The SMDR equipment isn't used, it's new. However, from all the rest of the comments I've collected here, it looks like the whole system is a white elephant now. Too bad we aren't in a position to replace the whole system and start from scratch. We'll be leaving the building (rented) and starting a new location/new business in a couple years. Guess we'll be paying the phone company until then. Thanks to all of you who commented.