diff --git a/back/models/sip.js b/back/models/sip.js
new file mode 100644
index 000000000..62ae1eff9
--- /dev/null
+++ b/back/models/sip.js
@@ -0,0 +1,11 @@
+module.exports = Self => {
+    // Validations
+
+    Self.validatesUniquenessOf('extension', {
+        message: `The extension must be unique`
+    });
+
+    Self.validatesPresenceOf('secret', {
+        message: `The secret can't be blank`
+    });
+};
diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index d4f3733b0..a67926e6f 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -73,5 +73,7 @@
 	"Street cannot be empty": "Dirección no puede estar en blanco",
 	"City cannot be empty": "Cuidad no puede estar en blanco",
 	"Code cannot be blank": "Código no puede estar en blanco",
-	"You cannot remove this department": "No puedes eliminar este departamento"
+	"You cannot remove this department": "No puedes eliminar este departamento",
+	"The extension must be unique": "La extensión debe ser unica",
+	"The secret can't be blank": "La contraseña no puede estar en blanco"
 }
\ No newline at end of file
diff --git a/modules/worker/front/pbx/index.html b/modules/worker/front/pbx/index.html
index 3fa8c9bd8..931cf70fc 100644
--- a/modules/worker/front/pbx/index.html
+++ b/modules/worker/front/pbx/index.html
@@ -1,11 +1,8 @@
-<mg-ajax path="/api/Sips/{{patch.params.id}}" options="vnPatch"></mg-ajax>
 <vn-watcher
     vn-id="watcher"
-    data="$ctrl.worker.sip"
-    form="form"
-    save="patch">
+    data="$ctrl.worker.sip">
 </vn-watcher>
-<form name="form" ng-submit="watcher.submit()" compact>
+<form name="form" ng-submit="$ctrl.onSubmit()" compact>
     <vn-card pad-large>
         <vn-vertical>
             <vn-horizontal>
diff --git a/modules/worker/front/pbx/index.js b/modules/worker/front/pbx/index.js
index 70dcc9aef..9e0cef8ec 100644
--- a/modules/worker/front/pbx/index.js
+++ b/modules/worker/front/pbx/index.js
@@ -1,7 +1,31 @@
 import ngModule from '../module';
 
+class Controller {
+    constructor($scope, $http) {
+        this.$scope = $scope;
+        this.$http = $http;
+    }
+
+    onSubmit() {
+        const sip = this.worker.sip;
+        const params = {
+            userFk: this.worker.userFk,
+            extension: sip.extension,
+            secret: sip.secret
+        };
+        this.$scope.watcher.check();
+        this.$http.patch('/api/Sips', params).then(() => {
+            this.$scope.watcher.updateOriginalData();
+            this.$scope.watcher.notifySaved();
+        });
+    }
+}
+
+Controller.$inject = ['$scope', '$http'];
+
 ngModule.component('vnWorkerPbx', {
     template: require('./index.html'),
+    controller: Controller,
     bindings: {
         worker: '<'
     }
diff --git a/package-lock.json b/package-lock.json
index 3702498e9..3b85ba388 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10821,6 +10821,7 @@
               "version": "1.1.11",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "balanced-match": "^1.0.0",
                 "concat-map": "0.0.1"
@@ -10993,6 +10994,7 @@
               "version": "3.0.4",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "brace-expansion": "^1.1.7"
               }
@@ -16746,7 +16748,7 @@
     },
     "xmlbuilder": {
       "version": "9.0.7",
-      "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.7.tgz",
+      "resolved": "http://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.7.tgz",
       "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0="
     },
     "xmlcreate": {