diff --git a/BirdySlimDocumentation.md b/BirdySlimDocumentation.md
index e0ae147..3678b85 100644
--- a/BirdySlimDocumentation.md
+++ b/BirdySlimDocumentation.md
@@ -1 +1,4 @@
 ## Some more Info about the Birdy Slim (IoT) Pager
+
+
+- first 5 Characters of a Message can be used a MessageID, IF enabled per SubRIC