1 files changed, 26 insertions, 0 deletions
diff --git a/bts/README.md b/bts/README.md
new file mode 100644
index 00000000..058e1d25
--- /dev/null
+++ b/bts/README.md
@@ -0,0 +1,26 @@
+# BTS_Tests.ttcn
+
+* external interfaces
+    * A-bis side: RSL (emulates BSC-side server)
+    * Um side: L1CTL to control MS
+    * PCU side: pcu_socket
+
+{% dot bts_tests.svg
+digraph G {
+  rankdir=LR;
+  { rank=same; BTS, BSC};
+  BTS [label="IUT\nosmo-bts-trx",shape="box"];
+  ATS [label="ATS\nBTS_Tests.ttcn"];
+  BSC [label="osmo-bsc\nOML only"];
+  BTS -> fake_trx [label="bursts"];
+  fake_trx -> trxcon [label="bursts"];
+  trxcon -> ATS [label="bursts"];
+
+  BTS -> BSC [label="A-bis OML"];
+  BTS -> ATS [label="A-bis RSL"];
+
+  ATS -> BTS [label="pcu_sock"];
+  ATS -> BSC [label="VTY"];
+  ATS -> BTS [label="CTRL"];
+}
+%}