diff --git a/library/L1CTL_Types.ttcn b/library/L1CTL_Types.ttcn
index 7e7c9cf..03ec23f 100644
--- a/library/L1CTL_Types.ttcn
+++ b/library/L1CTL_Types.ttcn
@@ -169,6 +169,13 @@
 
 	template (value) L1ctlAudioMode t_L1CTL_AudioModeNone := { '0000'B, false, false, false, false };
 
+	/* Traffic forwarding mode (see TRAFFIC.{req,cnf,ind} messages) */
+	template (value) L1ctlAudioMode t_L1CTL_AudioModeFwd
+	modifies t_L1CTL_AudioModeNone := {
+		tx_traffic_req := true,
+		rx_traffic_ind := true
+	};
+
 	type record L1ctlTchModeConf {
 		L1ctlTchMode	tch_mode,
 		L1ctlAudioMode	audio_mode,
@@ -517,7 +524,7 @@
 
 	template (value) L1ctlUlMessage
 	ts_L1CTL_TCH_MODE_REQ(template (value) L1ctlTchMode tch_mode := L1CTL_CHAN_MODE_SIGN,
-			      template (value) L1ctlAudioMode audio_mode := t_L1CTL_AudioModeNone,
+			      template (value) L1ctlAudioMode audio_mode := t_L1CTL_AudioModeFwd,
 			      template (value) L1ctlLoopMode loop_mode := L1CTL_LOOP_MODE_OPEN) := {
 		header := ts_L1ctlHeader(L1CTL_TCH_MODE_REQ),
 		ul_info := omit,
@@ -618,7 +625,7 @@
 			dm_est_req := {
 				tsc := tsc,
 				tch_mode := L1CTL_CHAN_MODE_SIGN,
-				audio_mode := t_L1CTL_AudioModeNone
+				audio_mode := t_L1CTL_AudioModeFwd
 			}
 		}
 	}