diff --git a/lib/admin/Controller/subscriber.pm b/lib/admin/Controller/subscriber.pm
index 5dace28..f727282 100644
--- a/lib/admin/Controller/subscriber.pm
+++ b/lib/admin/Controller/subscriber.pm
@@ -273,6 +273,13 @@ sub detail : Local {
             $$preferences{$$pref{attribute}} =~ s/\@.*$//
                 if $$preferences{$$pref{attribute}} =~ /^\+?\d+\@/;
           }
+        } elsif($$pref{attribute} eq 'ncos') {
+          my $ncoslvl;
+          return unless $c->model('Provisioning')->call_prov( $c, 'billing', 'get_ncos_levels',
+                                                              undef,
+                                                              \$ncoslvl
+                                                            );
+          $c->stash->{ncos_levels} = $$ncoslvl{result} if eval { @{$$ncoslvl{result}} };
         }
 
         push @stashprefs,
@@ -600,6 +607,14 @@ sub update_preferences : Local {
 
     $$preferences{adm_block_in_clir} = $c->request->params->{adm_block_in_clir} ? 1 : undef;
 
+    if(defined $c->request->params->{ncos}) {
+        if(length $c->request->params->{ncos}) {
+            $$preferences{ncos} = $c->request->params->{ncos};
+        } else {
+            $$preferences{ncos} = undef;
+        }
+    }
+
     ### call forwarding ###
 
     my $fw_target_select = $c->request->params->{fw_target};
diff --git a/root/tt/subscriber_detail.tt b/root/tt/subscriber_detail.tt
index 02f4f50..49c664a 100644
--- a/root/tt/subscriber_detail.tt
+++ b/root/tt/subscriber_detail.tt
@@ -314,6 +314,27 @@
                       value="[% preference.value %]" />
                   </td>
                 </tr>
+                [% ELSIF preference.key == "ncos" %]
+                <tr>
+                  <td class="tdkey">[% preference.key %]:</td>
+                  <td>
+                    [% IF ncos_levels %]
+                      <select size="1" name="[% preference.key %]"
+                              [% IF ! edit_preferences %]class="disabled" disabled="disabled"[% END %] >
+                          <option value="" [% IF preference.value == "" %]
+                                             selected="selected"
+                                           [% END %]>[% lvl.level %]</option>
+                        [% FOREACH lvl = ncos_levels %]
+                          <option value="[% lvl.level %]"
+                                  [% IF preference.value == lvl.level %]selected="selected"[% END %]
+                                 >[% lvl.level %]</option>
+                        [% END %]
+                      </select>
+                    [% ELSE %]
+                      [% IF edit_preferences %]no NCOS levels defined[% END %]
+                    [% END %]
+                  </td>
+                </tr>
                 [% ELSE %]
                 <tr>
                   <td class="tdkey">[% preference.key %]:</td>