diff --git a/docs/facilities.md b/docs/facilities.md
index 533a8b1a637c85aff0af799da548a2019692b1ea..df79b9056b3b484d63dbe60ae6138416b754e6d6 100644
--- a/docs/facilities.md
+++ b/docs/facilities.md
@@ -109,6 +109,10 @@ operating a site-wide DECT and SIP network.
 * bring your DECT phone (only EU band phones for the DECT band work; US-DECT operates in 2.4 GHz and is not compatible) or SIP client
 * once on-site, you can self service your device. By calling you activation token. [how to activate](https://eventphone.de/blog/2018/08/30/the-new-dect-registration/#more-172)
 
+### Dialin
+
+As usual, we are reachable from the outside. After activation you can be reached by +49 3307 479 87 xxxx, where xxxx is your extension.
+
 ### Device/Client compatible
 
 A full list of working DECT phones can be found [here](https://eventphone.de/doku/dect_phone_compatibility_list).