diff --git a/README.md b/README.md
index 547ec15..5041b81 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,8 @@ For some general intro into V5, you might find the following OsmoDevCall
 recording interesting: https://media.ccc.de/v/osmodevcall-20211228-laforge-retro-isdn-v5
 
 Initial development was done just using the spec as reference; from 09/2022 onwards
-a Nokia EKSOS N20 became the primary target.
+a Nokia EKSOS N20 became the primary target.  The code has been uses successfully
+against Nokia EKSOS N20 and Siemens Fastlink.
 
 Homepage
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