diff --git a/docs/operation/claim-dect-extension.md b/docs/operation/claim-dect-extension.md
new file mode 100644
index 0000000..4476ac0
--- /dev/null
+++ b/docs/operation/claim-dect-extension.md
@@ -0,0 +1,11 @@
+# Claim DECT extension
+
+Get a DECT phone an connect it to a new DECT base station.
+It will require an authentication code.
+This code got specified while [setting up the OMM](../install/omm.md#dect-devices-subscription).
+
+Wait for the base station registration succeed.
+
+After the base station registration wait a bit more to get a temporary number assigned.
+Then call `DECT claim token base` + `dect_claim_token`.
+The call should succeed and the DECT phone got the claimed token assigned.
diff --git a/docs/operation/troubleshooting.md b/docs/operation/troubleshooting.md
new file mode 100644
index 0000000..d71152e
--- /dev/null
+++ b/docs/operation/troubleshooting.md
@@ -0,0 +1,8 @@
+# Troubleshooting
+
+## Registering DECT phone to base station does not work anymore
+
+Make sure DECT `Subscription` is still set to `Subscription`.
+Sometimes this changes back to `Off` by itself.
+
+See [OMM setup](../install/omm.md#dect-devices-subscription)
diff --git a/mkdocs.yml b/mkdocs.yml
index a41b836..3199190 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -18,3 +18,6 @@ nav:
     - reference/configuration.md
     - reference/extensions.md
     - reference/controller.md
+  - Operation:
+    - operation/claim-dect-extension.md
+    - operation/troubleshooting.md