diff --git a/config/switch.nix b/config/switch.nix
index 191aa46..f7d7dd3 100644
--- a/config/switch.nix
+++ b/config/switch.nix
@@ -307,8 +307,8 @@
         up3.ports = [ "3" ];
         # unifiac-mesh
         ap57.ports = [ "10" ];
-        # dump-dvb traffic-stop-box
-        c3d2.ports = [ "20" ];
+        # TLMS tetra and traffic-stop-box
+        c3d2.ports = [ "19,20" ];
       };
     };