diff --git a/config.py b/config.py
index 4dcc172..9c973fb 100644
--- a/config.py
+++ b/config.py
@@ -20,7 +20,7 @@ LOGLEVEL=logging.DEBUG
 
 ## serial port settings:
 #PORT="/dev/pts/5"
-PORT="/dev/ttyUSB3"
+PORT="/dev/ttyUSB1"
 BAUDRATE="1200"
 # if the system is connected directly (null-modem): MODE=direct
 # if the system is connected via a modem: MODE=modem
diff --git a/rtx.py b/rtx.py
index cb5082e..4f3002d 100755
--- a/rtx.py
+++ b/rtx.py
@@ -89,16 +89,23 @@ while True:
         rtxModem.init_modem()
         rtxModem.wait_for_caller()
         rtxHelpers.send_welcome_page()
-    elif glob.mode == "minibtx":
-        minibtx.wait_for_minibtx()
-        rtxHelpers.send_welcome_page()
 
     # main loop to read data from client
     while True:
         in_byte = glob.ser.read(1)
+
+        if glob.mode == "minibtx":
+            if in_byte == b'\x01':
+                logging.info("miniBtx starts connection... waiting for connection...")
+                minibtx.wait_for_minibtx()
+                rtxHelpers.send_welcome_page()
+                break
+
         rtxHelpers.process_byte(in_byte)
+
         if glob.mode == "modem":
             if glob.ser.getCD() == False:
+                logging.info("modem hangup.")
                 break