The Umbraco demo you can download on this page is only part of the Evision Ecommerce system. The demo is including a set of demo data which has been exported from a full Evision Ecommerce system connected to a Microsoft Dynamics Navision. This provides access to test out frontend functionality on demo data, without setting up an entire system connected to an ERP.
Features you might want to try includes:
For a description of all features, please see the documentation.
All of these features are managed inside the ERP system, and with the full Evision Ecommerce system, the frontend will be completely updated with all data needed for these features to work without contacting the ERP.
Datatransmission is then reserved for updating changes from the ERP to the front in the background and transmitting new EOrders and Customers from the front to the ERP. This way the frontend is never waiting for a response from the ERP, which helps a lot on performance.