public void Turnoff() { _modemState = _modemState.TurnOff(); }
public void TurnOn() { _modemState = _modemState.TurnOn(); }
public void Connect() { _modemState = _modemState.Connect(); }
public void Disconnect() { _modemState = _modemState.Disconnect(); }
public Modem() { _modemState = new Off(); }