>>...my rule is: One UPS per PC, absolutely no exception. ...
>
>one UPS per PC, so one periodically check per UPS... :))
>
>My rule is one good brand UPS per network (Except small customers)...
>
>USe Windows Terminal Server for even local networks a better solution even from UPS. Because even your network cable cutted or client hanged up, never will be done your datas...

In our contracts, we require that our users use one UPS per PC, AND that the batteries are changed at least every year. Even if they use Terminal Server, we require a UPS. Better late than sorry, you know. Plus a UPS today is far cheaper than most people think. And after a short power outage, the customers are grateful to us.