In addition I have a D-link switch that is a wireless router I have this because my third station is wireless. It has two sides and a modem I've been told I need all of these connected in conjunction so I have a private internal network as well as internet access. Do I have to have internet access, as we are not using the credit card terminals on the machine? Curently the back computer "server" is connected to the internet via the modem then all workstations are neworked into that modem via cat5. It would seem to me that all this is doing is providing internet to all of the workstations, as well as the server.