32 Port RS-232 USB-to-Serial Adapter - Coolgear
StarTech.com ICUSB23216FD USB to Serial Hub - 16 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub - Newegg.com
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN Corporate Headquarters
4-port USB to Serial RS232 Converter
StarTech.com 4 Port Serial Hub Adapter USB to RS232/RS485/RS422 Converter - ICUSB234854I - -
Parallax USB to Serial (RS-232) Adapter with Cable - Parallax
4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Everything Else
4 Port USB to RS232 Serial Adapter Hub - Serial Cards & Adapters | StarTech.com
4-Port USB to RS-232 Serial Adapter Hub
StarTech.com 16 Port USB to Serial RS232 Adapter Hub - Daisy Chain - ICUSB23216FD - -
Black Box 8-Port USB to RS232 Serial Adapter / Converter, 8 x DB9 Male - IC1023A - -
StarTech.com 8 Port Serial Hub USB to RS232/RS485/RS422 Adapter, Industrial USB 2.0 to DB9 Serial Converter Hub, IP30 Rated, Din Rail Mountable Metal Serial Hub, 15kV ESD Protection - 6ft Locking Cable
8-Port USB to RS-232 Serial Adapter Hub
Usb Serial Prolific | 9 Pin Serial Cable | Pin Cable Adapter | Usb Adapter Cable - Pc Hardware Cables & Adapters - Aliexpress
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
4-Port USB to Serial RS232 Hub | TRENDnet - TRENDnet TU-S4
