·Engineers and Project Managers that require a cost effective 4 port serial RS232-to-Ethernet solution that maintains serial device protocol integrity across Ethernet must consider the IOLAN STS4-D. Having the highest performance processor available along with the Perles unique TrueSerialTM technology, the IOLAN STS4-D will provide the most authentic serial connections across Ethernet. IOLAN STS4-D Serial Terminal Servers are also available with support for Power over Ethernet (PoE).