Staff Training via C4I System and Without a Simulation

Is it possible to create and run an entire staff training exercise using only C4I systems and the tools that they have on them or that can be installed on them? Could that community create their own training environment without relying on dedicated simulation systems and tools at all? What quality of event could they create if allowed to augment their standard C4I applications with a few additional applications or interface machines drawn from the public domain? One of the reasons I am interested in exploring the future of constructive simulation is that current C4I systems have many of the same tools and the units that use them may be able to train without traditional simulations.