Start the transport.

async def start(self, remoteCaps, remotePort):
        """
        Start the transport.
        """
        if not self.__started:
            self.__started = True
            self.__state = 'connecting'
            self._remote_port = remotePort

            # configure logging
            if logger.isEnabledFor(logging.DEBUG):
                prefix = self.is_server and 'server ' or 'client '
                self.__log_debug = lambda msg, *args: logger.debug(prefix + msg, *args)

            # initialise local channel ID counter
            # one side should be using even IDs, the other odd IDs
            if self.is_server:
                self._data_channel_id = 0
            else:
                self._data_channel_id = 1

            self.__transport._register_data_receiver(self)
            if not self.is_server:
                await self._init()