diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index a2a7804d5..4ae90bb54 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -3326,7 +3326,18 @@ testcase TC_ciph_mode_a5_3() runs on test_CT {
vc_conn.done;
f_shutdown_helper();
}
+/* Establish a Signalling channel with A5/4 encryption. */
+testcase TC_ciph_mode_a5_4() runs on test_CT {
+ var MSC_ConnHdlr vc_conn;
+ var TestHdlrParams pars := f_gen_test_hdlr_pars();
+ pars.encr := valueof(t_EncrParams('10'O, f_rnd_octstring(8), f_rnd_octstring(16)));
+ f_init(1, true);
+ f_sleep(1.0);
+ vc_conn := f_start_handler(refers(f_tc_ciph_mode_a5), pars);
+ vc_conn.done;
+ f_shutdown_helper();
+}
/* establish initial channel, enable ciphering followed by assignment to ciphered channel */
private function f_tc_assignment_aoip_tla_v6(charstring id) runs on MSC_ConnHdlr {
var template PDU_BSSAP exp_compl := f_gen_exp_compl();
@@ -8923,6 +8934,7 @@ control {
execute( TC_ciph_mode_a5_0() );
execute( TC_ciph_mode_a5_1() );
execute( TC_ciph_mode_a5_3() );
+ execute( TC_ciph_mode_a5_4() );
execute( TC_assignment_codec_fr() );
execute( TC_assignment_codec_fr_by_mode_modify() );
diff --git a/bsc/expected-results.xml b/bsc/expected-results.xml
index f91de1993..ab1a9e405 100644
--- a/bsc/expected-results.xml
+++ b/bsc/expected-results.xml
@@ -51,6 +51,7 @@
+