'Manually control flow of outgoing data - when hardware or software flow
control is enabled.
WARNING: this function is not portable to different platforms!'

def set_output_flow_control(self, enable=True):

    if (not self.is_open):
        raise portNotOpenError
    if enable:
        termios.tcflow(self.fd, termios.TCOON)
    else:
        termios.tcflow(self.fd, termios.TCOOFF)
