They're entitled to one year's billing since they suspended service. As to monitoring, you already know the answer. No test signal =3D major liability problem. If you own the CS and you want the account, try to explain how important the test signal is. If they won't budge and you still want their business, do the test signals at no charge. Explain that you consider it important enough to their security as well as yours that you will process daily test signals for free rather than monitor it without them. Even if the client doesn't give in and pay the extra fee, he will respect your integrity for doing it.
Regards, Robert L Bass