Lenovo ES-257 Ethernet 100 Mbit/sES 257 2x Port RS232 Fast Ethernet, 0. 92W, 234g, Black Yellow Ethernet to Serial device server providing access to two RS232 serial ports. Data transfer rates up to 230,400 baud rates, coupled with 1Mbit s line drivers deliver uncompromising performance. Our ES range provides simple instant networked serial ports. A web interface allows secure configuration and control of the serial ports over a local network or the internet using any browser. For