diff --git a/modem/arq_session_irs.py b/modem/arq_session_irs.py
index 8e0b461f..1c853568 100644
--- a/modem/arq_session_irs.py
+++ b/modem/arq_session_irs.py
@@ -96,9 +96,7 @@ class ARQSessionIRS(arq_session.ARQSession):
         self.log(f"Waiting {timeout} seconds...")
         if not self.event_frame_received.wait(timeout):
             self.log("Timeout waiting for ISS. Session failed.")
-            self.session_ended = time.time()
-            self.set_state(IRS_State.FAILED)
-            self.event_manager.send_arq_session_finished(False, self.id, self.dxcall, False, self.state.name, statistics=self.calculate_session_statistics())
+            self.transmission_failed()
 
     def launch_transmit_and_wait(self, frame, timeout, mode):
         thread_wait = threading.Thread(target = self.transmit_and_wait, 
@@ -208,11 +206,7 @@ class ARQSessionIRS(arq_session.ARQSession):
                                                          flag_checksum=False)
             self.transmit_frame(ack, mode=FREEDV_MODE.signalling)
             self.log("CRC fail at the end of transmission!")
-            self.session_ended = time.time()
-            self.set_state(IRS_State.FAILED)
-            self.event_manager.send_arq_session_finished(
-                False, self.id, self.dxcall, False, self.state.name, statistics=self.calculate_session_statistics())
-            return False, False
+            self.transmission_failed()
 
     def calibrate_speed_settings(self):
         self.speed_level = 0 # for now stay at lowest speed level
@@ -236,4 +230,13 @@ class ARQSessionIRS(arq_session.ARQSession):
         self.set_state(IRS_State.ABORTED)
         self.event_manager.send_arq_session_finished(
                 False, self.id, self.dxcall, False, self.state.name, statistics=self.calculate_session_statistics())
-        return None, None
\ No newline at end of file
+        return None, None
+
+    def transmission_failed(self, irs_frame=None):
+        # final function for failed transmissions
+        self.session_ended = time.time()
+        self.set_state(IRS_State.FAILED)
+        self.log(f"Transmission failed!")
+        self.event_manager.send_arq_session_finished(True, self.id, self.dxcall,False, self.state.name, statistics=self.calculate_session_statistics())
+        self.states.setARQ(False)
+        return None, None
diff --git a/modem/config.ini.example b/modem/config.ini.example
index c0496ed3..59cc6ea2 100644
--- a/modem/config.ini.example
+++ b/modem/config.ini.example
@@ -2,9 +2,9 @@
 modemport = 3050
 
 [STATION]
-mycall = XX1XXX
+mycall = AA1AAA
 mygrid = AA12aa
-myssid = 6
+myssid = 1
 ssid_list = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
 enable_explorer = True
 enable_stats = True
diff --git a/modem/server.py b/modem/server.py
index 3fb046f4..823c8ffb 100644
--- a/modem/server.py
+++ b/modem/server.py
@@ -222,10 +222,11 @@ def post_modem_send_raw_stop():
     if not app.state_manager.is_modem_running:
         api_abort('Modem not running', 503)
 
-    for id in app.state_manager.arq_irs_sessions:
-        app.state_manager.arq_irs_sessions[id].abort_transmission()
-    for id in app.state_manager.arq_iss_sessions:
-        app.state_manager.arq_iss_sessions[id].abort_transmission()
+    if app.state_manager.getARQ():
+        for id in app.state_manager.arq_irs_sessions:
+            app.state_manager.arq_irs_sessions[id].abort_transmission()
+        for id in app.state_manager.arq_iss_sessions:
+            app.state_manager.arq_iss_sessions[id].abort_transmission()
 
     return api_response(request.json)
 
diff --git a/tests/test_arq_session.py b/tests/test_arq_session.py
index 96d7e337..961c2262 100644
--- a/tests/test_arq_session.py
+++ b/tests/test_arq_session.py
@@ -130,11 +130,11 @@ class TestARQSession(unittest.TestCase):
 
     def testARQSessionSmallPayload(self):
         # set Packet Error Rate (PER) / frame loss probability
-        self.loss_probability = 0
+        self.loss_probability = 30
 
         self.establishChannels()
         params = {
-            'dxcall': "XX1XXX-1",
+            'dxcall': "AA1AAA-1",
             'data': base64.b64encode(bytes("Hello world!", encoding="utf-8")),
             'type': "raw_lzma"
         }
@@ -149,7 +149,7 @@ class TestARQSession(unittest.TestCase):
 
         self.establishChannels()
         params = {
-            'dxcall': "XX1XXX-1",
+            'dxcall': "AA1AAA-1",
             'data': base64.b64encode(np.random.bytes(1000)),
             'type': "raw_lzma"
         }
@@ -165,7 +165,7 @@ class TestARQSession(unittest.TestCase):
 
         self.establishChannels()
         params = {
-            'dxcall': "XX1XXX-1",
+            'dxcall': "AA1AAA-1",
             'data': base64.b64encode(np.random.bytes(100)),
         }
         cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
@@ -184,7 +184,7 @@ class TestARQSession(unittest.TestCase):
 
         self.establishChannels()
         params = {
-            'dxcall': "XX1XXX-1",
+            'dxcall': "AA1AAA-1",
             'data': base64.b64encode(np.random.bytes(100)),
         }
         cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
@@ -200,7 +200,7 @@ class TestARQSession(unittest.TestCase):
     def testSessionCleanupISS(self):
 
         params = {
-            'dxcall': "XX1XXX-1",
+            'dxcall': "AA1AAA-1",
             'data': base64.b64encode(np.random.bytes(100)),
         }
         cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)