Adding a Down state to the call

piphone.py

@@ -306,6 +306,9 @@ class Call(object):
                 chan = ari.Channel(config['asterisk'], channel)
                 phone_logger.info('Hanging up channel {}'.format(channel))
                 chan.delete()
+        self.update((':'.join(['Down']
+            , event['channel']['id'].split('-')[-1]])
+            , event['timestamp']))
 
     def dtmf(self, event):
         '''