... as the customers might, the manufacturers of this systemcannot get their head around the idea that this is a problem. That’s the way it works,they say, and users need to get over it.Another ... cancellation is a mathematicalfunction, the more of it the system has to perform, the higher the load on the CPUwill be. † Do not fear. Echo cancellation is another topic for Chapter 8.Dialplan ... required—even though the industry promised that they could. They lackedflexibility, and were priced totally out of step with the functionality they were delivering(or, more to the point, were failing...