StarTech.com USB to Serial Hub - 8 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub - Convert a USB port into 8 RS232 serial ports in an industrial rack-mountable chassis, and daisy chain multiple hubs for a scalable solution - 8-Port USB-to-Serial Adapter Hub - USB to RS232 port adapter with FTDI chipset and COM port retention