Brainboxes es series ethernet to serial adaptors brainboxes es 842 ethernet to serial device server providing access to 8 rs422 485 serial ports data transfer rates up to 1 000 000 baud rates coupled with 1mbits line drivers deliver uncompromising performance the es 842 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 browserfor windows the in house designed 32 bit