Dual Port USB to Serial RS-232 DB-9 Adapter Cable FTDI Chip
Uwe Wannags, Hard-+Software Distribution e.K. | CFR-USB-232A-1 | Third Party Distribution, Hardware, Software und Services rund um Echtzeit, Embedded Systems und QNX für Deutschland und Europa: Multiportlösungen, Netzwerklösungen, RAD Tools und RAID
USB to Dual RS232 Adapter / Converter – CommFront
XTend300 | Dual RS-232 Serial Adapter for X-ES Products
Rs232/rs485 To Network Port Module Dual Serial Port Eth Rj45 Industrial Grade Two-way Transparent | Fruugo SK
Dual port RS232 Serial to USB adapter for RS232 data conversion.
Amazon.com: Dual Ports Serial RS-232 COM DB9 Male to USB2.0 Adapter Cable USB to 2X RS232 : Electronics