diff --git a/library/Osmocom_CTRL_Adapter.ttcn b/library/Osmocom_CTRL_Adapter.ttcn
index fefff8b..e1fba1b 100644
--- a/library/Osmocom_CTRL_Adapter.ttcn
+++ b/library/Osmocom_CTRL_Adapter.ttcn
@@ -40,6 +40,20 @@
 	}
 }
 
+/* wait for IPA CTRL link to connect and send UP */
+function f_ipa_ctrl_wait_link_down()
+runs on CTRL_Adapter_CT {
+	timer T := 10.0;
+	T.start;
+	alt {
+	[] IPA_CTRL.receive(tr_ASP_IPA_EV(ASP_IPA_EVENT_DOWN)) { }
+	[] T.timeout {
+		setverdict(fail, "Timeout CTRL waiting for ASP_IPA_EVENT_DOWN");
+		mtc.stop;
+		}
+	}
+}
+
 /*! Start the CTRL client connection to the specified CTRL IP+Port server*/
 function f_ipa_ctrl_start_client(charstring bsc_host, PortNumber bsc_port)
 runs on CTRL_Adapter_CT {