diff --git a/modules/rhizo_base/templates/osmo-nitb.cfg.erb b/modules/rhizo_base/templates/osmo-nitb.cfg.erb
index 23feb52..67a4970 100644
--- a/modules/rhizo_base/templates/osmo-nitb.cfg.erb
+++ b/modules/rhizo_base/templates/osmo-nitb.cfg.erb
@@ -429,3 +429,9 @@ smpp
  esme NOTIFY
   password Password
   no deliver-src-imsi
+ esme NOT_BOUND
+  password na
+  route prefix international isdn 52
+  route prefix unknown isdn 0
+  route prefix unknown isdn 55
+  route prefix unknown isdn 95