Star Tech. com 16 Port USB to Serial RS232 Adapter - Daisy Chain - USB to RS232 Hub Convert a USB port into 16 RS232 serial ports in an industrial rack-mountable chassis and daisy chain multiple hubs for a scalable solution 16-Port USB-to-Serial Adapter Hub USB to RS232 port adapter with FTDI chipset and COM port retention Rackmountable all-metal chassis RS232 multiplexer with 921. 6 Kbps baud per port Meets the demands of industrial environments with extended operating temperature range: -40?C to 85?C (-40?F to 185?F)