uplcom(4) USB support for Prolific PL-2303/2303X/2303HX serial adapters driver


To compile this driver into the kernel, place the following lines in your kernel configuration file:
device usb device ucom device uplcom

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:



The driver provides support for various serial adapters based on the Prolific PL-2303, PL-2303X and PL-2303HX USB-to-RS232 Bridge chips.

The device is accessed through the ucom(4) driver which makes it behave like a tty(4).


The driver supports the following devices and adapters:

  • ADLINK ND-6530 USB-Serial Adapter
  • Alcatel One Touch 535/735 Phone
  • Alcor AU9720 USB-RS232 Serial Adapter
  • AlDiga AL-11U Modem
  • Alltronix ACM003U00 Modem
  • Anchor Serial adapter
  • ATEN UC-232A
  • BAFO BF-800 and BF-810
  • Belkin F5U257
  • BenQ S81 Phone
  • Corega CG-USBRS232R Serial Adapter
  • Cressi Edy (Seiko) Diving Computer
  • ELECOM UC-SGT Serial Adapter
  • HAL Corporation Crossam2+USB IR commander
  • Hama USB RS-232 Serial Adapter
  • Hamlet exagerate XURS232
  • HP LD220 Point-Of-Sale (POS) Display
  • IOGEAR UC-232A
  • iTegno WM1080A GSM/GFPRS Modem
  • iTegno WM2080A CDMA Modem
  • Leadtek 9531 GPS
  • Micromax 610U Modem
  • Microsoft Palm 700WX
  • Mobile Action MA-620 Infrared Adapter
  • Motorola Cables
  • Nokia CA-42 Cable
  • OTI DKU-5 cable
  • Panasonic TY-TP50P6-S flat screen
  • PLX CA-42 Phone Cable
  • Prolific Generic USB-Serial Adapters
  • Prolific Pharos USB-Serial Adapter
  • Radio Shack USB Serial Cable
  • Sagem USB-Serial Adapter
  • Samsung I330 Phone Cradle
  • Sandberg USB to Serial Link (model number 133-08)
  • Sanwa KB-USB2 Multimeter cable
  • Siemens/BenQ EF81, SX1, X65 and X75 Mobile Phones
  • Sitecom USB-Serial Adapter
  • SMART Technologies USB-Serial Adapter
  • Sony QN3 Phone Cable
  • Sony Ericsson Datapilot
  • Sony Ericsson DCU-10 and DCU-11 (Susteen) USB Cables
  • SOURCENEXT KeikaiDenwa 8 (with and without charger)
  • Speed Dragon USB-Serial Cable
  • Syntech CPT-8001C Barcode Scanner
  • TDK UHA6400 and UPA9664 USB-PHS Adapters
  • TRENDnet USB to Serial Converter (TU-S9)
  • Tripp-Lite U209-000-R USB-Serial Adapter
  • UIC HCR331 Magnetic Stripe Card Reader
  • UIC MSR206 Magnetic Stripe Card Reader
  • Willcom W-SIM DD PHS terminal.(WS002IN)
  • YC-Cable USB-Serial Adapter
  • Zeagle N2iTion3 Diving Computer


The driver appeared in Nx 1.6 . This manual page was adopted from Nx by An Tom Rhodes Aq [email protected] in April 2002.