A router is a network device that is designed to forward information. For instance, when a router is set up, you are able to access information to the internet. The information is directed by the router to your network. As a result, a router is connected to at least two networks -most common are: LANs or WANs or LANs and its Internet Service Provider (ISP).
This must be set up in order to view information from the internet. Many EHRs require you to access the internet, especially if you are using a web-based service. Other features that the EHR has that you will need a router for are patient or partner portals.