When using the Environics Mobility Suite, we use and recommend the Vlinx Serial Server Ethernet-to-Serial Adapter. Adapters are available through a variety of online and brick-and-morter stores.
10/100 Mbps Ethernet with Auto Selection
Software Support - Windows 2000, XP, Server 2003, Vista, Server 2008 & Windows 7 as well as Firmware Upload for future revisions/upgrades
Heart Beat Connection - selectable protocol ensures reliable communications in Virtual COM Port or Paired Connection modes. This feature restores the connections if communications are temporarily lost at either end due to loss of power or the Ethernet connection.
VLINX ESP Manager Software for Windows allows configuration via a network connection or directly from the Ethernet port of a computer (using an Ethernet crossover cable)