In order to setup our offices to use NextGen on iPads, we had to setup wireless routers. Ultimately we decided on the Cisco 541N wireless router. It has the ability to connect to additional 541N routers to create a mesh network for large spaces.
If you need to setup wireless in your office for your EHR implementation, consider this Cisco router.
Cisco AP 541N Dual Band 802.11n Single Radio Clustering Wireless Access Point