(setKueData({ tdrActive: updatedTdrActive }));
+
     const isDev = window.location.hostname === "localhost";
     const slotParam = `KTX${slot}=${newState ? 1 : 0}`;
 
diff --git a/package-lock.json b/package-lock.json
index 68855fb..96dc33c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.657",
+  "version": "1.6.658",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.657",
+      "version": "1.6.658",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index fba8450..0ad538c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.657",
+  "version": "1.6.658",
   "private": true,
   "scripts": {
     "dev": "next dev",