diff --git a/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-template.constant.js b/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-template.constant.js
new file mode 100644
index 000000000..815cd94aa
--- /dev/null
+++ b/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-template.constant.js
@@ -0,0 +1,6 @@
+angular.module('managerApp').constant('PACK_XDSL_MODEM_TEMPLATE', {
+  errors: {
+    duplicate: 'TemplateName',
+    invalid: 'Invalid',
+  },
+});
diff --git a/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-templates.controller.js b/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-templates.controller.js
index 70926fbaf..47638b38b 100644
--- a/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-templates.controller.js
+++ b/client/app/telecom/pack/xdsl/modem/templates/pack-xdsl-modem-templates.controller.js
@@ -1,7 +1,7 @@
 angular.module('managerApp').controller('XdslModemTemplateCtrl', class XdslModemTemplateCtrl {
   /* @ngInject */
   constructor($stateParams, $translate, $uibModal, OvhApiXdsl, TucPackXdslModemMediator,
-    TucToast) {
+    TucToast, PACK_XDSL_MODEM_TEMPLATE) {
     this.$stateParams = $stateParams;
     this.$translate = $translate;
     this.$uibModal = $uibModal;
@@ -9,6 +9,7 @@ angular.module('managerApp').controller('XdslModemTemplateCtrl', class XdslModem
     this.OvhApiXdsl = OvhApiXdsl;
     this.templateName = null;
     this.TucToast = TucToast;
+    this.TEMPLATE_CONSTANT = PACK_XDSL_MODEM_TEMPLATE;
   }
 
   /*= =====================================
@@ -46,11 +47,17 @@ angular.module('managerApp').controller('XdslModemTemplateCtrl', class XdslModem
       this.templateName = null;
       this.getModemTemplates();
     }).catch((err) => {
+      let errorMessage = '';
+      if (err.data.message.includes(this.TEMPLATE_CONSTANT.errors.duplicate)) {
+        errorMessage = this.$translate.instant('xdsl_modem_template_name_already_exist', { templateName: this.templateName });
+      } else if (err.data.message.includes(this.TEMPLATE_CONSTANT.errors.invalid)) {
+        errorMessage = this.$translate.instant('xdsl_modem_template_invalid_name', { templateName: this.templateName });
+      } else {
+        errorMessage = this.$translate.instant('xdsl_modem_template_an_error_ocurred');
+      }
       this.message = {
         type: 'error',
-        detail: err.data.message.includes('TemplateName')
-          ? this.$translate.instant('xdsl_modem_template_name_already_exist', { templateName: this.templateName })
-          : this.$translate.instant('xdsl_modem_template_an_error_ocurred'),
+        detail: errorMessage,
       };
     });
   }
diff --git a/client/app/telecom/pack/xdsl/modem/templates/translations/Messages_fr_FR.json b/client/app/telecom/pack/xdsl/modem/templates/translations/Messages_fr_FR.json
index 40437d54d..9afdd89d0 100644
--- a/client/app/telecom/pack/xdsl/modem/templates/translations/Messages_fr_FR.json
+++ b/client/app/telecom/pack/xdsl/modem/templates/translations/Messages_fr_FR.json
@@ -9,5 +9,6 @@
   "xdsl_modem_template_apply_doing": "Chargement de la configuration du modem en cours",
   "xdsl_modem_template_creation_doing": "Enregistrement de la configuration du modem en cours",
   "xdsl_modem_template_an_error_ocurred": "TEMPLATE : Une erreur est survenue !",
-  "xdsl_modem_template_name_already_exist": "{{templateName}} existe déjà dans votre liste de templates. Veuillez utiliser un autre nom."
-}
\ No newline at end of file
+  "xdsl_modem_template_name_already_exist": "{{templateName}} existe déjà dans votre liste de templates. Veuillez utiliser un autre nom.",
+  "xdsl_modem_template_invalid_name": "Le nom de template ({{templateName}}) est invalide. Veuillez utiliser un autre nom."
+}