diff --git a/devapp/dev_types.py b/devapp/dev_types.py
index 29f9df7..bdcb990 100644
--- a/devapp/dev_types.py
+++ b/devapp/dev_types.py
@@ -528,7 +528,7 @@ class ZteOnuDevice(OnuDevice):
         return '\n'.join(i for i in r if i)
 
     def register_device(self, extra_data: Dict):
-        _reg_dev_zte(self.db_instance, extra_data, register_f660_onu)
+        return _reg_dev_zte(self.db_instance, extra_data, register_f660_onu)
 
     def get_fiber_str(self):
         dev = self.db_instance
@@ -550,7 +550,7 @@ class ZteF601(ZteOnuDevice):
     description = 'Zte ONU F601'
 
     def register_device(self, extra_data: Dict):
-        _reg_dev_zte(self.db_instance, extra_data, register_f601_onu)
+        return _reg_dev_zte(self.db_instance, extra_data, register_f601_onu)
 
 
 class HuaweiSwitch(EltexSwitch):
diff --git a/devapp/templates/devapp/dev.html b/devapp/templates/devapp/dev.html
index d7a6588..fe85dba 100644
--- a/devapp/templates/devapp/dev.html
+++ b/devapp/templates/devapp/dev.html
@@ -70,7 +70,7 @@
                     </a>
                 {% endif %}
                 {% if perms.devapp.change_device %}
-                    <a href="{% url 'devapp:dev_register' grp_id dev.pk %}" class="btn btn-default btn-cmd">
+                    <a href="{% url 'devapp:dev_register' grp_id dev.pk %}" class="btn btn-default btn-cmd" data-form-val="#{{ form.snmp_extra.id_for_label }}">
                         <span class="glyphicon glyphicon-fire"></span> {% trans 'Register device' %}
                     </a>
                     <a href="{% url 'devapp:extra_data_edit' grp_id dev.pk %}" class="btn btn-default btn-modal">
diff --git a/devapp/views.py b/devapp/views.py
index c78532d..50199a3 100644
--- a/devapp/views.py
+++ b/devapp/views.py
@@ -828,5 +828,6 @@ def register_device(request, group_id: int, device_id: int):
         text = format_msg(msg='ok', icon='ok')
     return {
         'status': status,
-        'dat': text
+        'dat': text,
+        'extra_form_val': device.snmp_extra
     }
diff --git a/static/js/my.js b/static/js/my.js
index c785ca9..e41306b 100644
--- a/static/js/my.js
+++ b/static/js/my.js
@@ -277,6 +277,7 @@ $(document).ready(function () {
 	// button that send command and return response of that
 	$('.btn-cmd').on('click', function(){
 		var cmd_param = $(this).attr('data-param');
+		var form_val = $(this).attr('data-form-val');
 		var self = $(this);
 		self.removeClass('btn-default');
         self.removeClass('btn-danger');
@@ -290,6 +291,9 @@ $(document).ready(function () {
 			else
                 self.addClass('btn-danger');
             self.html(r.dat);
+            if(form_val){
+            	$(form_val).val(r.extra_form_val);
+			}
 		});
 		return false;
 	});