diff --git a/xos/models.py b/xos/models.py
new file mode 100644
index 0000000..ce2e345
--- /dev/null
+++ b/xos/models.py
@@ -0,0 +1,89 @@
+from django.db import models
+from core.models import Service, PlCoreBase, Slice, Instance, Tenant, TenantWithContainer, Node, Image, User, Flavor, Subscriber, NetworkParameter, NetworkParameterType, Port, AddressPool
+from core.models.plcorebase import StrippedCharField
+import os
+from django.db import models, transaction
+from django.forms.models import model_to_dict
+from django.db.models import Q
+from operator import itemgetter, attrgetter, methodcaller
+from core.models import Tag
+from core.models.service import LeastLoadedNodeScheduler
+from services.volt.models import CordSubscriberRoot
+import traceback
+from xos.exceptions import *
+from xos.config import Config
+
+class ConfigurationError(Exception):
+    pass
+
+VTR_KIND = "vTR"
+
+CORD_USE_VTN = getattr(Config(), "networking_use_vtn", False)
+
+# -------------------------------------------
+# VOLT
+# -------------------------------------------
+
+class VTRService(Service):
+    KIND = VTR_KIND
+
+    class Meta:
+        app_label = "vtr"
+        verbose_name = "vTR Service"
+        proxy = True
+
+class VTRTenant(Tenant):
+    class Meta:
+        proxy = True
+
+    KIND = VTR_KIND
+
+    TEST_CHOICES = ( ("ping", "Ping"), ("traceroute", "Trace Route"), ("tcpdump", "Tcp Dump") )
+    SCOPE_CHOICES = ( ("container", "Container"), ("vm", "VM") )
+
+    simple_attributes = ( ("test", None),
+                          ("argument", None),
+                          ("result", None),
+                          ("result_code", None),
+                          ("target_id", None),
+                          ("scope", "container") )
+
+    sync_attributes = ( 'test', 'argument', "scope" )
+
+    def __init__(self, *args, **kwargs):
+        vtr_services = VTRService.get_service_objects().all()
+        if vtr_services:
+            self._meta.get_field("provider_service").default = vtr_services[0].id
+        super(VTRTenant, self).__init__(*args, **kwargs)
+
+    @property
+    def target(self):
+        if getattr(self, "cached_target", None):
+            return self.cached_target
+        target_id=self.target_id
+        if not target_id:
+            return None
+        users=CordSubscriberRoot.objects.filter(id=target_id)
+        if not users:
+            return None
+        user=users[0]
+        self.cached_target = users[0]
+        return user
+
+    @target.setter
+    def target(self, value):
+        if value:
+            value = value.id
+        if (value != self.get_attribute("target_id", None)):
+            self.cached_target=None
+        self.target_id = value
+
+    def save(self, *args, **kwargs):
+        super(VTRTenant, self).save(*args, **kwargs)
+
+    def delete(self, *args, **kwargs):
+        super(VTRTenant, self).delete(*args, **kwargs)
+
+
+VTRTenant.setup_simple_attributes()
+