diff --git a/library/RSL_Emulation.ttcn b/library/RSL_Emulation.ttcn
index 91fa2db..f64329a 100644
--- a/library/RSL_Emulation.ttcn
+++ b/library/RSL_Emulation.ttcn
@@ -85,7 +85,7 @@
 };
 
 type port RSL_DCHAN_PT message {
-	inout RSLDC_ChanRqd, RSL_Message;
+	inout RSLDC_ChanRqd, RSL_Message, ASP_RSL_Unitdata;
 } with { extension "internal" };
 
 type port RSL_CCHAN_PT message {
@@ -638,6 +638,9 @@
 			cid := f_cid_by_comp_ref(vc_conn);
 			IPA_PT.send(ts_ASP_RSL_UD(rx_rsl_msg, ConnectionTable[cid].stream_id));
 			}
+		[bts_role] CLIENT_PT.receive(tr_ASP_RSL_UD(?, sid := ?)) -> value rx_rsl {
+			IPA_PT.send(ts_ASP_RSL_UD(rx_rsl.rsl, rx_rsl.streamId));
+			}
 		[not bts_role] CLIENT_PT.receive(tr_RSL_MsgType(?)) -> value rx_rsl_msg sender vc_conn {
 			cid := f_cid_by_comp_ref(vc_conn);
 			conn_id := f_trx_conn_map_resolve(ConnectionTable[cid].stream_id);