The Haas control can be hooked up to your Windows network without any additional software. Haas has documentation on their web site for the basic connection.
The one security issue I ran into was that if the Windows firewall was NOT enabled the DHCP protocol would not recognize the Haas control and allow a connection.
If you are considering a serial DNC network, Vega DATA-View supports the Haas with both Xon/Xoff and XModem. It also supports file mid-starts with point and click start-up.
The DATA-Optimize is really impressive on the new Haas systems and can reduce cycle time of complex part surfaces by more than 50% and with a better surface finish.
There is a FREE fully functional demo at www.vegacnc.com