Digi Edgeport Serial Hub
StarTech.com 4-Port Serial PCIe Card, Quad-Port RS232/RS422/RS485 Card, 16C1050 UART, ESD Protection, Windows/Linux, TAA-Compliant
StarTech.com USB to RS232-RS485-RS422 4 Port Serial Hub Adapter - Industrial Metal USB 2.0 to DB9 Serial Converter - Din Rail Mountable
StarTech.com USB to RS232-RS485-RS422 8 Port Serial Hub Adapter - Industrial Metal USB 2.0 to DB9 Serial Converter - Din Rail Mountable
StarTech.com USB to Serial Adapter Hub - 4 Port - Industrial - Wall Mount - Din Rail - COM Port Retention - FTDI USB Serial
StarTech.com USB to Serial Adapter Hub - 8 Port - Industrial - Wall Mount - Din Rail - COM Port Retention - FTDI USB to RS232
StarTech.com USB to Serial Hub - 16 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub
StarTech.com USB to Serial Hub - 8 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub