Amazon.com: C2G Legrand USB... www.amazon.com

3ft (1m) USB to Serial... www.startech.com

USB to TTL Serial Cable -... www.adafruit.com

C2G 1.5ft USB to Serial... www.cdw.com

Amazon.com: StarTech.com... www.amazon.com

icusb232sm3.main.jpg www.startech.com

USB 2.0 To Serial DB9 Male... sabrent.com

USB to RS-232 Adapter (35... www.aten.com

USB to Serial Null Modem... rocstor.com

USB to serial RS232 adapter... www.usconverters.com

Manhattan USB to Serial... manhattanproducts.us

Amazon.com: SABRENT USB 2.0... www.amazon.com

USB/Serial Converter... www.adafruit.com

USB 4-Port Serial Adapter -... www.coolgear.com

USB-C Serial Cable -... redpark.com

Manhattan PL-2303 USB to... manhattanproducts.us

Adafruit Industries USB to... www.microcenter.com

Eaton Tripp Lite Series 5ft... www.cdwg.com

10ft (3m) USB to Serial... www.startech.com

Adtran USB to Serial... dcomcomputers.com