diff --git a/call_manager.py b/call_manager.py
index 6e4063d..cd932ad 100644
--- a/call_manager.py
+++ b/call_manager.py
@@ -10,16 +10,24 @@ OP_PING = 'PING'.encode()
 OP_OK = 'OK'.encode()
 OP_ERROR = 'ERROR'.encode()
 
+def exec_mumble(deaf: bool):
+    subprocess.Popen(['mumble', 'rpc', 'deaf' if deaf else 'undeaf'])
+
+def deaf_mumble():
+    exec_mumble(true)
+
+def undeaf_mumble():
+    exec_mumble(false)
+
 class CallManager:
     def __init__(self, config):
         self.config = config
         self.state = NO_CALL
         self.station = None
-        self.call_process = None
 
     def call(self, station):
         try:
-            self.call_process = subprocess.Popen(['parole', '-c', station['host'], '-d', self.config['audio device']])
+            undeaf_mumble()
             s = socket.socket()
             print('host=', station['host'])
             print('port=', station['port'])
@@ -34,10 +42,9 @@ class CallManager:
         except Exception as e:
             print('Error al realizar la llamada: ', e)
             station['green'].off()
-            self.call_process.terminate()
-            self.call_process.communicate()
 
     def incoming_call(self, station):
+        undeaf_mumble()
         self.state = INCOMING_CALL
         self.station = station
         station['red'].on()
@@ -46,9 +53,7 @@ class CallManager:
         print('Hang! self.station', self.station)
         if self.station is not None:
             self.station['red'].off()
-        if self.call_process is not None:
-            self.call_process.terminate()
-            self.call_process.communicate()
+        deaf_mumble()
         self.state = NO_CALL
         self.station = None
 
diff --git a/intercom.py b/intercom.py
index fdd7306..a17b2f9 100644
--- a/intercom.py
+++ b/intercom.py
@@ -102,9 +102,7 @@ for _station in stations:
 try:
     while True:
         for _station in stations:
-            # new_input_state = GPIO.input(_station['button'])
             new_input_state = _station['btn'].is_pressed
-#            print('new_input_state ', new_input_state)
             # Al pulsar el interruptor cambia el estado.
             elapsed_time = time.clock_gettime(time.CLOCK_MONOTONIC) - _station['button state changed time']
             if new_input_state != _station['old button state'] and elapsed_time > 0.2:
diff --git a/parole.service b/mumble.service
similarity index 73%
rename from parole.service
rename to mumble.service
index 6908b97..4498990 100644
--- a/parole.service
+++ b/mumble.service
@@ -1,9 +1,9 @@
 [Unit]
-Description=Parole
+Description=Mumble
 After=network.target
 
 [Service]
-ExecStart=/usr/bin/parole -la -d plughw:1,0
+ExecStart=xvfb-run mumble mumble://uli@miki
 WorkingDirectory=/home/pi
 StandardOutput=inherit
 StandardError=inherit