diff --git a/library/BSSAP_LE_Adapter.ttcn b/library/BSSAP_LE_Adapter.ttcn
index 256d8fa..9305c63 100644
--- a/library/BSSAP_LE_Adapter.ttcn
+++ b/library/BSSAP_LE_Adapter.ttcn
@@ -56,7 +56,7 @@
 	integer peer_pc,
 	integer peer_ssn,
 	octetstring sio,
-	integer rctx
+	integer rctx optional
 };
 type record of BSSAP_LE_Configuration BSSAP_LE_Configurations;
 
@@ -84,6 +84,13 @@
 	ops.sccp_addr_local := ba.sccp_addr_own;
 	ops.sccp_addr_peer := ba.sccp_addr_peer;
 
+	var template (omit) integer rctx;
+	if (not ispresent(cfg.rctx)) {
+		rctx := omit;
+	} else {
+		rctx := cfg.rctx;
+	}
+
 	/* create components */
 	ba.vc_SCCP := SCCP_CT.create(id & "-SCCP") alive;
 	if (isvalue(ops)) {
@@ -95,7 +102,7 @@
 	map(ba.vc_M3UA:SCTP_PORT, system:sctp);
 	/* connect MTP3 service provider (M3UA) to lower side of SCCP */
 	connect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT);
-	ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr, cfg.rctx));
+	ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr, rctx));
 
 	if (isvalue(ops)) {
 		timer T := 5.0;