diff --git a/devapp/dev_types.py b/devapp/dev_types.py
index b6e2c37..8a232a5 100644
--- a/devapp/dev_types.py
+++ b/devapp/dev_types.py
@@ -422,8 +422,7 @@ class Olt_ZTE_C320(OLTDevice):
             'firmware_ver': frm_ver,
             'loid_passw': loid_passw,
             'loid': loid,
-            'sn': sn,
-            'extra_snmp': '%d.%d' % (fiber_num, int(num))
+            'sn': sn
         } for frm_ver, loid_passw, loid, (sn, num) in zip(
             firmware_ver, loid_passws, loids, sn_num_list
         ))
@@ -526,7 +525,11 @@ class ZteOnuDevice(OnuDevice):
             if login is None or password is None:
                 raise DeviceConfigurationError('For ZTE configuration needed login and'
                                                ' password for telnet access in extra_data')
-            register_onu_ZTE_F660(
+            stack_num, rack_num, fiber_num, new_onu_port_num = register_onu_ZTE_F660(
                 olt_ip=ip, onu_sn=sn, login_passwd=(login.encode(), password.encode()),
                 onu_mac=mac
             )
+            bin_snmp_fiber_number = "10000{0:08b}{1:08b}00000000".format(rack_num, fiber_num)
+            snmp_fiber_num = int(bin_snmp_fiber_number, base=2)
+            device.snmp_extra = "%d.%d" % (snmp_fiber_num, new_onu_port_num)
+            device.save(update_fields=('snmp_extra',))
diff --git a/devapp/models.py b/devapp/models.py
index ca5a4cf..b0a94ee 100644
--- a/devapp/models.py
+++ b/devapp/models.py
@@ -96,7 +96,8 @@ class Device(models.Model):
         return "%s: (%s) %s %s" % (self.comment, self.get_devtype_display(), self.ip_address or '', self.mac_addr or '')
 
     def update_dhcp(self, remove=False):
-        if self.devtype not in ('On', 'Dl'):
+        # FIXME: Remove static list of registrable device types
+        if self.devtype not in ('On', 'Dl', 'Zo'):
             return
         if self.group is None:
             raise DeviceDBException(_('Device does not have a group, please fix that'))
diff --git a/devapp/templates/devapp/custom_dev_page/olt_ztec320_units_uncfg.html b/devapp/templates/devapp/custom_dev_page/olt_ztec320_units_uncfg.html
index 4a112b8..4fb45c0 100644
--- a/devapp/templates/devapp/custom_dev_page/olt_ztec320_units_uncfg.html
+++ b/devapp/templates/devapp/custom_dev_page/olt_ztec320_units_uncfg.html
@@ -45,7 +45,7 @@
                             <td>{{ onu.loid_passw }}</td>
                             <td>{{ onu.loid }}</td>
                             <td>
-                                <a href="{% url 'devapp:add' grp %}?t=Zo&pdev={{ dev.pk }}&c={{ onu.loid }}&n={{ onu.extra_snmp }}&mac={{ onu.mac }}" title="{% trans 'Create device' %}">
+                                <a href="{% url 'devapp:add' grp %}?t=Zo&pdev={{ dev.pk }}&c={{ onu.loid }}&mac={{ onu.mac }}" title="{% trans 'Create device' %}">
                                     <span class="glyphicon glyphicon-plus"></span>
                                 </a>
                             </td>
diff --git a/devapp/urls.py b/devapp/urls.py
index 5422b72..0125b16 100644
--- a/devapp/urls.py
+++ b/devapp/urls.py
@@ -20,7 +20,7 @@ urlpatterns = [
     url(r'^(?P<group_id>\d+)/(?P<device_id>\d+)/ports/(?P<port_id>\d+)/show_subscriber_on_port$',
         views.ShowSubscriberOnPort.as_view(), name='show_subscriber_on_port'),
     url(r'^(\d+)/(?P<device_id>\d+)/ports_add/$', views.add_ports, name='add_ports'),
-    url(r'^(\d+)/(?P<device_id>\d+)/regster_device/$', views.regster_device, name='dev_register'),
+    url(r'^(\d+)/(?P<device_id>\d+)/register_device/$', views.register_device, name='dev_register'),
     url(r'^(\d+)/(?P<device_id>\d+)/(?P<portid>\d+)_(?P<status>[0-1]{1})$', views.toggle_port, name='port_toggle'),
     url(r'^(?P<group_id>\d+)/(?P<device_id>\d+)/(?P<portid>\d+)/del$', views.delete_single_port, name='del_port'),
     url(r'^(?P<group_id>\d+)/(?P<device_id>\d+)/(?P<port_id>\d+)/edit$', views.edit_single_port, name='edit_port'),
diff --git a/devapp/views.py b/devapp/views.py
index 7bcbe7f..289c3e0 100644
--- a/devapp/views.py
+++ b/devapp/views.py
@@ -725,7 +725,7 @@ class DevicesGetListView(global_base_views.SecureApiView):
 
 @login_required
 @json_view
-def regster_device(request, device_id: str):
+def register_device(request, device_id: str):
     def format_msg(msg: str, icon: str):
         return ' '.join((
             '<span class="glyphicon glyphicon-%s"></span>' % icon,
diff --git a/djing/lib/tln/tln.py b/djing/lib/tln/tln.py
index e8a9ab8..7b025f4 100755
--- a/djing/lib/tln/tln.py
+++ b/djing/lib/tln/tln.py
@@ -202,7 +202,7 @@ class OltZTERegister(TelnetApi):
 
 
 @process_lock
-def register_onu_ZTE_F660(olt_ip: str, onu_sn: bytes, login_passwd: Tuple[bytes, bytes], onu_mac: bytes):
+def register_onu_ZTE_F660(olt_ip: str, onu_sn: bytes, login_passwd: Tuple[bytes, bytes], onu_mac: bytes) -> Tuple:
     onu_type = b'ZTE-F660'
     line_profile = b'ZTE-F660-LINE'
     remote_profile = b'ZTE-F660-ROUTER'
@@ -254,7 +254,7 @@ def register_onu_ZTE_F660(olt_ip: str, onu_sn: bytes, login_passwd: Tuple[bytes,
 
     tn.apply_conf_to_onu(onu_mac, 145)
     sleep(1)
-    return
+    return stack_num, rack_num, fiber_num, new_onu_port_num
 
 
 if __name__ == '__main__':