diff --git a/src/api/common.js b/src/api/common.js
index cda70e05..233bacfd 100644
--- a/src/api/common.js
+++ b/src/api/common.js
@@ -4,7 +4,6 @@ import saveAs from 'file-saver'
 import _ from 'lodash'
 import { getJsonBody } from 'src/api/utils'
 import { getJwt, hasJwt } from 'src/auth'
-import { getCurrentLangAsV1Format } from 'src/i18n'
 import { PATH_CHANGE_PASSWORD } from 'src/router/routes'
 export const LIST_DEFAULT_PAGE = 1
 export const LIST_DEFAULT_ROWS = 24
@@ -69,12 +68,6 @@ export function initAPI ({ baseURL }) {
             if (config.method === 'POST' && (config.data === undefined || config.data === null)) {
                 config.data = {}
             }
-            if (!config.url?.includes('v2')) {
-                config.params = {
-                    ...config.params,
-                    lang: getCurrentLangAsV1Format()
-                }
-            }
 
             return config
         }
diff --git a/src/api/pbx-soundsets.js b/src/api/pbx-soundsets.js
index a5f5e646..ae70f881 100644
--- a/src/api/pbx-soundsets.js
+++ b/src/api/pbx-soundsets.js
@@ -16,7 +16,6 @@ import {
     getJwt,
     hasJwt
 } from 'src/auth'
-import { getCurrentLangAsV1Format } from 'src/i18n'
 
 export function getSoundSets (options) {
     return new Promise((resolve, reject) => {
@@ -204,10 +203,7 @@ export function uploadSoundFile (options) {
                 if (updatedConfig.method === 'POST' && (updatedConfig.data === undefined || updatedConfig.data === null)) {
                     updatedConfig.data = {}
                 }
-                updatedConfig.params = {
-                    ...updatedConfig.params,
-                    lang: getCurrentLangAsV1Format()
-                }
+
                 return updatedConfig
             })
             httpApi.post('api/soundfiles/', formData, {
diff --git a/src/components/CscMainMenuTop.vue b/src/components/CscMainMenuTop.vue
index 6c20b50f..0c9f64f4 100644
--- a/src/components/CscMainMenuTop.vue
+++ b/src/components/CscMainMenuTop.vue
@@ -45,12 +45,10 @@ export default {
     },
     computed: {
         ...mapGetters('user', [
-            'getCustomerId',
             'hasFaxCapability',
             'hasSubscriberProfileAttribute',
             'hasSubscriberProfileAttributes',
             'isLicenseActive',
-            'isOldCSCProxyingAllowed',
             'isPbxEnabled',
             'isSpCe'
         ]),
@@ -260,12 +258,6 @@ export default {
                     icon: 'devices',
                     label: this.$t('Registered Devices'),
                     visible: this.hasSubscriberProfileAttribute(PROFILE_ATTRIBUTE_MAP.registeredDevices)
-                },
-                {
-                    to: `/customer/${this.getCustomerId}/details`,
-                    icon: 'far fa-address-card',
-                    label: this.$t('Customer Details'),
-                    visible: this.isOldCSCProxyingAllowed
                 }
             ]
         }
diff --git a/src/i18n/de.json b/src/i18n/de.json
index a5173526..2d065d1f 100644
--- a/src/i18n/de.json
+++ b/src/i18n/de.json
@@ -139,7 +139,6 @@
     "Custom Announcements": "Individuelle Ansagen",
     "Custom sound": "Benutzerdefinierter Sound",
     "Custom time set": "Benutzerdefinierte Zeiteinstellung",
-    "Customer Details": "Kunden-Details",
     "Customer Phonebook": "Telefonbuch des Kunden",
     "Customer Preferences": "Kundenpräferenzen",
     "Daily": "Täglich",
diff --git a/src/i18n/en.json b/src/i18n/en.json
index 15520b72..4aa5f044 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -136,7 +136,6 @@
     "Custom Announcements": "Custom Announcements",
     "Custom sound": "Custom sound",
     "Custom time set": "Custom time set",
-    "Customer Details": "Customer Details",
     "Customer Phonebook": "Customer Phonebook",
     "Customer Preferences": "Customer Preferences",
     "Daily": "Daily",
diff --git a/src/i18n/es.json b/src/i18n/es.json
index 5f102e29..1ef48d43 100644
--- a/src/i18n/es.json
+++ b/src/i18n/es.json
@@ -139,7 +139,6 @@
     "Custom Announcements": "Anuncios Personalizados",
     "Custom sound": "Sonido personalizado",
     "Custom time set": "Intervalo de tiempo personalizado",
-    "Customer Details": "Detalles de cliente",
     "Customer Phonebook": "Customer Phonebook",
     "Customer Preferences": "Customer Preferences",
     "Daily": "Diariamente",
diff --git a/src/i18n/fr.json b/src/i18n/fr.json
index ddd11d6b..ed1eb9d6 100644
--- a/src/i18n/fr.json
+++ b/src/i18n/fr.json
@@ -139,7 +139,6 @@
     "Custom Announcements": "Annonces personnalisées",
     "Custom sound": "Son personnalisé",
     "Custom time set": "Intervalle de temps personnalisé",
-    "Customer Details": "Détails du client",
     "Customer Phonebook": "Annuaire du client",
     "Customer Preferences": "Préférences du client",
     "Daily": "Quotidien",
diff --git a/src/i18n/index.js b/src/i18n/index.js
index 2547401e..7aebcf1c 100644
--- a/src/i18n/index.js
+++ b/src/i18n/index.js
@@ -67,28 +67,6 @@ export async function setLanguage (locale) {
     // Note: please extend "reloadLanguageRelatedData" action in the store if you are using language related API endpoints
 }
 
-/**
- * It converts language code from V2 (new CSC) to V1 UI (old Panel CSC) format
- * @param {string} lang
- * @returns {string}
- */
-export function convertLangV2toV1 (lang) {
-    return lang === 'en-US' ? 'en' : lang
-}
-
-/**
- * It converts language code from V1 (old Panel CSC) to V2 UI (new CSC) format
- * @param {string} lang
- * @returns {string}
- */
-export function convertLangV1toV2 (lang) {
-    return ['en', 'i-default'].includes(lang) ? 'en-US' : lang
-}
-
-export function getCurrentLangAsV1Format () {
-    return convertLangV2toV1(i18n.locale)
-}
-
 export function normalizeLocaleCode (locale) {
     const shortLangCode = String(locale || 'en-US').substring(0, 2).toLowerCase()
     const langCodeInV2Format = (shortLangCode === 'en') ? 'en-US' : shortLangCode
diff --git a/src/i18n/it.json b/src/i18n/it.json
index e00c49b6..ffbdaf37 100644
--- a/src/i18n/it.json
+++ b/src/i18n/it.json
@@ -137,7 +137,6 @@
     "Custom Announcements": "Annunci personalizzati",
     "Custom sound": "Audio personalizzato",
     "Custom time set": "Intervallo di tempo personalizzato",
-    "Customer Details": "Dettagli cliente",
     "Customer Phonebook": "Rubrica cliente",
     "Customer Preferences": "Preferenze cliente",
     "Daily": "Giornaliero",
diff --git a/src/pages/Proxy.vue b/src/pages/Proxy.vue
deleted file mode 100644
index ab12304e..00000000
--- a/src/pages/Proxy.vue
+++ /dev/null
@@ -1,161 +0,0 @@
-<template>
-    <div
-        class="proxy-iframe-wrapper flex flex-center"
-    >
-        <iframe
-            v-show="loaded"
-            ref="proxyIframe"
-            class="proxy-iframe"
-            :src="finalSrc"
-            @load="loadedEvent"
-        />
-        <q-spinner
-            v-if="!loaded"
-            color="primary"
-            size="xl"
-        />
-    </div>
-</template>
-
-<script>
-import _ from 'lodash'
-import { showGlobalError } from 'src/helpers/ui'
-import { getCurrentLangAsV1Format } from 'src/i18n'
-import {
-    mapActions,
-    mapState
-} from 'vuex'
-export default {
-    // eslint-disable-next-line vue/multi-word-component-names
-    name: 'Proxy',
-    data () {
-        return {
-            loaded: false
-        }
-    },
-    computed: {
-        ...mapState('user', [
-            'currentPathIframe'
-        ]),
-        language () {
-            return getCurrentLangAsV1Format()
-        },
-        finalSrc () {
-            let url = null
-            if (_.isString(this.$appConfig.baseHttpUrl) && _.trim(this.$appConfig.baseHttpUrl) !== '') {
-                url = new URL(this.$appConfig.baseHttpUrl)
-            } else {
-                url = new URL(location.origin)
-            }
-            url.searchParams.set('framed', '1')
-            url.searchParams.set('lang', this.language)
-            if (this.$route?.meta?.proxyRewrite) {
-                return this.$route?.meta?.proxyRewrite({
-                    route: this.$route,
-                    url
-                }).toString()
-            }
-            url.pathname = this.$route.path
-            return url.toString()
-        }
-    },
-    watch: {
-        currentPathIframe (path) {
-            const routeData = this.$router.resolve(path)
-            if (!routeData?.meta?.proxy && !routeData?.meta?.proxyReverseInvisible) {
-                this.$router.push({
-                    path
-                })
-            }
-        }
-    },
-    mounted () {
-        window.addEventListener('message', this.trackMessagesFromV1, false)
-    },
-    beforeUnmount () {
-        window.removeEventListener('message', this.trackMessagesFromV1, false)
-    },
-    methods: {
-        ...mapActions('user', [
-            'logout'
-        ]),
-        loadedEvent () {
-            try {
-                const domEl = this.$refs.proxyIframe?.contentWindow?.document?.getElementById('login_page_v1')
-                if (domEl !== null) {
-                    this.logout()
-                    return
-                }
-
-                this.injectDarkUITheme()
-            } catch (err) {
-                // eslint-disable-next-line no-console
-                console.debug('Session expiration detection is disabled')
-                // eslint-disable-next-line no-console
-                console.debug(err)
-            } finally {
-                this.loaded = true
-            }
-        },
-        injectDarkUITheme () {
-            const framedWindow = this.$refs.proxyIframe.contentWindow
-            const $ = framedWindow.$
-            const darkThemeCSS = `
-                body {
-                    background: #3b3440; /* $darkBase */
-                    color: white;
-                    overflow: auto;
-                }
-                h1, h2, h3, h4, h5, h6 { color: white; }
-
-                .table-hover, .table-highlight { color: black; }
-                .table-hover tbody tr:hover > td,
-                .table-hover tbody tr:hover > th { background: none; }
-
-                .table-highlight.table-bordered tbody tr td,
-                .table-highlight.table-bordered tbody tr th { background-color: #F0F3F7; }
-
-                .table-highlight.table-bordered thead tr,
-                 table.ngcp-datatable tfoot tr { background: silver; }
-
-                .table-highlight.table-bordered thead th,
-                 table.ngcp-datatable tfoot td {
-                    text-shadow: none;
-                    color: black;
-                    border-left: 1px solid #F1F1F1;
-                    border-right: 1px solid #CCC;
-                    box-shadow: none;
-                }
-
-                .ngcp-modal,
-                .jquery-msgbox { color: #333; }
-                .modal-header { background: silver; border-color: white; }
-                .modal-header h3 { color: black; text-shadow: none; }
-
-                .accordion-inner { border-top: none; }
-            `
-            $(`<style>${darkThemeCSS}</style>`).appendTo(framedWindow.document.head)
-        },
-        trackMessagesFromV1 (event) {
-            if (event?.data?.origin === 'ngcp-panel') {
-                if (event?.data?.error) {
-                    showGlobalError(event.data.error)
-                }
-            }
-            if (event?.data?.origin === 'ngcp-panel-beforeunload') {
-                this.loaded = false
-            }
-        }
-    }
-}
-</script>
-
-<style lang="sass" rel="stylesheet/sass">
-    .proxy-iframe-wrapper
-        height: calc(100vh - 100px)
-        width: 100%
-        .proxy-iframe
-            border: none
-            height: calc(100vh - 100px)
-            width: 100%
-</style>
diff --git a/src/router/routes.js b/src/router/routes.js
index a121ae45..65420210 100644
--- a/src/router/routes.js
+++ b/src/router/routes.js
@@ -515,14 +515,6 @@ const routes = [
                     profileAttribute: PROFILE_ATTRIBUTE_MAP.registeredDevices
                 }
             },
-            {
-                path: '/customer/:pathMatch(.*)',
-                component: () => import('pages/Proxy'),
-                meta: {
-                    title: i18n.global.t('Customer Details'),
-                    subtitle: i18n.global.t('Customer Details')
-                }
-            },
             {
                 path: '*',
                 component: CscPageError404,
diff --git a/src/store/user.js b/src/store/user.js
index 7fa87158..2fa6deea 100644
--- a/src/store/user.js
+++ b/src/store/user.js
@@ -204,9 +204,6 @@ export default {
                     : true
             }
         },
-        isOldCSCProxyingAllowed (state, getters) {
-            return getters.isAdmin && state.platformInfo?.csc_v2_mode === 'mixed' && !!getters.getCustomerId
-        },
         isLicenseActive: (state) => {
             return (license) => {
                 return state?.platformInfo.licenses.includes(license)