diff --git a/gsm_call_fsm.py b/gsm_call_fsm.py
index a9ad8c0..c8bcf39 100644
--- a/gsm_call_fsm.py
+++ b/gsm_call_fsm.py
@@ -90,6 +90,10 @@ class GsmCallFsm(pykka.ThreadingActor):
                        bearer_cap = mncc_bearer_cap(self.codecs_permitted))
         self.mncc_ref.tell({'type': 'send', 'msg': msg})
 
+    def _onmncc_disc_req(self, e):
+        msg = mncc_msg(msg_type = mncc.MNCC_DISC_REQ, callref = self.callref)
+        self.mncc_ref.tell({'type': 'send', 'msg': msg})
+
     def find_matching_codec(self, ms_codecs):
         # find common denominator of permitted codecs and MS codecs
         for i in self.codecs_permitted:
@@ -182,6 +186,7 @@ class GsmCallFsm(pykka.ThreadingActor):
                          ('onmncc_call_conf_ind', self._onmncc_call_conf_ind),
                          ('onmncc_setup_cnf', self._onmncc_setup_cnf),
                          ('onmncc_disc_ind', self._onmncc_disc_ind),
+                         ('onmncc_disc_req', self._onmncc_disc_req),
                          ('onenterNULL', self._onenter_NULL),
                          ],
             )
@@ -302,6 +307,8 @@ class GsmCallFsm(pykka.ThreadingActor):
             self.connect_rtp(message['rtp'])
         elif message['type'] == 'get_callref':
             return self.callref
+        elif message['type'] == 'release':
+            self.fsm.mncc_disc_req(None)
         else:
             raise Exception('mncc', '%s: Unknown message %s' % (self, message))
 
@@ -366,3 +373,6 @@ class GsmCallConnector(pykka.ThreadingActor):
             self.rtp_created(message['called'], message['rtp'])
         #else:
         #    raise Exception('mncc', 'GsmCallConnector Rx Unknown message %s' % message)
+
+    def release(self):
+        self.call_a.tell({'type':'release'})
diff --git a/mncc_mt_loadgen.py b/mncc_mt_loadgen.py
index b0862eb..6603e00 100755
--- a/mncc_mt_loadgen.py
+++ b/mncc_mt_loadgen.py
@@ -120,6 +120,9 @@ class MTCallRtpsource(pykka.ThreadingActor):
         self.call.tell({'type':'start_mt_call',
                         'calling':self.msisdn_calling, 'called':self.msisdn_called})
 
+    def release(self):
+        self.call.tell({'type':'release'})
+
     def on_stop(self):
         # Attempt to do a graceful shutdown by deleting the RTP connection from rtpsource
         self.ctrl_act.ask({'type':'rtp_delete', 'cname':self.callref})
diff --git a/mncc_test.py b/mncc_test.py
index 90610e4..f92c94b 100755
--- a/mncc_test.py
+++ b/mncc_test.py
@@ -69,7 +69,8 @@ def connect_call(msisdn_a, msisdn_b, rtp_bridge = True, codecs = GSM48.AllCodecs
 log.info("")
 log.info("")
 log.info("Start calls by typing:")
-log.info('    connect_call("90001", "90002")')
+log.info('    c = connect_call("90001", "90002")')
+log.info('    c.release()')
 log.info("")
 log.info("")