diff --git a/src/api/ngcp-call.js b/src/api/ngcp-call.js
index 6cb108ff..0b1a876d 100644
--- a/src/api/ngcp-call.js
+++ b/src/api/ngcp-call.js
@@ -168,31 +168,36 @@ export function callUnregister () {
 }
 
 export async function callStart ({ number }) {
-    $localMediaStream = await callCreateLocalAudioStream()
-    callEvent.emit('localStream', $localMediaStream)
-    $outgoingRtcSession = $userAgent.call(number, {
-        eventHandlers: {
-            progress (event) {
-                if (event.response.status_code === 183) {
-                    callEvent.emit('outgoingProgress', event)
-                } else {
-                    callEvent.emit('outgoingRinging', event)
+    try {
+        $localMediaStream = await callCreateLocalAudioStream()
+        callEvent.emit('localStream', $localMediaStream)
+        $outgoingRtcSession = $userAgent.call(number, {
+            eventHandlers: {
+                progress (event) {
+                    if (event.response.status_code === 183) {
+                        callEvent.emit('outgoingProgress', event)
+                    } else {
+                        callEvent.emit('outgoingRinging', event)
+                    }
+                },
+                failed (event) {
+                    callEvent.emit('outgoingFailed', event)
+                },
+                confirmed (event) {
+                    callEvent.emit('outgoingConfirmed', event)
+                },
+                ended (event) {
+                    callEvent.emit('outgoingEnded', event)
+                    $outgoingRtcSession = null
                 }
             },
-            failed (event) {
-                callEvent.emit('outgoingFailed', event)
-            },
-            confirmed (event) {
-                callEvent.emit('outgoingConfirmed', event)
-            },
-            ended (event) {
-                callEvent.emit('outgoingEnded', event)
-                $outgoingRtcSession = null
-            }
-        },
-        mediaStream: $localMediaStream
-    })
-    $outgoingRtcSession.connection.ontrack = handleRemoteMediaStream
+            mediaStream: $localMediaStream
+        })
+        $outgoingRtcSession.connection.ontrack = handleRemoteMediaStream
+        return true
+    } catch (e) {
+        return false
+    }
 }
 
 export async function callAccept () {
diff --git a/src/components/call/CscCall.vue b/src/components/call/CscCall.vue
index d9e9774e..c21cf512 100644
--- a/src/components/call/CscCall.vue
+++ b/src/components/call/CscCall.vue
@@ -222,7 +222,7 @@
                 />
                 <q-btn
                     v-if="canStart"
-                    :disabled="!isIncoming && !isNumberInputDefined"
+                    :disabled="!isIncoming && (!isNumberInputDefined || microphoneNotAllowed)"
                     color="primary"
                     text-color="dark"
                     icon="call"
@@ -231,7 +231,15 @@
                     size="large"
                     data-cy="start-call"
                     @click="startCall('audioOnly')"
-                />
+                >
+                    <q-tooltip
+                        v-if="microphoneNotAllowed"
+                        :delay="500"
+                        class="text-dark"
+                    >
+                        {{ $t('No microphone authorized.') }}
+                    </q-tooltip>
+                </q-btn>
             </div>
             <div
                 v-if="minimized"
@@ -430,7 +438,9 @@ export default {
     data () {
         return {
             localMediaWrapperWidth: 0,
-            remoteMediaWrapperWidth: 0
+            remoteMediaWrapperWidth: 0,
+            microphoneNotAllowed: false,
+            permissionState: ''
         }
     },
     computed: {
@@ -570,7 +580,7 @@ export default {
             })
         }
     },
-    mounted () {
+    async mounted () {
         const fetchMediaWrapperWidth = () => {
             this.fetchLocalMediaWrapperWidth()
             this.fetchRemoteMediaWrapperWidth()
@@ -579,6 +589,18 @@ export default {
         this.emitter.$on('window-resized', fetchMediaWrapperWidth)
         this.emitter.$on('content-resized', fetchMediaWrapperWidth)
         this.emitter.$on('orientation-changed', fetchMediaWrapperWidth)
+        if (!navigator.userAgent.includes('Firefox')) {
+            const permission = await navigator.permissions.query({ name: 'microphone' })
+            this.permissionState = permission.state
+            this.microphoneNotAllowed = this.permissionState === 'denied'
+            permission.onchange = (event) => {
+                if (this.permissionState === 'prompt' && event.target.state === 'denied') {
+                    this.closeCall()
+                }
+                this.permissionState = permission.state
+                this.microphoneNotAllowed = event.target.state === 'denied'
+            }
+        }
     },
     methods: {
         fetchLocalMediaWrapperWidth () {
diff --git a/src/i18n/en.json b/src/i18n/en.json
index 2bf2e8c4..bbe1e1c9 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -289,6 +289,7 @@
     "No groups created yet": "No groups created yet",
     "No manager secretary configuration created yet": "No manager secretary configuration created yet",
     "No messages": "No messages",
+    "No microphone authorized.": "No microphone authorized.",
     "No numbers assigned": "No numbers assigned",
     "No numbers found": "No numbers found",
     "No parents assigned": "No parents assigned",
diff --git a/src/store/call/actions.js b/src/store/call/actions.js
index c485c59c..d4b9836e 100644
--- a/src/store/call/actions.js
+++ b/src/store/call/actions.js
@@ -16,6 +16,12 @@ import {
     callHasLocalCamera
 } from 'src/api/ngcp-call'
 import { errorVisibilityTimeout } from 'src/store/call/common'
+import {
+    showGlobalError
+} from 'src/helpers/ui'
+import {
+    i18n
+} from 'boot/i18n'
 
 let errorVisibilityTimer = null
 
@@ -26,11 +32,16 @@ export default {
             .replaceAll(' ', '')
             .replaceAll('-', '')
         context.commit('startCalling', number)
-        await callStart({
+        const isStarted = await callStart({
             number,
             localMedia
         })
-        context.commit('localMediaSuccess', callGetLocalMediaStreamId())
+        if (isStarted) {
+            context.commit('localMediaSuccess', callGetLocalMediaStreamId())
+        } else {
+            context.commit('inputNumber')
+            showGlobalError(i18n.global.tc('No microphone authorized.'))
+        }
     },
     async accept (context, localMedia) {
         await callAccept({